T. Ibukiyama

activity

19972026

most citedEisenstein congruences for SO(4,3), SO(4,4), spinor and triple product L-values

2 citations · 3 across the 10 of their papers we have counts for

collaborators

Showing 2022Show all

3 papers · 1 filter

math.NT2022

Dimensions of paramodular forms and compact twist modular forms with involutions

Tomoyoshi Ibukiyama

We give an explicit dimension formula for paramodular forms of degree two of prime level with plus or minus sign of the Atkin--Lehner involution of weight $\det^k\operatorname{Sym}…

math.AG2022

Differentiating Siegel modular forms, and the moving slope of $A_{g}$

Samuel Grushevsky, Tomoyoshi Ibukiyama, Gabriele Mondello +1

We study the cone of moving divisors on the moduli space $A_{g}$ of principally polarized abelian varieties. Partly motivated by the generalized Rankin-Cohen bracket, we c…

math.NT2022

When is a polarised abelian variety determined by its $p$ -divisible group?

Tomoyoshi Ibukiyama, Valentijn Karemaker, Chia-Fu Yu

We study the Siegel modular variety $A_{g} \otimes F_{p}$ of genus $g$ and its supersingular locus $S_{g}$ . As our main result we determine precis…

Dimensions of paramodular forms and compact twist modular forms with involutions

Differentiating Siegel modular forms, and the moving slope of Ag​

When is a polarised abelian variety determined by its p-divisible group?

Differentiating Siegel modular forms, and the moving slope of $A_{g}$

When is a polarised abelian variety determined by its $p$ -divisible group?