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JOURNALS // Matematicheskie Zametki // Archive

Mat. Zametki, 2010 Volume 88, Issue 1, Pages 3–17 (Mi mzm8797)

This article is cited in 7 papers

The Structure Theorem for Weak Module Coalgebras

Yu. Wang, L. Yu. Jang

Nanjing Agricultural University

Abstract: Let $H$ be a weak Hopf algebra, let $C$ be a weak right $H$-module coalgebra, and let $\overline C=C/C\cdot \operatorname{Ker}\operatorname{\sqcap}^{L}$. We prove a structure theorem for weak module coalgebras, namely, $C$ is isomorphic as a weak right $H$-module coalgebra to a weak smash coproduct $\overline C\times H$ defined on a $k$-space
$$ \{\Sigma c_{(0)}\otimes h_2\varepsilon(c_{(-1)}h_1)\mid c\in C,\,h\in H\} $$
if there exists a weak right $H$-module coalgebra map $\phi\colon C\to H$.

Keywords: weak Hopf algebra, weak Hopf bicomodule, weak comodule coalgebra, weak smash coproduct, weak module coalgebra.

UDC: 512.667

Received: 14.09.2008

DOI: 10.4213/mzm8797


 English version:
Mathematical Notes, 2010, 88:1, 3–15

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© Steklov Math. Inst. of RAS, 2024