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Questions of the kind "What's the name for a X that satisfies property Y?"

3 votes

Does the following class of functions have a name?

A linear recurrence is often said to be degenerate if the ratio of two of its characteristic roots is a root of unity. Many arithmetic results on values of linear recurrences only hold for non-degener …
Joe Silverman's user avatar
9 votes

Standard or good names for relations between maps

This terminology probably comes from the fact that if $s$ is invertible, then $\pi=s^{-1}\circ\rho\circ s$, so $\pi$ and $\rho$ are conjugate to one another. …
Joe Silverman's user avatar
46 votes

The origin(s) of the word "elliptic"

Your saying "elliptic functions are the functions on elliptic curves over $\mathbb C$" is somewhat misleading, I think. First came elliptic integrals measuring arc-length on an ellipse. These are gene …
Joe Silverman's user avatar
2 votes

Terminology for system of equations and...

In algebraic geometry, it's called a quasi-projective algebraic set, which by definition is a Zariski open subset of a Zariski closed subset of projective space. (I'm assuming you only have finitely m …