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CorrespondenceScrolls :: carpet

carpet -- ideal of a K3 carpet

Synopsis

Description

the K3 carpet of type b1,b2 is the correspondence scroll of type b1,b2 with respect to the ideal Delta2, where Delta ⊂P1 x P1 is the ideal of the diagonal.

i1 : betti res carpet{1,3}

            0 1 2 3
o1 = total: 1 5 5 1
         0: 1 . . .
         1: . 3 2 .
         2: . 2 3 .
         3: . . . 1

o1 : BettiTally

See also

Ways to use carpet :