h.elform

强大的数学工具包

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                                *   elform  *
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        "elementary divisor form"
        SYNTAX: X = elform(M, kol, kor)

        M is a nonzero matrix over Z or over univariate polynomials 
        over Z, Q or Z/pZ (where p is a prime). 
        kol and kor are 0 or 1.

        X is assigned the elementary divisor form of M.
        If kol/kor is 1, the left/right cofactor is displayed on
        the screen.

        Corresponding to kol and kor, the left and right cofactors
        are stored in AV (see "?avfunc").


        Example 1: (correct)

                elform({{1, 2, 0} {1, 5, 4}}, 1, 1)


        Example 2: (correct)

                elform({{x, 2} {1/2, 3}}, 1, 0)


        Example 3: (incorrect)

                elform({{1, 0} {0, 1}}, 1/2, -4)

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