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/sci/ - Science & Math

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3569235 No.3569235 [Reply] [Original]

Ask a math Ph.D anything.

>> No.3569241

>>3569235
What's the best way to learn discrete mathematics?

>> No.3569246

>>3569235

Complete this:

n=7^7 p(x)
n=?

>> No.3569247

What's your expertise (field of research)?

>> No.3569256

how do i prove P((a,b)) = P(a) * P(b) is a valid probability measure

>> No.3569262

>>3569241
Study things computer programming and diversify your education

>>3569246
What are you trying to describe first of all?

>> No.3569265

>>3569235
P=NP?

>> No.3569274

If a number is "not real" Than what is it and how can it be?

>> No.3569277

>>3569235

can you PROVE that you are a math Ph.D

>> No.3569288

>>3569262
*things like

>>3569247
Appl. math in my undergrad. number theory, computation for grad studies

>> No.3569297

Favorite programming language?

>> No.3569301

>>3569235
I have the given equation: (6^x+6^-x)/6 = 2. How do you solve this?

>> No.3569302

300k starting?

>> No.3569304

Where'd you go to grad school?
How was number theory? I'm thinking of doing it myself, but don't know exactly which field of math I'd most like to do (and be most successful in).

Also, what sort of employment opportunities are you looking at?

>> No.3569306

Solve, showing your work: 3^x + 2^x = 50? You're a math Ph.D. You should be able to do it easily.

>> No.3569309

>>3569274
in my opinion, the idea of a number is that it is the base of all representation...and because math is essentially a form of encoding I wold say that all numbers are real. this is just my take and it can be easily argued.

>>3569277
What kind of proof do you want?

>> No.3569310

how to get from the left to the right expression?

1/((4k-3) (4k+1)) = 1/4(1/(4k-3)-1/(4k+1))

>> No.3569314

will you stay in academia? if not, what do you hope to do?

>> No.3569317
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3569317

>>3569235
Why do mathematicans get all the girls?
Is it really cause ya'll have such big cocks?

>> No.3569327

Btw, I'm not really here to do anyone's homework. I feel strongly about that.

>>3569304
Uni. of Chicago

>> No.3569333

>>3569327
>chicago

you must have really rich parents

>> No.3569335

>>3569327
number theory feedback?

>> No.3569351

Does the set of all normal sets (sets that do not contain themselves) contain itself?

>> No.3569352
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3569352

All you need is toast, fuck math.

>> No.3569354

>>3569304
>>3569335
>>3569301
He's trolling faggots...

>> No.3569359

>>3569327
AKA

I cannot work the math out.

>> No.3569361

>>3569297
Don't make fun of me for this but google has something new called "Go"

>>3569304
definitely go into some kind of programming or engineering. I've started a business and going pretty well so I'd rather not look for "employment":)

>> No.3569363

>>3569352
goatse

>> No.3569372

Whose is the greatest mathematical mind of all time? My math geek says it's Gauss.

>> No.3569368

>>3569335
Number theory is intellectually satisfying, but I haven't gotten much more out of it than that.

>> No.3569377

>>3569361
what does your business do?

>> No.3569383

>>3569354
>>3569359

Sorry. That's not going to work on me. You guys will thank me in the future. However, I am willing to help in other ways

>> No.3569388

>>3569235
You don't have a Ph.D. in mathematics.

>> No.3569390

>>3569383
here's a question for you that isn't homework:
i'm considering computation biology. what maths in particular should i focus on? i'm sure you know that this field makes extensive use of modeling as well...

>> No.3569393

>>3569383
It's the simplest way for you to prove you are who you say you are, without divulging any personal information. Your answers to other questions aren't exactly showcasing your doctorate-level math knowledge.

>> No.3569395

>>3569383
Work how?

>I have a Ph.D in mathematics.
>Refuses to do even the simplest of computations on the vague premise that "we will not get him."

>> No.3569399

>>3569372
Wow. it's impossible for me to pinpoint one person. there were/are so many great minds out there. Gauss is definitely high up there.

>>3569377
Well lets just say it's responsible for many online giants making large amounts of money. I can't say much more without losing my anonymity

>> No.3569410

>>3569390
Well what in specific do you want to do in comp bio? then I can be more specific. this is a wide field. good income potential too.

>> No.3569429

I am confused. Do you do computational number theory?

>> No.3569428

>>3569393

If you were smart, you would try to find out about the industry like others are. Academia is unforgiving...but I guess I'm assuming that you want to get into the math field.

>> No.3569430

>>3569410
i'm actually really interested in predicting molecular structure (like rna or protein folding). also in modeling biological processes like the beating of the heart.

>> No.3569438

>>3569430
not op but there is a lot of topology in protein folding. Be able to use statistics very quickly (Hidden Markov Models and the like), and be very adept at writing Monte Carlo type algorithms. Bioinformatics seems to live off of Monte Carlo and related stuff

>> No.3569446

>>3569438
i'm currently working through a stats class, but intend on doing more in the future. haven't taken any topology yet, but will have to do so, evidently.

>> No.3569458

>>3569446
The kind of topology you need for protein folding is not what you'd get on your first course, you can probably not bother with a fair amount of point-set topology for bioinformatics. Much more important for bio-maths: Heart beats = Differential equations and automata and the like
Genetics and stuff = Computational statistics

>> No.3569467

Hi, OP.

1. How old are you?

2. Would you consider yourself below average, average, higher than average, of exceptional intelligence?

3. Would others consider you of below average, average, above average, or exceptional intelligence?

4. SAT/ACT scores?

5. Undergrad university? Grad? PhD?

6. Was undergrad math difficult for you?

7. Would you say you're a natural at school/math, or you can get it done if you study hard, so to speak?

8. What was your PhD thesis?

9. Were you always interested in math? Or did you go to university for something else and then pick math later?

10. Are you married? Do you have kids? Do you have any pets? How many girlfriends have you had? How many sexual partners have you had? When did you lose your virginity?

11. Would you say you are more the secluded, loner, unpopular type who stayed in and studied more, or the social butterly jock who got laid every weekend and still was a genius and able to do his math degree?

>> No.3569468

>>3569235
Hey OP, also starting PhD in maths in an area called Coarse Geometry.

>> No.3569472

>>3569458
is the topology related to protein folding very advanced? academically curious, in addition to practical interest

>> No.3569476

>>3569472
what do you mean by very advanced? I started to come across protein folding type stuff in third year, i.e. a course that was building towards homology. It's not crazy advanced, but it's not really undergrad stuff.

>> No.3569480

>>3569395
No response -- typical.

Let me ask you another question: How is it that you decided to come to an anonymous message board stating that you are a mathematics PhD, and then refuse to work out any math problem given, regardless of their simplistic nature?

>> No.3569484

>>3569429
Yes. are you interested in it?
>>3569430
Ditto what >>3569438 this guy said. Also, you want to study molecular mechanics. I have a friend that's in bio physics research and he would love to have someone on the math side.

>> No.3569494

>>3569484
I'm currently doing a project in computational algebra and I am very interested in number theory. What sort of number theory do you do with computers? Are you basically studying cryptography? I've never really come across a computational approach to numbers...
I'm >>3569429

>> No.3569498

>>3569484
Words. Words. Words.

>> No.3569502

>>3569476
that is actually about what i meant by advanced - where in your overall academic career, undegrad and beyond, you would encounter this kind of topology. nonetheless, do you have a preferred topo text for someone wanting to get their feet wet?

>>3569484
am specifically trying to bulk up on the math side of things, as most people i run into in lab or school are more strictly biologists, which is cool but doesn't always seem to be the best approach.

>> No.3569516

>>3569502
sutherland-intro to metric and topological spaces

That should cover all of point-set topology that you need ever but is slightly dry. Very short though.

Then
John Stillwell, Classical Topology and Combinatorial Group Theory

This introduces the more fun kind of topology with loops and coverings and the like. This is slightly dense but some of the results in it are awesome (Nielsen-Schrier theorem with a 4 line proof or something ridiculous)

This is topological, for the applied side you'd need to look at applied knot theory which I know little about.

>> No.3569544

>>3569467
>>3569467
>>3569467
>>3569467
>>3569467

HEY OP ARE YOU GONNA ANSWER?

>> No.3569541

>>3569516
thank you, i will start with sutherland. are you also a Dr.Maths?

>> No.3569555

>>3569467
1.30
2. Average
3. Above average
4.2300
5. Undergrad. IIT, Grad/PhD University of Chicago
6. Yes
7. No I definitely wasn't a natural but I caught up over time.
8.Online Algorithms
9.Always interested. Also interested in music
10. No, No, Yes, 2, 1, 18
11. Wasn't popular until senior and even then I only had a close knit small circle of friends.

>>3569480
An old T.A. sent me the link believe it or not.

>>3569468
Congratulations

>> No.3569608

>>3569494
I have former colleagues that got into cryptography actually. I started working for myself after grad school and I don't even use most of what I've been studying. I'm not sure what you mean by "a computational approach numbers" are you asking how does number theory intersect with computer science?

>> No.3569623

>>3569555
>30 years old
>2300 SAT score

So you took the SATs after age 25?

>> No.3569641

>>3569623
Yes. when I was 27 actually. The score is embarrassing though.

>> No.3569691

Alright guys it's been fun but I gotta go. I hope I've helped a little.

To this>>3569494 guy, I don't know if you're talking about an undergrad project, but you can easily dive into theoretical computer science for grad study. You will probably find that very interesting.

>> No.3569702

I'm trying to get heavy into statistics, but learning it is unlike other math in that it seems to be a lot of memorization. Is there a better/good way to learn stats?

>> No.3570505

Recently I've been interested in numerical systems, things like base 8 or 13 rather than base ten, ect.

Have you done any study in this feild? If so what numerical system do you consider to be "most pure", can you recommend any books for someone with a casual intrest in it?

>> No.3570543

>>3569691

Before you go, please answer this question:

How hard was it to get into U of C? I'm trying to graduate magna cum laude, but is it still possible to get in with those honors? U of C is my top reach dream school.

>> No.3570549

>>3569235

Math senior undergrad here;

Where can I publish something? I've never published before but I think I have something decent in number theory. Nothing special, but it's worth showing I think.

>> No.3570554
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3570554

Took 11 posts to reference the 300K meme?!?!

/sci/ I am disappoint.

>> No.3570557

>>3570549
OK, I'll answer one more. Just post your ideas here and I'll help you publish them.

>> No.3570564

>>3570554
>y u no spout memes
Get the fuck out and go back to /b/.

>> No.3570571

why did he take the SAT when he was 27? this thread is bullshit. why would you lie about being a math phd? fucking faggot.

>> No.3570572
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3570572

>>3570564

Oh look, an aspie who thinks this isn't a troll board.

How's my little aspie?!? You're so good! YES YOU ARE!

>> No.3570584
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3570584

>>3570572
I am so trolled. This is how trolled I am. Pic related.

>> No.3570595
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3570595

Does 1=0.999.... ?

Serious question, no troll. I understand it does in the number system most of us use throughout high school and early college, but I heard when hyperreal numbers get involved they can be considered non-equal. Or something like that...

>> No.3570600

>>3570595
The only math you've ever dealt with is about real numbers, or maybe complex numbers (of which the real numbers are subset). In those contexts, the notation being used unambiguously means that 1 = 0.999...

As for other systems where the notation doesn't have the same meaning anymore,
http://en.wikipedia.org/wiki/0.999...#In_alternative_number_systems