| ##### 7.5.2.0. allPositive Procedure from library `bfun.lib` (see bfun_lib). Usage: allPositive(v); v an intvec Return: int, 1 if all components of v are positive, or 0 otherwise Purpose: check whether all components of an intvec are positive Example:
    LIB "bfun.lib";
    intvec v = 1,2,3;
    allPositive(v);
    ==> 1
    intvec w = 1,-2,3;
    allPositive(w);
    ==> 0

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