KASH3 Ref - RepresentationMatrix

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| ### Function RepresentationMatrix ( elt-ord^num a, rng R ) -> elt-alg^mat ### Description The representation matrix of a over the field of fractions of its coefficient order or R if given, giving the linear map of multiplying by a. ### Examples x_o := MaximalOrder(X^4+5); x_a := Element(x_o,[1,2,3,4]); RepresentationMatrix(x_a, Z);
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