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17h
reviewed No Action Needed All non-split Cartan subroups of $GL_2(\mathbb{Z}/n\mathbb{Z})$ are conjugate
17h
reviewed Close For a non-convex function f, how to find a function g such that $g\circ f$ is strictly convex?
2d
comment Which classes of geometric results or problems can not be achieved by algebraic methods
I think the question is too broad and vague. What would constitute an answer to this question? What is "algebra" and "geometry" rigorously speaking? I vote to close.
2d
reviewed Leave Closed Minimum number of real multiplications to multiply two quaternions
2d
reviewed Looks OK Animating a unitary transform
2d
reviewed Close Animating a unitary transform
Apr
20
reviewed Close Reference request: Topological space of polygonal chains and its properties
Mar
28
reviewed Close About structure of the set of perfect matchings of $K_{n,n}$
Mar
28
reviewed Approve Submultiplicative matrix norm: Max Norm
Mar
8
reviewed No Action Needed Invariant measure of Euler-Maruyama Discretisation of an Ito diffusion
Mar
6
comment General four-term recurrence relations
Aren't we both wrong: according to math.upenn.edu/~wilf/AeqB.html the authors are Petkovsek, Wilf, Zeilberger.
Mar
6
comment General four-term recurrence relations
You mean Wilf--Zeilberger, right?
Feb
28
reviewed Approve Divisibility of the degree of an extension by the degree of its residual field
Feb
24
reviewed Leave Open Find a polynomial not in any ideal generated by polynomials of total degree $o(n)$
Feb
23
comment $ n $-Cats-in-a-Bed Problem: Picking $ n $ points in a given planar domain to maximize the sum of their pairwise distances
The question is unclear: how is the domain given in the input? How efficient you want your algorithm be (exact? approximate in some sense?). Also, what do you already know?
Feb
22
reviewed Leave Closed Zorn's lemma via Zermelo theorem
Feb
18
reviewed Close Stationary distribution of random walk alias solving uncountably many linear equations
Feb
18
comment Stationary distribution of random walk alias solving uncountably many linear equations
The question is more appropriate for Math.SE (as it is not a research-level question in mathematics). I would also suggest to fix the grammar and spelling to make the question easier to read.
Feb
18
reviewed Approve Uniqueness of analytic center manifold
Feb
16
comment Resources to learn about hypergraphs
I voted down since I believe that questions such as this should not be encouraged with an answer.