User Grigory M - Mathematics Stack Exchange

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	7,007 reputation	bio	website		visits	member for	2 years, 10 months
22150 badges		location	Moscow, Russia		seen	1 min ago

4

6

votes

1

answer

70

views

How to classify principal bundles over a 2 dimensional surface?

algebraic-topology fiber-bundles

1h ago Grigory M 7,007

3

8

votes

1

answer

63

views

Binary tetrahedral group and $\rm{SL}_2(\mathbb F_3)$

5h ago Grigory M 7,007

6

12

votes

6

answers

598

views

Find an expression for the $n$-th derivative of $f(x)=e^{x^2}$

calculus

11h ago Mhenni Benghorbal 14.2k

1

3

votes

0

answers

54

views

$\pi_1$ and $H_1$ of Symmetric Product of surfaces

algebraic-topology homology fundamental-groups

may 18 at 3:48 Chris Gerig 677

15

26

votes

4

answers

1

kviews

Solutions to the matrix equation $\mathbf{AB-BA=I}$ over general fields

linear-algebra matrices

may 17 at 7:06 Landscape 7,750

10

15

votes

19

answers

7

kviews

Proof for formula for sum of sequence $1+2+3+\ldots+n$?

sequences-and-series algebra-precalculus faq

may 15 at 22:32 Community♦ 1

5

18

votes

3

answers

3

kviews

Prove that this function is bounded

real-analysis functional-equations asymptotics

may 5 at 22:37 Victor Wang 141

5

7

votes

1

answer

391

views

Toward “integrals of rational functions along an algebraic curve”

calculus reference-request riemann-surfaces

apr 30 at 20:56 Matt E 58.1k

12

25

votes

4

answers

3

kviews

Nice proofs of $\zeta(4) = \pi^4/90$?

calculus number-theory sequences-and-series riemann-zeta

apr 26 at 12:56 xpaul 1,056

5

6

votes

0

answers

80

views

Visualize Fourth Homotopy Group of $S^2$

general-topology algebraic-topology homotopy-theory knot-theory fiber-bundles

apr 26 at 1:52 Michael Albanese 4,683

7

24

votes

3

answers

311

views

Is $T^1 S^5$ abstractly diffeomorphic to $S^4\times S^5$?

algebraic-topology differential-geometry

apr 25 at 18:06 Jason DeVito 14.3k

1

3

votes

0

answers

41

views

Number of composition cycles on honeycomb graph embedded on torus

graph-theory algebraic-topology mathematical-physics

apr 25 at 8:00 mapping 56

2

10

votes

2

answers

305

views

Does every Poisson bracket on a commutative algebra come from a second-order deformation?

abstract-algebra cohomology deformation-theory

apr 19 at 19:42 mt_ 4,053

1

2

votes

2

answers

177

views

Does quaternion multiplication relate to Minkowski space?

quaternions

apr 16 at 13:45 J Thomas 1

8

29

votes

2

answers

1

kviews

Identity for convolution of central binomial coefficients

combinatorics binomial-coefficients

apr 13 at 21:52 Marc van Leeuwen 23.9k

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 47.6k

1

6

votes

1

answer

65

views

Idea behind the factorization of the matrix $\operatorname{diag}(a,a^{-1})$ in algebraic K-Theory

soft-question algebraic-k-theory

apr 11 at 16:28 Sean Eberhard 2,708

2

7

votes

2

answers

237

views

Example of finitely generated subgroups whose intersection is not finitely generated

group-theory examples-counterexamples

apr 8 at 4:54 PatrickR 305

6

10

votes

1

answer

208

views

Why is Cartan Formula just an avatar of Leibniz rule?

differential-geometry

apr 7 at 20:19 Asaf Karagila 91.5k

3

6

votes

4

answers

627

views

Proving that an integer is the $n$ th power

number-theory diophantine-equations arithmetic

mar 29 at 2:14 YACP 9,190

7

18

votes

2

answers

961

views

Structure Theorem for abelian torsion groups that are not finitely generated

group-theory abelian-groups

mar 27 at 17:21 azimut 5,503

8

13

votes

1

answer

358

views

What lies beyond the Sedenions

abstract-algebra complex-numbers quaternions sedenions

mar 19 at 23:16 Dominic Michaelis 11.9k

6

7

votes

2

answers

365

views

Category-theoretic limit related to topological limit?

general-topology category-theory

mar 17 at 15:36 Damien L 3,501

7

26

votes

1

answer

564

views

A Universal Property Defining Connected Sums

general-topology reference-request

mar 9 at 2:46 Martin Brandenburg 22.9k

91

131

votes

17

answers

8

kviews

Different methods to compute $\sum\limits_{n=1}^\infty \frac{1}{n^2}$

sequences-and-series complex-analysis fourier-analysis big-list faq

mar 8 at 13:57 xpaul 1

25

53

votes

3

answers

2

kviews

Is there an integral that proves $\pi > 333/106$?

calculus real-analysis integral approximation pi

feb 25 at 15:59 Michael Hardy 48.3k

4

3

votes

1

answer

400

views

How many solutions are there to $F(n,m)=n^2+nm+m^2 = Q$?

number-theory polynomials algebraic-number-theory

feb 11 at 14:31 Eric 33.3k

6

21

votes

2

answers

792

views

The identity cannot be a commutator in a Banach algebra?

functional-analysis banach-algebras

feb 10 at 20:07 Jonas Meyer 35.1k

9

17

votes

5

answers

2

kviews

Number of ways to partition a rectangle into n sub-rectangles

combinatorics computer-science recurrence-relations

feb 1 at 13:39 Brian Sanderson 1

51

73

votes

5

answers

4

kviews

Intuition for the definition of the Gamma function?

probability-theory intuition gamma-function

jan 23 at 23:19 Victor Wang 141

Grigory M

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