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- W2951346131 abstract "We study generalized comatrix coalgebras and upper triangular comatrix coalgebras, which are not only a dualization but also an extension of classical generalized matrix algebras. We use these to answer several questions on Noetherian and Artinian type notions in the theory of coalgebras, and to give complete connections between these. We also solve completely the so called finite splitting problem for coalgebras: we show that a coalgebra $C$ has the property that the rational part of every finitely generated left $C^*$-module splits off if and only if $C$ has the form $C=left(begin{array}{cc} D & M 0 & E end{array}right)$, an upper triangular matrix coalgebra, for a serial coalgebra $D$ whose Ext-quiver is a finite union of cycles, a finite dimensional coalgebra $E$ and a finite dimensional $D$-$E$-bicomodule $M$." @default.
- W2951346131 created "2019-06-27" @default.
- W2951346131 creator A5063340830 @default.
- W2951346131 date "2017-04-21" @default.
- W2951346131 modified "2023-09-28" @default.
- W2951346131 title "Triangular matrix coalgebras and applications" @default.
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