h.isptec

来自「强大的数学工具包」· ISPTEC 代码 · 共 32 行

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                               *  isptec   *
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        "is point on elliptic curve ?"
        SYNTAX: X = isptec(E, P)

        E is an expression whose value is an elliptic curve over Q,
        Z/pZ (where p is a prime), GF(2^n) or a number field.
        P is an expression whose value is a projective or affine point
        over Q, Z/pZ, GF(2^n) or a number field.

        If P is a point on E, then 'Yes!' is displayed on the
        screen and X = 1; otherwise 'No!' is displayed and X = 0.


        Example 1: (correct)

                isptec(EC(8, 9), PT(0, 3))


        Example 2: (correct)

                isptec(EC(MOD(8), 9), MOD(PT(0, 3)))


        Example 3: (incorrect)

                isptec(O)

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