Cohen-Macaulayness of semi-invariants for tori

Van den Bergh, Michel

doi:10.1090/S0002-9947-1993-1087057-3

Cohen-Macaulayness of semi-invariants for tori
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Trans. Amer. Math. Soc. 336 (1993), 557-580 Request permission

Abstract:

In this paper we give a new method, in terms of one-parameter subgroups, to study semi-invariants for algebraic tori. In some cases we obtain extensions to results in [7]. In other cases we obtain different proofs.

References

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Cohen-Macaulayness of modules of covariants