Johann Cigler's user avatar
Johann Cigler's user avatar
Johann Cigler's user avatar
Johann Cigler
  • Member for 12 years, 7 months
  • Last seen more than a month ago
14 votes

Why worry about the axiom of choice?

10 votes

Recognizing a measure whose moments are the motzkin numbers

10 votes

Mathematicians with aphantasia (inability to visualize things in one's mind)

8 votes

Why are some q-analogues more canonical than others?

8 votes

An example of a beautiful proof that would be accessible at the high school level?

8 votes

Deriving inverse of Hilbert matrix

7 votes

Nontrivial question about Fibonacci numbers?

7 votes

Are these two definitions of "uniformly distributed" equivalent?

7 votes

The half-life of a theorem, or Arnold's principle at work

7 votes
Accepted

a Hankel matrix of involution numbers

6 votes

A q-rious identity

6 votes

Sum of Gaussian binomial coefficients.

5 votes

Eigenvectors and eigenvalues of a tridiagonal Toeplitz matrix

5 votes

Identifying the generating function $ G(a,z) = \sum_{n=0}^{\infty} a^n z^{(n+1)(n+2)/2}. $

5 votes

Spread polynomials

5 votes

Experimental mathematics leading to major advances

5 votes

Probabilistic proofs of analytic facts

5 votes

Sequences equidistributed modulo 1

5 votes

The half-life of a theorem, or Arnold's principle at work

4 votes

Hankel determinants of harmonic numbers

4 votes
Accepted

Simple and general relation between continuant polynomials

3 votes

Recursions which define polynomials

3 votes

Bivariate polynomials with special properties

3 votes

Find the inverse of a matrix that is very similar to the Hilbert matrix

3 votes

Looking for a "cute" justification for a Catalan-type generating function

3 votes
Accepted

notation for $(a-b)(a-qb)\dots (a-q^{n-1}b)$

3 votes
Accepted

Sequence problem find its character

3 votes

One generating function, two-fold sums

2 votes

Insightful books about elementary mathematics

2 votes

The complex trigonometric function degenerates to the positive integer