Tomoyoshi Ibukiyama

collaborators

3 papers

math.NT2023

Period of the Ikeda-Miyawaki lift

Tomoyoshi Ibukiyama, Hidenori Katsurada, Hisashi Kojima

In this paper, first we give a weak version of Ikeda's conjecture on the period of the Ikeda-Miyawaki lift. Next, we confirm this conjecture rigorously in some cases.

math.NT2023

Genus character $L$ -functions of quadratic orders in an adelic way and maximal orders of matrix algebras

Tomoyoshi Ibukiyama

For a quadratic extension $K$ of $Q$ , we consider orders $O$ in $K$ that are not necessarily maximal and the ideal class group $C l^{+} (O)$ in the narrow sense of proper ide…

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…

Period of the Ikeda-Miyawaki lift

Genus character L-functions of quadratic orders in an adelic way and maximal orders of matrix algebras

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

Genus character $L$ -functions of quadratic orders in an adelic way and maximal orders of matrix algebras

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