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CharacteristicClasses :: MultiProjCoordRing

MultiProjCoordRing -- A quick way to build the coordinate ring of a product of projective spaces

Synopsis

Description

Computes the graded coordinate ring of the ℙn1 x.... x ℙnm where n1,...,nm is the input list of dimensions. This method is used to quickly build the coordinate ring of a product of projective spaces for use in computations.

S=MultiProjCoordRing(QQ,symbol z,{1,3,3})
degrees S
R=MultiProjCoordRing {2,3}
coefficientRing R
describe R
A=ChowRing R
describe A
Segre(A,ideal random({1,1},R))

Ways to use MultiProjCoordRing :