Mark Wildon's user avatar
Mark Wildon's user avatar
Mark Wildon's user avatar
Mark Wildon
  • Member for 13 years, 8 months
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58 votes

Important formulas in combinatorics

44 votes
Accepted

Ramanujan's Incorrect formula

35 votes

No canonical isomorphism

31 votes

Is the matrix $\left({2m\choose 2j-i}\right)_{i,j=1}^{2m-1}$ nonsingular?

30 votes
Accepted

Proving $\sum_{k=0}^{2m}(-1)^k{\binom{2m}{k}}^3=(-1)^m\binom{2m}{m}\binom{3m}{m}$

27 votes
Accepted

Decomposing $(\mathbb C^n)^{\otimes m}$ as a representation of $S_n\times S_m$

26 votes

What are the benefits of writing vector inner products as $\langle u, v\rangle$ as opposed to $u^T v$?

23 votes
Accepted

Two equivalent irreducible representations given by integer matrices

22 votes
Accepted

Are there nice isomorphisms $\operatorname{S}^2(k^n)\cong\Lambda^2(k^{n+1})$?

21 votes

The character table of the symmetric group modulo m

20 votes
Accepted

Approximating commuting matrices by commuting diagonalizable matrices

19 votes

Which mathematical definitions should be formalised in Lean?

18 votes

Number of commuting pairs (triples, n-tuples) in GL_n(F_q) (and other groups)?

17 votes
Accepted

Invariants of Symmetric group

16 votes
Accepted

Certain signed sum over $S_n$

15 votes
Accepted

A criterion for finite abelian group to embed into a symmetric group

15 votes
Accepted

A question on invariant theory of $GL_n(\mathbb{C})$.

14 votes

Partitions-sum of divisors identity

13 votes
Accepted

Cauchy identity in three sets of variables?

13 votes
Accepted

hooks and contents: Part I

13 votes

Three involutions on the set of 6-box Young diagrams

12 votes

A strengthening of the Cauchy-Schwarz inequality

12 votes

Combinatorial identities

12 votes
Accepted

Faster formula to compute sum over partitions

12 votes

Why do we associate a graph to a ring?

11 votes

Number theory in symmetric cryptography

11 votes

Best Springer mathematics books

11 votes
Accepted

On Applications of Murnaghan Nakayama Rule

10 votes

Cosets and conjugacy classes

10 votes

Are there always more conjugacy classes in the kernel of a morphism to $Z_2$ than not?