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| KASH3 Reference Manual
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| ### Function MatrixRing ( alg^mat A, fld^fin E ) -> alg^mat, map() ### Optional Arguments
Results | elt-ord^rat |  | 1 <= Results <= 2
### Description Given a matrix algebra A over the finite field F and a subfield E of F, return the matrix algebra N over E obtained from A by expanding each component of an element of A into the block matrix associated with it (i.e. so N is A considered as an E-matrix algebra), together with the E-isomorphism from A onto N.
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