3 papers
math.NT2021
Using Fibonacci factors to create Fibonacci pseudoprimes
Junhyun Lim, Shaunak Mashalkar, Edward F. Schaefer
Carmichael showed for sufficiently large , that has at least one prime divisor that is . For a given , we will show that a product of distinct o…
math.NT2020
Elliptic curves with Galois-stable cyclic subgroups of order 4
Carl Pomerance, Edward F. Schaefer
Infinitely many elliptic curves over have a Galois-stable cyclic subgroup of order 4. Such subgroups come in pairs, which intersect in their subgroups of order 2. Let $N_…
math.DG2015
The distance from a point to its opposite along the surface of a box
S. Michael Miller, Edward F. Schaefer
Given a point (the "spider") on a rectangular box, we would like to find the minimal distance along the surface to its opposite point (the "fly" - the reflection of the spider acro…