h.curnf

来自「强大的数学工具包」· CURNF 代码 · 共 31 行

                               * * * * * * *
                               *   curnf   *
                               * * * * * * *

        "current number field"
        SYNTAX: X = curnf(Y,P)

        Y is a variable.
        P is an expression whose value is a univariate irreducible 
        polynomial of degree greater than 1 in the variable Y.

        curnf specifies the current number field K = Q(al) where al
        is a root of P, i.e. K is isomorphic to Q[Y]/(P(Y)).
        All algebraic numbers are considered as elements of this 
        field K. They are entered and displayed by the symbol 'NF'
        as polynomials in the variable Y.
        P is stored in the variable curNumberField.
        X is assigned the value of P.


        Example 1: (correct)

                P = curnf(A, A^6 + A^3 + 3*A + 2)


        Example 2: (incorrect)

                curnf(Y, Y^6 + Y^3 + 3*Y + 3)

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