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3 Affine toric varieties

This chapter concerns toric commands which deal with the coordinate rings of affine toric varieties U_σ.

3.1 Ideals defining affine toric varieties

3.1-1 EmbeddingAffineToricVariety
 ‣ EmbeddingAffineToricVariety( L ) ( function )

Input: L is a list generating a cone (as in DualSemigroupGenerators).
Output: the toroidal embedding of X=Spec(I), where I is the ideal of the affine toric variety (given as a list of multinomials).

gap> phi:=EmbeddingAffineToricVariety([[1,0],[3,4]]);
[ x_2, x_1, x_1^2/x_4, x_1^3/x_4^2, x_1^4/x_4^3 ]
gap> L:=[[1,0,0],[1,1,0],[1,1,1],[1,0,1]];;
gap> phi:=EmbeddingAffineToricVariety(L);
[ x_3, x_2, x_1/x_5, x_1/x_6 ]

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