Twistings and Hopf Galois Extensions
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Margaret Beattie; Blas Torrecillas
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Article
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2000
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Elsevier Science
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English
β 183 KB
## A is also an H-comodule algebra, where the product ) is defined by a) b s Ε½ . Γa a m b . In this note, we observe that there is a map of pointed sets from the 0 1 twistings of A to the H-measurings from A co H to A and study the set of twistings that map to the trivial measuring. If ArA co H is