h.sub

强大的数学工具包

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        "subtraction"

        "-" is the operator for the subtraction of elements of Z, Q, 
        R, C, Z/mZ, GF(p^n), algebraic numbers, polynomials over Z, Q, 
        Z/mZ, GF(p^n), number fields, R or C, rational functions, 
        matrices and vectors over all these structures and points on 
        the current elliptic curve.

        The operands may be either variables or expressions of the 
        same type or of different type.


        Example 1: (correct)

                (log2(123/45) - gcd(24, 76)) + 17896785235


        Example 2: (correct)

                MOD(27348927 - 234729) - MOD(234)


        Example 3: (correct)

                f = x/y - (z^2 - z - 12) - (1/7*x^3)


        Example 4: (correct)

                {{1, 2, 3} {1, 2, 4}} - {{x, y, 1} {1/2*x, y/3, 1}}


        Example 5: (correct)

                {1, 2, 3} - {x, y, 1}


        Example 6: (correct)

                {1/x, 2, 3/z} - {x/(x^2 - x*y -1/2), y, 1}


        Example 7: (correct)

                O - PT(0, 3)