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Questions involving the software MAGMA. (For the algebraic structure called magma, please, use the tag magmas.) This tag should hardly ever be the only tag of a question; typically there should be additional tags to indicate the mathematical content of the question. Please note that questions that are purely support-questions on MAGMA are not a good fit for this site.

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Compute corestriction map on group cohomology in Magma

I based my quick answer (see comments above) on https://magma.maths.usyd.edu.au/magma/handbook/text/814 which states: Cocycles Before invoking the functions in this section, it is necessary to first invoke … These relations are consistent with the Magma convention of the use of right actions, and so they are slightly different from those encountered in many textbooks, where left actions are more common. 0- …
Kasper Andersen's user avatar