A polynomial function representing Logical OR Is there a way to represent logical OR function of two or more variables as a polynomial/value function.
So that the $f(x,y)>0$ if $\text{OR}(x,y)>0$. 
Additional Edit: Considering $\geqslant 0$ means TRUE, and $<0$ means FALSE. For both the variables and the function. i.e in case $x>0$ and $y<0$, $\text{OR}(x,y)>0$ but $f(x,y)$ might depend on the relative magnitudes of $x$ and $y$. 

The polynomial $f(x,y) = x + xy + y \mod 2$ works.
