KASH3 Ref - HasGNB

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| ### Function HasGNB ( res^pad R, elt-ord^rat n, elt-ord^rat t ) -> elt-alg^boo ### Description Determines whether R has an unramified extension of degree n with a Gaussian normal basis of type t.. ### Examples x_z5 := pAdicRing(5,30);x_r5 := Quotient(x_z5, 5^10); HasGNB(x_r5,2,1);
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