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Macaulay2 web site
SRdeformations
::
raysPPn
raysPPn -- The rays of the standard fan of projective space or weighted projective space.
Synopsis
Usage:
raysPPn(n)
Inputs:
n
,
an
integer
, positive
L
,
a
list
, with at least 2 elements and first entry 1
Outputs:
a
matrix
Description
Returns a matrix which has in its rows the rays of the standard fan of projective space of dimension n or weighted projective space with the weights L.
i1 : raysPPn(2) o1 = | -1 -1 | | 1 0 | | 0 1 | 3 2 o1 : Matrix ZZ <--- ZZ
See also
addCokerGrading
-- Stores a cokernel grading in a polynomial ring.
Ways to use
raysPPn
:
raysPPn(List)
raysPPn(ZZ)