It's not trivial, but the module generated by the empty set is referred to by this word, and is the 
It's not trivial, but the module generated by the empty set is referred to by this word, and is the identity of modules under direct product. In a field, the object referred to by this word is the only one that does not have a multiplicative inverse. This word describes the image of the kernel of a linear transformation. The Riemann hypothesis is about the nature of numbers which output this value when input into the zeta function. When this number is taken as a polynomial, it has degree negative infinity, though other constants considered as polynomials have degree equal to this number. The y-intercept of a function is its value at this x-coordinate. For 10 points, the roots of a polynomial are where it takes on what value?