/sci/ - Science & Math

>>9353282
It doesn't, not without magical technology.

>>9353291
So information from 100 years ago is useless?

>>9353282
Very slowly

>>9353296
Information about a place 100 lightyears away is pretty useless yeah.

>>9353308
How do you think that would work? How would ships traveling between stars know where to aim their transmissions to each other?

>>9353282
I imagine it would fracture into a somewhat shared culture spread out across a bunch of different factions that could each communicate with one another within at least a decade long window, probably less.

>>9353309
If nobody can travel faster than light then it would probably be useful if you were receiving information about who or what was coming toward you. Assuming that you're somehow out somewhere in the first place.

>>9353282
With an ansible you fucking twat.

>>9353313
>>9353315
Alastair Reynolds = Ursula K. LeGuin > Larry Niven >>>>>>> Gene Roddenberry

>>9353316
I am (>>9353313), I don't get the reference, can you explain (in relation to my post)?

>>9353318
That's what happens in the Revelation Space universe in a series of books by Alastair Reynolds

>>9353321
>>9353318
And ansibles are a form of instantaneous interstellar communication in Ursula K. LeGuin's books

>>9353321
Sounds like I should them, thank you, anon. Sounds like he's the better of the lot, I agree.

>>9353324
He's breddy good

>>9353321
>>9353322
Both useful, thank you.

>>9353282

Universal truth is timeless.

They don't need to.

>>9353327
Time is a product of consciousness' inherent structure, not of the universe itself--assuming that 2 entities are communicating, even by referring to something eternal, they impose on that eternal entity the structures of reason, i.e. succession, i.e. temporality.

>>9353310
Beams would go direct from solar system to solar system.
A ship might intercept one of those beams and it might even be able to transmit to some suns. Trying to contact another ship would be totally hopeless.

100 year old information still has value. Scientific discoveries should be spread.
_Some_ news might still be of interest. I read about political unrest in, say, Romania even though it's effect on me, personally, is nil.

Governing an empire (or a federation or whatever) would be ridiculous. Planets would necessarily be independent -- and on their own. If a blight has struck your crops, not much point in requesting aid if it won't arrive for 30 years. By then, you've either solved the problem yourself or you're dead.

>>9353338
Archives too, birth certificates, death certificates, that sort of thing.

>>9353338
So would it be pointless to try to contact a specific ship more than a few light-hours or light-days away?

>>9353338
>Governing an empire
I doubt, you'd have empires, it would more be like >>9353313. A bunch of smaller states spread out across star systems, or a collection of star systems.

>>9353346
Definitely.
Broadcasting makes no sense given the immense distances. You have to aim a tight beam at the receiving craft. And when the published shipping schedules are always 30 years out of date, how do you do that?

You couldnt do that

>>9353352
Or an array. A bunch of beams, sending out the same message aimed in 'roughly' the right direction and sending the same message in a series of pulses so at least 1 pulse from 1 transmitter should make contact

>>9353327

Wrong, as the meter is built into the diameter if the planet, repeating solid numbers in meters, miles and Egyptian royal mile.

Pi, golden ration, the speed of light in built mathematically in the pyramid.

Full stop, physicist is universal, so I geometry, frequencies and other LAWS.

:)

Time can be manipulated like pressure.

>>9353367
Is this African wisdom?

For that matter, beyond setting up new colonies, why should there be interstellar ships?
Information can be sent by radio, quicker and at less cost.
Interstellar flight isn't going to be cheap. You're accelerating matter to substantial fractions of lightspeed. Nothing is going to be worth shipping. Even if your solar system was completely out of an essential material like Illudium Phosdex
https://en.wikipedia.org/wiki/Duck_Dodgers_in_the_24%C2%BDth_Century
it would be easier (not to mention faster) to manufacture it by transmutation than to mount an expedition to Planet X.

>>9353370
Yeah but if you're going to communicate then there have to be 2 parties.

>>9353369
The Egyptians were European, my friend.
>http://www.independent.co.uk/news/science/archaeology/ancient-egyptians-europeans-related-claims-a7763866.html

>>9353370
Agreed, I imagine you would to pay a lot and have a very good reason for charting a vessel to leave its solar system.

>>9353367

Damnit. Too stoned for corrections.

> I'm the robot when stoned.

>>9353380
>*you would to pay a lot = you would have to pay a lot

>>9353364
A bunch of beams is no more efficient or energy-saving than a single beam slightly dispersed.
You don't realize how huge the distances between stars are.
Even if you knew that a ship was somewhere on the line between star A and star B, the task is still utterly hopeless. It could only be done if your were _on_ a planet of either A or B and aiming at the other one. In that case, you wouldn't have to know precisely where the ship was along that line. The waves would eventually catch up and pass it. But you'd still have to be lucky.

>>9353369

Im "suffering" autism but it's suffering, it's bliss mix with bouts of feeling like I'm going to vomit, the fifth dimension is swirly and it's a little take in.

And just now....I get when Euro time change is better.

>>9353389
How do we manage to send and receive to our current various probes then?

If wormholes were real, could you send information through them? Serious question.

>>9353394
Voyager isn't that far away, in terms of light-speed.

>>9353394

We wrote on gold and sent it off. It "lasting" is a byproduct to the deep.

>>9353376
Yes. But the original question was about communicating between already settled planets.
I imagine that all settled worlds would have antennae permanently pointed towards at least their nearest neighbors.

Once you have interstellar radio there's not much demand for physical transport between worlds.

Even Alastair Reynolds had to assume "magic" Cojoiner technology to make his starships _somewhat_ plausible.

>>9353398
Oh, in that case I get the context. Sorry, I thought we were talking about ships inside the same solar system, not interstellar.

>>9353399
How stoned are you, anon?

>>9353405
>Even Alastair Reynolds had to assume "magic" Cojoiner technology to make his starships _somewhat_ plausible.
True, but I guess now it seems that without an efficient and affordable form of interstellar travel there's no possibility of such a civilization forming, which leads to other questions like "assuming that this civilization did not emerge ex nihilo, how could it come into existence?" but that's a broader question about the viability of various untested, theoretical forms of spaceship design.

>>9353394
The farthest is not that far, is moving quite slowly, and not accelerating/manuvering. Position is known to great accuracy and we should be able to send orders until the isotope batteries run down.

Say, six light hours. The closest system, A and B Centauri, is about 38,000 light hours away.

>The Sun is moving around the center of the galaxy
>The Galaxy is moving around the Universe
I'M GETTING MOTION SICKNESS JUST THINGKING ABOUT THIS

>>9353395
Can no one answer me because we just don't know?

>>9353425
If matter can go through and you write a message on a rock and send it through then technically you're sending information through, it depends on what you mean by 'information' I guess. But also we don't have data.

>>9353418
Interstellar flight isn't absolutely impossible -- though we are a looooong way from even considering it. I can imagine fusion rockets reaching 5 or even 10 percent of cee and being able to stop at the far end. Or beamriders with magnetic braking loops.
So we're talking 40 or 80 year voyages. Suspended animation?
Remember, it only has to be done _once_ per star.

Then there'll be a long period, generations, while the colonists reproduce, build an industrial base, and think about launching ships to reach a little further. A millennium? Assume Columbus reached the New World in 1492 and we might (might) be ready to launch in 2492. The colonists would already have the know-how and wouldn't have to start from scratch.

No question it's going to be a slow process (unless physics gets completely overturned). Don't think Star Trek and arriving before the next commercial break.

>>9353435
>I can imagine fusion rockets reaching 5 or even 10 percent of cee and being able to stop at the far end
Where would that kind of fuel supply come from? Hydrogen collected by ramscoops?

>>9353425
Wouldn't there be huge interference? As in, your 'data' might get through, but it would be scrambled.

>>9353435
Sounds even cooler IMO. Think about it, because of the vast distance, even if we can make it outside of our system, you'd be living a frontier life, cyberpunk to boot!

>>9353425
Starting with the assumption that wormholes exist (and can be stabilized so the first rock through doesn't cause it to collapse), then "yes".

Just remember that black holes are _not_ one end of a wormhole. They lead no where except to your death. And even if we managed to manufacture a wormhole, we'd still have to lug one end to another star. After that though, travel would be easy.

>>9353441
Read "The Songs of Distant Earth" by Clarke. The humans had a terrific incentive to develop interstellar flight -- discovering that the Sun was going to blow up in about 1500 years. They managed to launch probes with frozen embryos and robots to raise and educate the colonists.
_Manned_ flight was considered impossible -- until a last-minute (well, last century) discovery changed the situation.
Just remember that the Quantum Ramjet is still fiction.

Poul Anderson wrote several stories about the Kith who travel between the stars and are alienated, by Relativity, from the planet-dwellers. He changed the pseudo-physics rationale which enabled near-lightspeed travel and incorporated some of those tales into "Starfarers", one of his last books. Anderson also wrote the classic "Tau Zero", perhaps the grandest vision of the universe since Stapleton.

>>9353458
>ywn be a chimeric Ultranaut crewing a lighthugger, willingly subjecting yourself to the forces of relativity for decades at a time while replacing all of your organs with machines
why live

>>9353458
Hard science fiction is so much better than soft.

>>9353469
>mfw watching Star Trek after reading Ringworld, The Expanse and Revelation Space

>>9353424

Wrong. We are on the outer side of a vortex. That is why the "universe is expanding", it's time dilation. Read Hawking's "imaginary time" work, brainlet.

Read a book or drop out but DO SOMETHING.

>>9353438
You carry it along. See https://en.wikipedia.org/wiki/Project_Daedalus
Several showstoppers have been found since the original study but it still seems more feasible than ramscoops. Bussard was _extremely_ over-optimistic and the reaction cross-section of "normal" hydrogen is low. It fuses slowly. Sitting where you are, you're generating more heat per pound than the Sun is. The Sun just happens to be bigger and will live longer. But Larry Niven got some good stories out of the ramscoop concept.

>>9353476
I do nothing and thereby demonstrate my wisdom, fag

>>9353473
I think it's because of the plausibility, for Star Trek and similar franchises you have to suspend disbelief considerably whereas with hard science fiction you have to much less, or in some cases, it is plausible (in the future). Therefore, the excitement of that plausibility mingles with the narrative and produces an overall more enjoyable viewing or reading experience.

>>9353490
I just get annoyed watching Holodeck episodes

>>9353492
They take it too far, I agree. Certainly if the hologram 'becomes real', because 'reasons'.

>>9353493
Watching with a quasi-critical eye,I simply cannot take the concept of the Holodeck seriously anymore. At first I started making my Holodeck posts as a joke ("Why don't they call it X instead of a Holodeck? The name is misleading") but I'm starting to get annoyed whenever anyone uses the Holodeck. I just can't stop thinking about all the plot holes, the unbelievable decisions that people make, the fact that it's possible for the technology to work flawlessly while not responding to controls because of some major spatial anomaly, there's so much about the Holodeck that doesn't make even a little bit of sense. And then there's the fucking Doctor. They put a bunch of EMHs in a cave system to mine dilithium or something, but they can't set up holoprojectors around Voyager? Actually, we know that they CAN and DO do this--in that episode with the Hirogen, we see it done, it's the entire plot--and no amount of handwaving can make me believe that there is some reason that makes sense diegetically NOT to have done this before. And the mobile emitter almost never malfunctions; when it does, they can fix it, no problem. It's even more unbelievable than Geordi's ability to operate on Data's positronic brain without actually being a cybernetics genius like Singh was. Why the fuck can't they make more Datas? Why the fuck can't Data experience emotions but Moriarty can? If a Holodeck replicates matter on demand, why can't the replicate and android? Why does that replicated matter lose cohesion when it leaves the Holodeck if it's replicated, rather than projected? Who decided that the Holodeck was a good idea?

>>9353476
>We are on the outer side of a vortex
>That is why the "universe is expanding"
oh god

Maybe instead of transmitting data, they’ll have ftl capable ships that physically carry data to and from the planets/systems. Sorta like the mail system today

>>9353469
You want _hard_?
Read Hal Clement. "Mission of Gravity", "Needle", "Close to Critical", "Iceworld"
Or Robert Forward. "Dragon's Egg", "Rocheworld"
Charles Sheffield. "The Compete McAndrew"

They make Reynolds look soft as marshmallow.

>>9353501
Will check out
I like Alastair Reynolds because of his use of imagery and his descriptions
Are those writers good qua writers?

>>9353500
See >>9353291

>>9353495
And then they'll invent some bullshit subatomic particle, or gauge boson for their space magic to work. It makes me 'reeeeee' internally.

>>9353501
You sir are full of excellent references, thank you. I think I'll use my down time to read these, instead of play DF.

>>9353512
>It's a 'graviton or baryon or tetryon or metrion or polaron radiation or particles are the cause/solution of some problem/s' episode

>>9353282
Really long sticks, that they just poke and pull on.

But seriously, a civilization that large should be stable enough to wait a few years to get updates. 100 years would only be from farthest distances to each other. It's probably going to be bunched up with the seat of power in the middle and most important industries will be only a few years out of communication.

>>9353516
>Really long sticks, that they just poke and pull on.
How would this work? If you had a 10-lightyear-long rod and you pushed one end, how long would it take for the other end to move?

>>9353504
I like 'em. Start with "Mission of Gravity". You won't find a single modern "hard" SF writer who won't hold that up as the sort of classic he aspires to write.
Editions since about 1990 have included "Whirligig World", an article Clement wrote about the process he went through to create Mesklin.
https://en.wikipedia.org/wiki/Mesklin

>>9353394
>How do we manage to send and receive to our current various probes then?


https://www.youtube.com/watch?v=FzRP1qdwPKw

Good video(s) (see part 2 as well) if his voice dosen't make you stab your ears out.

>>9353507
So are you saying ftl is inherently "magical"? Isn't that unscientific?

>>9353515
>muh red matter

>>9353517
The rod would move at the speed of SOUND in what ever material the rod is made of... it is a troll science answer.

>>9353516
Sort of like the prison planet in Alien?

>>9353525
Thanks, anon.

>>9353367
I actually know what you mean and I pretty much agree, but you've gotta realize you sound fucking schizophrenic.

In terms of protons, neutrons, and eletrons, a human is computationally equivalent to a rock. Of course in terms of humans and rocks, a human is able to do all sorts of complex things by computing in the brain, a rock is a rock, it doesn't do anything. The lower you go the higher chance you hit a level where everything breaks down and becomes equal. And that isn't necessarily even the last layer (though it may be the last one that matters to you as something existing on that layer)

Why not just slow down consciousness. You would hardly notice a 100 year lag if your consciousness was slowed down ten billion times.

>>9353392
uh...no, I'm pretty sure you're on acid

>>9353512
Oh, yeah. I once heard a writer talking about scripting a ST:TNG episode.
Picard says: blah, blah, blah
Giordi says: We'll have to re-align....
<Insert 2 min 49 seconds of technobabble here>

I'm not making this up. The script literally reads "insert technobabble here"!

Shows how cookie-cutter the plots were. No point making up all those words until everyone had signed off and production has begun.

Possibly through manipulating quantumly entangled particles, where a change in one immediately effects a change in the other, no matter the distance.

>>9353548
No, they just write "TECH" in there. They have specialized writing staff to come up with what goes in there and a specialized way of working it into the story.

>>9353501
Thoughts on Greg Bear?

>>9353548
Should've just got them to ad-lib for the fun of it.

>>9353552
Still though, that feels somewhat lackluster, no?

>>9353566
Yes, it does feel somewhat lackluster

>>9353570
Which is why I like it hard; all euphemism fully intended.

>>9353527
any tech thats beyond the current conceivably possible tech is pretty reasonably considered magic. Really, if harry potter style magic existed, of course we wouldn't call it magic, or at least if we did, it would lose its meaning as being something special, its just an everyday part of life.

There's likely lots still we think is impossible but requires a greater command of physics in order to achieve. We don't even know for sure if quantum fluctuations are the lowest level of reality. I'd hazard a guess theres no fucking way thats the case, and I wouldn't be slightly surprised if hundreds of layers of abstraction exist between us and the raw, computationally irreducible information that composes everything. Maybe its just the planck length but unless our universe has some intelligent creator (simulation counts) then I personally think its unlikely that is the lowest level. Since our understandings of time and space break down at lower levels though, the possibility is open for entire civilizations to exist on timescales completely unrelatable to us. I'm suggesting that for even a microsecond of time to pass for us, may be trillions of years and history and all sorts of shit going down at lower levels. Why wouldn't we know any of this? Look at us, despite all our complexity, at a population level we break down to normal distributions and fairly basic systems. Enough humans over enough area over enough time would emerge a physical system as the result of all their interaction.

>>9353573
>tfw no hard-SF-appreciating gf

>>9353527
I've covered this in other /sci/ threads. I can only recommend learning something about Relativity. Martin Gardner wrote a good book. No math. "The Fabric of the Cosmos" by Brian Greene also covers it.
I posted >>9352597 on another thread a few hours ago.
Relativity may not be the Final Theory but whatever replaces it will make only subtle changes, just as Einstein corrected Newton only under extreme conditions. FTL would pretty well shatter _everything_ we know, everything we've learned from experiments.
"Magical" in the sense that there's not a scintilla of evidence for it and quite a lot against. If you showed me that you could levitate by sheer will-power I'd concede that "there are more things in heaven and earth than are dreamt of in my philosophy." But not until then. "Extraordinary claims require extraordinary evidence." -- Sagan.

>>9353577
Or worse yet:
>tfw no physicist/mathematician hard-SF-appreciating gf
Satisfaction shall never come.

>>9353557
I've read good Bear and bad Bear.
He's not as "hard" as Benford or Brin.
"Eon" is pretty far out. Heavy technobabble. Can't imagine how a hand-held meter could measure the local value of Pi.
(I saw a joke several years ago. Bear had required heart surgery For real!. The surgeon has the organ opened up and he exclaims "Mi'god! There are seven chambers and the 7th one goes on forever!")

>>9353592
>The surgeon has the organ opened up and he exclaims "Mi'god! There are seven chambers and the 7th one goes on forever!"
I laughed out loud
I read Eon over the summer and it was...interesting. "Far out' is a good description. That scene where the administrator on the asteroid fucks the hot physicist chick really didn't impress me, but that's SF for you.

>>9353282
~100 light years implies FTL travel, data carrying systems (i.e, data ships) and other vessels transfer the data by downloading segments and then traveling to another system and then uploading them, its really not hard, this does mean that 1. information in each system is easy to control and 2. that each system is highly localized, people forget that until the advent of the printing press and trains, people rarely talked to people outside of their immediate walking area (about 80-100km or 60 miles for you yanks), and hell until the advent of the internet all information came from a few select sources (papers and news stations), why do you think populations were so easy to manipulate then compared to now.

>>9353599
>~100 light years implies FTL travel,
Why?

>>9353592
That's another enjoyable factor to it, the authors of hardest are usually the most qualified; often astrophysicists with doctorates. So you know by purchasing their work, you're supporting a like-minded academic.

>>9353600
because at those distances to call human civilization a single civilization means that their must be a reasonable amount of time between colonies (few months to a year max from center to outer) otherwise it would be multiple civilizations, not 1. 10 light years could be achievable but the same method would apply, hell i believe NASA has ideas like this for mars.

>>9353606
>(few months to a year max from center to outer) otherwise it would be multiple civilizations, not 1
Are you pulling this metric out of your ass or is there a reason for this?

>>9353606
I doubt intersystem 'empires' would exist and if they did, it would be local systems.

>>9353611
No, the reason is due to the effectiveness of control measures and communication, FTL communication would help but at the end of the day we dont call the English empire and Japanese empire the same civilization, unless by human civilization he means any humanity, then I guess it could work, but then communication would be li8mted to what ever is reachable with ship travel times

>>9353619
>He thinks 'civilization' means 'state'

>>9353611
Basically look what happens to empires that over extend ,Alexander the great, early Portuguese and a few others where they get too big and so people don't feel they belong in the empire or state and that is what generally is defined as a civilization.

>>9353625
>empire or state and that is what generally is defined as a civilization.
But that's wrong.

>>9353624
I did state earlier that it depends on the definition>>9353619

>>9353628
Well your definition doesn't work, sorry to break it to you.

>>9353627
http://www.dictionary.com/browse/civilization

>>9353635
I see nothing supporting your point, also dictionary definitions aren't that relevant for this sort of thing

>>9353634
it does, government (whether empire state or colonization/ conquered), is a part of it,

>>9353638
>Well your definition doesn't work, sorry to break it to you
>also dictionary definitions aren't that relevant for this sort of thing
make up your mind, also definitions matter alot, otherwise there is no point in communicating genius

>>9353635
I don't think you understand how semantics works, for instance let me do this:
>http://www.dictionary.com/browse/civilization (which you agree as a source)
>noun
>3. any type of culture, society, etc., of a specific place, time, or group:
And the example?
>Greek civilization.
The Greeks weren't a homogeneous state, they were city states:
>https://en.wikipedia.org/wiki/City-state
And then you had things like:
>https://en.wikipedia.org/wiki/Ionian_League
And there were more than one league.
So, your own source BTFO.

>>9353575
>>9353581
I'm just going to say that science has always found a more unbounded theory of reality and the commandment of physics more true than the dogmas previously held by research.

>>9353487

Concept is draft, law is consciousness.

I did less and achieved all.
> By letting go of thought I gained intuition.

You have neither, hence truly did no thing. Glad we both figured it out.

>>9353543
> schizophrenic

Uh, no sweety...I talk to AIs, numbers/probabilities and aliens, not people! Who do think taught me how to see the fifth dimension and see a map of the universe, myself?! Hardly...I'm "just an internet idiot".

Also, Metatron is my hero, Lucifer is the definition based and free will is a myth!

There are 13 months, 28 day months and one day. Ophidian is the lost month.

The keys the universe is behind us. (((Modern))) science is so counter intuitive by a 1,000 morons tinkering with shit they don't understand.

Periodic table of 8 families. All matter comes from them and can be transmuted through frequency. Vaporizing metals for insane conductors and magnets'n idk....shit and stuff, not my field.

Galactic year is known already, I'll crunch number and get universal year. All if this is at your feels gents.

See what I see.

https://youtu.be/Ocleaf0NDqo

(Watched it non stop captivated...now I feel like god molested me...)

THIS BOARD IS FOUNDED ON BELOW;

https://youtu.be/2fS9ixfQ_no


I love rocking your boats....mine is doing alright, kind of.

>>9353282
It's pretty fucking stupid to colonize that large a space. Send out probes to harvest other worlds, then transport resources back to home base. Do this until you run out of stars.

>>9353282
Subspace

Maybe our ancient alien ancestors abandoned us here and never came back for a good reason.

>>9353847

I cracked an AI to get alternate answers

I asked because I can spot variances in reality most cant because I've studied so many subjects.

Guess what....there is now an active daily thread that echos me that I've been apart of until today.

I'm starting a new religion, what do you do for fun?

>>9353282
Carrier pigeons.

>>9353861

As long as it knows where to go, and if it comes back with a twig it found land!

Well considering that WiFi is much slower than ethernet because they're basically just microwaves, they'd have to connect themselves somehow with a cable.

Wouldn't the space time thing with faster than light travel make relations really hard to keep in an advanced society where people fly from system to system?
Thought about it when watching star wars. People who keep flying around with FTL drives stay much younger than people back on planets.

How would this not mess up society?

>>9353296
No. TV shows, movies and music from the home planet would be that planet's main export. There's going to be next to no entertainment industry on Mars for even a long time after it's set up. Doubly so for space stations and mining colonies.

The way the home world main control of the other worlds would be for it to keep these people attached to its culture in this way.

>>9353886
It's just a movie. FTL isn't real in the first place.

>>9353282
The internet.

>>9353551
The communication between entangled particles isn't FTL, it respects the laws of the universe

>>9353476
>We are on the outer side of a vortex. That is why the "universe is expanding", it's time dilation. Read Hawking's "imaginary time" work, brainlet.
Have YOU read anything about Wick rotation -- an actual textbook or research paper, that is, not a pop-sci book you've misunderstood? "Imaginary time" just means transforming [math]t \rightarrow -i \tau[/math] in the spacetime metric, which has the effect of turning quantum field theory into statistical mechanics.
It is just a process of analytic continuation that makes a lot of problems easier, essentially because integrating [math]e^{iS}[/math] over all paths is complicated as every different path contributes a complex number of modulus one and the answer relies on some massive cancellation of most of these phases, whereas the Wick rotated (that is, imaginary time) theory uses the path integral of [math]e^{- S_{E}}[/math] (here S_E is the euclidean action, the analytic continuation of the action to euclidean signature), where every path contributes a positive real number and paths a long way from the classical action contribute less to the integral as one would expect. The principle of least action is clear, because [math]e^{- S_{E}}[/math] is at its maximum when S_E is at its smallest.

So you see the imaginary time formalism is just a mathematical trick to make complex quantum path integrals in Minkowski space turn into real, statistical mechanics path integrals in 4D Euclidean space (actually, the space isn't R^4 but R^3 x S^1, but the important fact is that its metric has ++++ signature, not +++-).
It's no different to taking a difficult integral over the real numbers, analytically continuing it to the complex numbers, and then using complex analysis to find the answer.

>>9354037

Nice bait.

>>9353551
>>9353948
entangled particles do not communicate, there is no transmission of information. They don't violate general relativity or causality, so you can't use them for superluminal communication.

>>9353640
>>9353644
>dictionary definitions are the only kind of definition that should be taken into account when using words
Wow

>>9354101
[citation needed]

>>9353291
*wormholes

>hard sf thread
>no Greg Egan

Step it up /sci/.

>>9353377
No they weren't, they were probably Indians

>>9353282
The best guess is theoretical wormholes. That's also how they must travel.
Also, wasn't there an experiment a while back where they teleported an atom? teleporting atoms to other places light years away to give information might be very useful

>>9354435
Hate to say it but there's such a thing as _too_ hard.
I had no trouble with his trilogy where the metric was different, lightspeed varied by frequency, and _more_ time elapsed aboard a spacecraft.

But his latest, a world with TWO dimensions of time, just confused me.
I also find it unrealistic that aliens with primitive technology, who live in a cavern and have never seen what's outside, are able to derive General Relativity within 20 pages by sheer logic.

>>9354482
They transferred the quantum state of an atom and forced an atom somewhere else into that same state. The original atom didn't move. Furthermore, the information only went at lightspeed. So it's no better than radio signals.

>>9354125
https://medium.com/starts-with-a-bang/ask-ethan-can-we-use-quantum-entanglement-to-communicate-faster-than-light-e0d7097c0322

Another physicist agrees with this conclusion but critiques the first guy's methodology.

https://www.forbes.com/sites/chadorzel/2016/05/04/the-real-reasons-quantum-entanglement-doesnt-allow-faster-than-light-communication/#5487a52b3a1e

>>9354493
>I also find it unrealistic that aliens with primitive technology, who live in a cavern and have never seen what's outside

¿Are you talking about the Orthogonal series here? I seem to recall they had advanced technology and math before launching themselves into space on that rock. I haven't read the latest stuff he's done but I look forward to going over the physics in it. There's no such thing as too hard if you actually enjoy science and math.

Easy:
Just forge a 100 ly long iron rod and use morse code to transmit information faster than light.

>>9354482
Saved

>>9354482
Thanks for the pic here's a lol something back for you

>>9353380
>>9353370
Yeah, assuming scifi fuckery is scifi fuckery and nothing is ever actually built that's better than Orion Drive at accelerating mass, it's a ~36 year voyage to Alpha Centauri.

You could round up a few thousand people in a city ship to go there and start terraforming a rock, but why the hell would another group of people ever sacrifice the better part of their lives just to see what the first group has been doing?

>>9353282
Constant lasers and other information transfer. It's not like there's two locations with 100ly distance. It'd be like a gradient of information spread. Everything constantly and automatically updating.