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IsZero

Syntax

IsZero(X:OBJECT):BOOL
    

Summary

test whether an object is zero

Description

This function tests whether its argument is zero; the argument can be of almost any type for which zero makes sense.

example

    
IsZero(23);
FALSE
-------------------------------
IsZero(3-3);
TRUE
-------------------------------
Use R ::= Q[x,y];
IsZero(x^2+3y-1);
FALSE
-------------------------------
IsZero(Ideal(x^2,xy^3));
FALSE
-------------------------------
IsZero(Vector(0,0,0));
TRUE
-------------------------------
        
    

See Also