KASH3 Ref - Root

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| ### Function Root ( elt-ord^pad x, elt-ord^rat n ) -> elt-ord^pad ### Description An n-th root of x, if it exists (error otherwise). ### Examples x_z5 := pAdicRing(5,20); x_R := UnramifiedExtension(x_z5,3); x_r :=x_R.1^2 + 4*x_R.1 + 4; Root(x_r, 2);
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