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grading(PolynomialRing) -- The coker grading of a polynomial ring.

Synopsis

Description

Returns the small torus grading (coker grading) of R , i.e., the grading added to R by addCokerGrading.
i1 : R=QQ[x_0..x_4];
i2 : addCokerGrading(R);

              5        4
o2 : Matrix ZZ  <--- ZZ
i3 : grading R

o3 = | -1 -1 -1 -1 |
     | 1  0  0  0  |
     | 0  1  0  0  |
     | 0  0  1  0  |
     | 0  0  0  1  |

              5        4
o3 : Matrix ZZ  <--- ZZ

See also