charts -- the number of maximal affine charts

Description

The function charts returns the number of maximal cones in the underlying fan, i.e., the number of affine charts.

 i1 : E = cotangentBundle pp1ProductFan 3 o1 = {dimension of the variety => 3 } number of affine charts => 8 number of rays => 6 rank of the vector bundle => 3 o1 : ToricVectorBundleKlyachko i2 : charts E o2 = 8