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Group rings with units torsion over the center

✍ Scribed by Gerald H. Cliff; Sudarshan K. Sehgal

Publisher: Springer
Year: 1980
Tongue: English
Weight: 405 KB
Volume: 33
Category: Article
ISSN: 0025-2611
DOI: 10.1007/bf01316973

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## Abstract We show that the bicategory whose 0‐cells are corings over rings with local units is bi‐equivalent to the bicategory of comonads in (right) unital modules whose underlying functors are right exact and preserve direct sums. A base ring extension of a coring by an adjunction is introduced