. Its default value is an empty list. If it is set to a list of integers it will be used as grading. This has no influence on the generators of the computed objects, but on additional data like the multiplicity or the Hilbert series. The grading may have non-positive entries, but it must give positive values for all generators.
i1 : R=ZZ/37[x,y,t];
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i2 : L={x^3, x^2*y, y^3, x*y^2};
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i3 : T=intclToricRing(allComputations=>true,L);
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i4 : T.cache#"cone"#"inv"#"hilbert series num"
o4 = 1 : (1)
o4 : Sequence
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i5 : T.cache#"cone"#"inv"#"hilbert series denom"
o5 = (1, 1)
o5 : Sequence
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i6 : T=intclToricRing(allComputations=>true,grading=>{3,2,1},L);
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i7 : T.cache#"cone"#"inv"#"hilbert series num"
o7 = (1, -1, 1)
o7 : Sequence
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i8 : T.cache#"cone"#"inv"#"hilbert series denom"
o8 = (1, 6)
o8 : Sequence
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