A Note on Coseparable Coalgebras
classification
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keywords
coalgebracoringcoseparablecoalgebrascommutativeconsideredcounitalcounity
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Given a coalgebra $C$ over a commutative ring $R,$ we show that $C$ can be considered as a (not necessarily counital) $C^{\ast op}$-coring. Moreover, we show that this coring has a left (right) counity if and only if $C$ is coseparable as an $R$-coalgebra.
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