Singular Manual: allreal

| #### D.12.8.9 allreal Procedure from library `rootsur.lib` (see rootsur_lib). Usage: allreal(p); Return: int: 1 if and only if all the roots of p are real, 0 otherwise Example:
    LIB "rootsur.lib";
    ring r = 0,x,dp;
    poly p = (x+2)*(x-1)*(x-5);
    allreal(p);
    ==> 1
    p = p*(x2+1);
    allreal(p);
    ==> 0
See also: allrealst.

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