Singular Manual: sturmha

| #### D.12.8.12 sturmha Procedure from library `rootsur.lib` (see rootsur_lib). Usage: sturmha(p,a,b); poly p, number a,b Return: int: the number of real roots of p in (a,b) (using a Sturm-Habicht sequence) Example:
    LIB "rootsur.lib";
    ring r = 0,x,dp;
    poly p = (x+2)*(x-1)*(x-5);
    sturmha(p,-3,6);
    ==> 3
    p = p*(x2+1);
    sturmha(p,-3,6);
    ==> 3
See also: allreal; sturm.

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