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D.6.16.1 KSker
Procedure from library kskernel.lib (see kskernel_lib).
- Usage:
- KSker(int p,q); p,q relatively prime integers
- Return:
- nothing; exports ring KSring, matrix KSkernel and list 'weights';
KSkernel is a matrix of coefficients of the
generators of the kernel of Kodaira-Spencer map,
'weights' is a list of degrees for variables T
Example:
| | LIB "kskernel.lib";
int p=6;
int q=7;
KSker(p,q);
setring Kskernel::KSring;
print(KSkernel);
==> 0, 0, 0, 0, 0, 2*T(1),
==> 0, 0, 0, 0, 0, 3*T(2),
==> 0, 0, 0, 0, 0, 4*T(3),
==> 0, 0, 0, 2*T(1), 3*T(2), 9*T(4),
==> 0, 0, 0, 3*T(2), KSkernel[5,5],10*T(5),
==> 2*T(1),3*T(2),KSkernel[6,3],KSkernel[6,4],KSkernel[6,5],16*T(6)
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