Fedir Yudin

collaborators

2 papers

math.NT2026

Square products of factorials and a conjecture of Erdős and Graham

Fedir Yudin

For $n \geq 2$ let $F (n)$ be the least $k \geq 2$ such that $n!$ is the largest factor in a product of $k$ distinct factorials that is a perfect square, and let $D_{k} (X)$ be the number of…

math.CO2024

Fine Mixed Subdivisions of a Dilated Triangle

Yuan Yao, Fedir Yudin

An upward equilateral triangle of side $n$ can be partitioned into $n$ unit upward equilateral triangles and $\frac{n ( n - 1 )}{2}$ unit rhombi with $6 0^{\circ}$ and $12 0^{\circ}$ angl…