A math guy from Finland. I lived in the US from 1986 to 1990 (grad school). A great time! So whatever English I picked up A) has an American slant, B) may gradually become anachronistic. My grammar is not to be trusted, my punctuation is ... creative, but I seem to have a relatively extensive vocabulary for a furriner.

I visit ELL.SE sporadically. Mostly to educate myself, but occasionally I see the chance to say something from the vantage point of a non-native.