The structure of weak coalgebra-Galois extensions

Details The structure of weak coalgebra-Galois extensions The structure of weak coalgebra-Galois extensions

2004-11-10

arxiv.org/abs/math/0411230v1

Mathematics

Quantum Algebra

27 pages, LaTeX

Scientific paper

Weak coalgebra-Galois extensions are studied. A notion of an invertible weak
entwining structure is introduced. It is proven that, within an invertible weak
entwining structure, the surjectivity of the canonical map implies bijectivity
provided the structure coalgebra C is either coseparable or projective as a
C-comodule.

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