Incomplete hypergeometric systems associated to $1$-simplex $imes $ $(n-1)$-simplex

摘要

The A-hypergeometric system was introduced by Gel'fand, Kapranov andZelevinsky in the 1980's. Among several classes of A-hypergeometric functions,those for 1-simplex $imes$ (n-1)-simplex are known to be a very nice class.We will study an incomplete analog of this class.