Twisted GKZ hypergeometric functions and relative cohomology

Abstract

We investigate the GKZ $A$-hypergeometric $\mathcal{D}$-modules, introduced by Gel'fand, Kapranov, and Zelevinskii, arising from cyclic covers of toric varieties and find its Riemann--Hilbert partner. This extends our earlier results in arXiv:1902.01536.

23 pages. Comments are welcome!