Apparently, this user prefers to keep an air of mystery about them.
21 Are the integers closed under addition… really? Jan 10 '14
2 Intersection Number of $B = Y^2 - X^3 + X$ and $F = (X^2 + Y^2)^3 - 4X^2Y^2$ using the fact $I(P,F \cap B) = ord_P^B(F) $. Dec 5 '14