/sci/ - Science & Math

pues no importa el tipo, solo(segun las palabras de mi maestro) que sea sorprendente

alguien me puede enseñar algunos trucos de magia con matematicas, los necesito para un trabajo escolar

I've recently found a short documentary about the experiment taken in Russia.

https://www.youtube.com/watch?v=0jFGNQScRNY

Long story short russian scientist managed to turn feral foxes into domesticated ones within 10 years of selective breeding.
Does this have any relevance amongst humans and our breeding patterns?

Does it mean that theory about african animals being undomesticable is false?

>>7972217
> ivory tower

>>7639641
I think what you really want to find out is the solid angle, measured in steradians, of our vision. Note that men tend to have a wider angle of peripheral vision than women.

>>6943760

# yay Python
def my_range(start, end, step):
while start <= end:
yield start
start += step

def sequence():
yield 0
yield 1
for d_power in my_range(2, 4, 1):
d = pow(2, d_power)
for n in my_range(1, d, 2):
yield float(n)/d

if __name__ == "__main__":
for x in sequence():
print x


output:

0
1
0.25
0.75
0.125
0.375
0.625
0.875
0.0625
0.1875
0.3125
0.4375
0.5625
0.6875
0.8125
0.9375


Python source:

def my_range(start, end, step):
while start <= end:
yield start
start += step

if __name__ == "__main__":

print "0"
print "1"

d = 2
for n in my_range(1, d, 2):
print float(n)/d
d *= 2
for n in my_range(1, d, 2):
print float(n)/d
d *= 2
for n in my_range(1, d, 2):
print float(n)/d
d *= 2
for n in my_range(1, d, 2):
print float(n)/d


Output:
0
1
0.5
0.25
0.75
0.125
0.375
0.625
0.875
0.0625
0.1875
0.3125
0.4375
0.5625
0.6875
0.8125
0.9375

>>6943760
>0
>1
>0,5
1/2
>0,25
1/4
>0,75
3/4
>0,125
1/8
>0,375
3/8
>0,625
5/8
>0,875
7/8
>0,0625
1/16
>0.1875
3/16
[...3]
>0.4375
7/16
>0.5625
9/16
[...]
>0.9375
15/16

>>6928565
Neptune is a ball of gas. There is no surface on which to land.

>>6901773
in C, array[index] is equivalent to index[array]

>>6901112
That #define needs extra parentheses around each argument in the expression to prevent order-of-precedence problems durung preprocessing

#define fnt(x1,x2,x3) ((x1) * (x2) + (x3))

>>6843562
And there are about 100 trillion cells in a human body.

>>6839625
One second per second, silly.

Prolog.

Assume there is some number x s.t. 0.999... < x < 1, then we would have 0.999... < 1

But no such x exists. Therefore 0.999... = 1.

This diagram is really confusing. Why didn't you use the proper symbols for the switches? These look like batteries or capacitors.

>>6756608
"mod" is loosely defined and its behavior can vary from one compiler to another.

Compare the division algorithms in this short paper:

http://research.microsoft.com/pubs/151917/divmodnote-letter.pdf

also, possibly retaining wall stones

embankment?

Spaced repetition. Use something like Mnemosyne or Supermemo, which take the curve of forgetfulness into account.

When you've used up all the bits allocated for the mantissa in your floating-point variable.

Wolverine took the last piece of pie.

>>6725498
When one chews corn kernels, they consume the content of the shells, but the shells themselves remain intact and pass through the digestive tract intact.

>>6703394
If you draw a rectangle orthogonal to the X and Y axes, with one vertex at the origin and one vertex at (1,1), your rectangle will have an area of +1.

Flip it vertically about the X axis, the the area will be -1.

Flip it once more about the Y axis, then the area will be +1 again.