Alyosha

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19 Favorites

added views newest activity votes

14

40

votes

1

answer

564

views

Manual proof that ${\left(\pi^\pi\right)}^{\pi^\pi}$ is a noninteger

numerical-methods arithmetic

1d ago A Walker 2,946

3

4

votes

2

answers

111

views

For what $n$ and $m$ is this number a perfect square?

elementary-number-theory square-numbers

may 20 at 15:07 Tito Piezas III 2,665

2

4

votes

1

answer

52

views

Evaluating $\int_0^{\infty}e^{-\alpha x^2 \cos \beta} \cos(\alpha x^2 \sin \beta) dx$

complex-analysis

may 19 at 21:26 Ron Gordon 26.6k

1

4

votes

0

answers

50

views

$f(a+b,\lambda) = f (a,\lambda) \cdot f(b,\lambda)$

real-analysis functional-analysis functional-equations

may 13 at 14:42 MJD 21.1k

1

10

votes

0

answers

72

views

Show that $h \equiv 1 \pmod p$, where $h$ is the number of subgroups of order $p$ and $p$ divides the group order.

abstract-algebra group-theory group-actions

may 9 at 21:58 Jeroen 484

5

12

votes

0

answers

168

views

Any proof to $\pi^{e}$'s irrationality?

number-theory reference-request irrational-numbers pi open-problem

may 8 at 17:54 zach 765

1

3

votes

0

answers

79

views

Square and reverse reading of an integer

arithmetic

may 2 at 18:16 francis-jamet 1,260

3

18

votes

4

answers

105

views

Ways to fill a $n\times n$ square with $1\times 1$ squares and $1\times 2$ rectangles

combinatorics geometry problem-solving

apr 11 at 22:44 Aryabhata 47.7k

6

8

votes

4

answers

292

views

Seating of $n$ people with tickets into $n+k$ chairs with 1st person taking a random seat

probability

mar 20 at 6:48 Stefan Babos 166

11

22

votes

1

answer

1

kviews

Why isn't the 3 body problem solvable?

differential-equations dynamical-systems classical-mechanics chaotic-systems

mar 18 at 17:27 Jamahl Peavey 39

3

10

votes

2

answers

222

views

When is $(2^a-1)$ a power of 3

number-theory

feb 20 at 15:49 anon 40.2k

2

6

votes

2

answers

1

kviews

How many distinct n-letter “words” can be formed from a set of k letters where some of the letters are repeated?

probability combinatorics

feb 10 at 7:12 Community♦ 1

17

39

votes

4

answers

824

views

Combinatorics Problem: Box Riddle

combinatorics logic

jan 29 at 22:41 leonbloy 12.2k

2

6

votes

1

answer

106

views

how prove that $|f(x)|\ge2^n (n+1) $ under these conditions?

analysis integral

jan 28 at 22:00 Matemáticos Chibchas 1,554

1

4

votes

1

answer

68

views

Is there a statistical interpretation of Green's theorem, Stokes' theorem, or the divergence theorem?

probability multivariable-calculus

jan 28 at 20:42 Muphrid 3,439

1

2

votes

0

answers

64

views

Condition so that $y''+p(x)y'+q(x)y=0$ can be converted in a ODE with constant coefficients

calculus differential-equations

jan 26 at 9:06 tim_a 129

4

10

votes

1

answer

357

views

Can the real and imaginary parts of $\dfrac{\sin z}z$ be simplified?

complex-analysis trigonometry hyperbolic-functions

dec 1 at 1:12 Antonio Vargas 6,733

12

41

votes

3

answers

739

views

Alice and Bob matrix problem.

combinatorics matrices

oct 30 at 18:52 dineshdileep 2,151

6

29

votes

2

answers

1

kviews

Small primes attract large primes

number-theory reference-request prime-numbers analytic-number-theory

sep 24 at 16:25 user42520 26

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