Speaker :
 Prof. Tomoyoshi Ibukiyama(Osaka University) 
Title :

Conjectures on Siegel modular forms of halfintegral weight and integral weight. 
Time :
 20170220 (Mon) 14:10  15:00 
Place : 
Room 201, AstroMath. Building 
Abstract: 
There is a famous correspondence by Shimura between elliptic modular forms
of integral weight and of halfintegral weight.
What happens when we take Siegel modular forms of level one of degree two?
A very concrete conjectural answer on this is a subject of the talk.
Also, we give a conjectural congruence between
Siegel modular forms of halfintegral weight, which corresponds to the one
conjectured by Harder for integral weight. 