[math-fun] The word "stathm"

We were taught in Algebra that a stathm is a function on a ring that can be used like absolute value on the integers to prove the Euclidean algorithm. It's in some math books, but I can't find it in any dictionary, not even the OED. Does anyone know of any dictionary where this word appears? --Dan _____________________________________________________________________ "It don't mean a thing if it ain't got that certain je ne sais quoi." --Peter Schickele