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періодичних видань НАН України
періодичних видань НАН України
Projectivity and flatness over the graded ring of semi-coinvariants
Репозиторій DSpace/Manakin
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Projectivity and flatness over the graded ring of semi-coinvariants
Посилання:
Projectivity and flatness over the graded ring of semi-coinvariants / T. Guedenon // Algebra and Discrete Mathematics. — 2010. — Vol. 10, № 1. — С. 43–56. — Бібліогр.: 13 назв. — англ.
Дата:
2010
Переглядів:
432
Завантажень:
134
Анотація:
Let k be a field, C a bialgebra with bijective antipode, A a right C-comodule algebra, G any subgroup of the monoid of grouplike elements of C. We give necessary and sufficient conditions for the projectivity and flatness over the graded ring of semi-coinvariants of A. When A and C are commutative and G is any subgroup of the monoid of grouplike elements of the coring A⊗C, we prove similar results for the graded ring of conormalizing elements of A.
