KASH3 Ref - IsIsomorphic

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| ### Function IsIsomorphic ( grp^abl G, grp^abl H ) -> elt-alg^boo, map() ### Optional Arguments
Results | elt-ord^rat |  | 1 <= Results <= 2
### Description True and a map from G to H if G and H are isomorphic; otherwise false. ### Examples x_g := AbelianGroup([2,5]);; x_h1 := FreeAbelianGroup(2);; x_h2 := Sub(x_h1,5*x_h1.1,2*x_h1.2);; x_h := Quotient(x_h1,x_h2);; IsIsomorphic(x_g,x_h);
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