mgkz

[A w b] gkz [eq v]
[    ] gkz [eq v]
array of array of integer A; array of integer w, b;
eq is the modified GKZ system defined by the matrix A, weight w, 
and the parameter b.
v is the list of variables. The last variable is the deformation variable.
Default values of A and b are in gkz.A and gkz.b
For details, see the paper Modified A-hypergeometric system, N.Takayama
http://arxiv.org/abs/0707.0043
Example : [ [[1 2 3]] [1 2 1] [0]] mgkz rank :: 
Example : [ [[1 2 3]] [0]] gkz rank :: 
Example : [ [[1 1 1] [1 2 3]] [1 2 1] [1 0]] mgkz message



Nobuki Takayama 2020-11-24