2 papers
math.GT2022
Betti numbers and torsions in homology groups of double coverings
Suguru Ishibashi, Sakumi Sugawara, Masahiko Yoshinaga
Papadima and Suciu proved an inequality between the ranks of the cohomology groups of the Aomoto complex with finite field coefficients and the twisted cohomology groups, and conje…
math.CO2020
Finite record sets of chip-firing games
Kentaro Akasaka, Suguru Ishibashi, Masahiko Yoshinaga
A finite graph with an assignment of non-negative integers to vertices gives chip-firing games. Chip-firing games determine languages (sets of words) called the record sets of lega…