5 papers
Power residue symbols and the exponential local-global principle
Henry Robert Thackeray
The exponential local-global principle, or Skolem conjecture, says: Suppose that \(b\) is a positive integer, and that the sequence \((u_{n})_{n = -\infty}^{\infty}\) is such that…
Each friend of 10 has at least 10 nonidentical prime factors
Henry Robert Thackeray
For each positive integer n, if the sum of the factors of n is divided by n, then the result is called the abundancy index of n. If the abundancy index of some positive integer m e…
Solution to a BCC 2022 problem
Henry Robert Thackeray
For positive integers and such that is at most , we find an explicit one-to-one correspondence between the following two sets: the set of words consisting of …
The cap set problem: Up to dimension 7
Henry Robert Thackeray
An s-cap n-flat is given by a set of s points, no three of which are on a common line, in an n-dimensional affine space over the field of three elements. The cap set problem in dim…
The cap set problem: 41-cap 5-flats
Henry Robert Thackeray
An s-cap n-flat, or an n-dimensional cap of size s, is a pair (S,F) where F is an n-dimensional affine space over Z/3Z and the size-s subset S of F contains no triple of collinear…