| #### D.5.6.4 isLocalizationRegular Procedure from library `graal.lib` (see graal_lib). Usage: isLocalizationRegular(def L); L ideal or graalBearer Return: int, 1 if the localization A_L of A at L is regular, 0 otherwise. Example:
    LIB "graal.lib";
    ring Q = 0,(X(1),X(2)),dp;
    ideal H = X(2)^2-(X(1)-1)*X(1)*(X(1)+1);
    ideal J = X(1),X(2);
    qring A = std(H);
    ideal L = fetch(Q,J);
    graalBearer Gr = graalMixed(L);
    isLocalizationRegular(Gr); // = 1
    ==> 1

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