| #### D.2.12.17 hasNumericCoeffs Procedure from library `ring.lib` (see ring_lib). Usage: hasNumericCoeffs ( rng ); Return: 1 if rng has inexact coefficcients, 0 otherwise. Example:
    LIB "ring.lib";
    ring r1 = integer,x,dp;
    hasNumericCoeffs(r1);
    ==> 0
    ring r2 = complex,x,dp;
    hasNumericCoeffs(r2);
    ==> 1

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