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Results tagged with descent
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user 39304
9
votes
Descent a representation over finite field
to be trivial, that is there is an element $B\in PGL_n(L)$ such that $A(\sigma)=\sigma(B)B^{-1}$, then $B^{-1}\rho B$ is a representation invariant under all the elements $\sigma$ and is the desired descent …
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