ODD _ _ _ _ _ _ _ _ _ _ _ _ declaration

syntax:

This declaration is used to declare an operator odd in its first argument. Expressions involving an operator declared in this manner are transformed if the first argument contains a minus sign. Any other arguments are not affected.

examples:

        odd f; 

        f(-a) 

  -F(A) 


        f(-a,-b) 

  -F(A,-B) 


        f(a,-b) 

  F(A,-B)

If say f is declared odd, then f(0) is replaced by zero unless f is also declared non zero by the declaration nonzero.