# All Questions

118,610 questions
Filter by
Sorted by
Tagged with
5 views

### Question on an analytic number theory paper

My question is just a I don't understand what goes on in X of paper Y" so I don't know if I can post it; on the other hand it is research. I posted it in stackexchange but it received no ...
17 views

### Can factorization of very large numbers be aided by associating them with a series (described below) of quadratic polynomials?

My name is J. Calvin Smith. I graduated in 1979 with a Bachelor of Arts in Mathematics from Georgia College in Milledgeville, Georgia. My Federal career (1979-2012) in the US Department of Defense led ...
11 views

### Proving the number of coplanar subgraphs of a hypercube

Given an n-dimensional hypercube, join each vertex to obtain a complete graph. Then the number of subgraphs of four coplanar vertices is given by $6^n/8 -4^{n-1} +2^{n-3}$ Example: a 2D square has ...
20 views

### Notation for the regular and the adjoint representation of a finite group, in particular the symmetric group

The (left) regular representation of a finite group $G$ is theThe (left) regular representation of a finite group $G$ is the action on itself by left multiplication, $g\cdot h = gh$. The adjoint ...
19 views

130 views

### If cohomology theory corresponds to intersection theory, valuation theory corresponds to -?

This is a meta question I asked myself. Cohomology theory is dual to an intersection theory. Is there anything valuation theory corresponds to in general? For instance, McMullen's polytope algebra is ...
I am looking for examples of normal complex spaces $X$ which locally around a singular point are homeomorphic to a smooth complex manifold. The only example I know is a curve with a cusp, but this is ...
I am interested in solving the following quadratic equation: $$x^{\top} A x = \sqrt{x^{\top} B x}$$ Here, $x \in \mathbb{R^q}$ is an unknown vector, and A and B are two q$\times$q-dimensional ...