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Equivariant total ring of fractions and factoriality of rings generated by semiinvariants
Equivariant total ring of fractions and factoriality of rings generated by semiinvariants
2010/12/13
Let F be an affine flat group scheme over a commutative ring R,and S an F-algebra (an R-algebra on which F acts). We define an equivariant analogue QF (S) of the total ring of fractions Q(S) of S.It i...