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- W2950559137 abstract "We classify gradings on matrix algebras by a finite abelian group. A grading is called good if all elementary matrices are homogeneous. For cyclic groups, all gradings on a matrix algebra over an algebraically closed field are good. We can count the number of good gradings by a cyclic group. Using descent theory, we classify non-good gradings on a matrix algebra that become good after a base extension." @default.
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- W2950559137 date "2001-07-20" @default.
- W2950559137 modified "2023-10-17" @default.
- W2950559137 title "On gradings of matrix algebras and descent theory" @default.
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