next | previous | forward | backward | up | top | index | toc | Macaulay2 web site
OldToricVectorBundles :: HH^ZZ(ToricVectorBundle,List)

HH^ZZ(ToricVectorBundle,List) -- the i-th cohomology of a toric vector bundle for a given list of degrees

Synopsis

Description

"Computes the i-th cohomology of the toric vector bundle E for a given list of degrees. For this i must be between 0 and the rank of the vector bundle. The entries of the list "L must be one column matrices each defining a point in the lattice of the fan over which E is defined

i1 : E = tangentBundle hirzebruchFan 3

o1 = {dimension of the variety => 2 }
      number of affine charts => 4
      number of rays => 4
      rank of the vector bundle => 2

o1 : ToricVectorBundleKlyachko
i2 : HH_0^E {matrix{{1},{0}},matrix{{-1},{0}}}

            1        1
o2 = {(QQ[]) , (QQ[]) }

o2 : List

See also