The constant polynomial 
whose coefficients are all equal to 0. The corresponding
polynomial function is the constant function
with value 0, also called the zero map. The zero polynomial
is the additive identity of the additive
group of polynomials.
The degree of the zero polynomial is undefined, but many authors conventionally set it equal to 
or 
.
In the Wolfram Language, Exponent[0,
x] returns -Infinity.
