This site is too cold and unwelcoming. I think I will only use it sparingly. Here is my bio:

I like to answer more introductory questions, especially about basic calculus. The issues are usually more subtle.

I also enjoy enumerative combinatorics (counting). My master's thesis dealt with abelian difference sets, their uses and constructions, existence proofs, and such. I may do my doctorate someday, but we shall see. I am tired and old, and I do not like formal academia very much.

I do like jazz, my dog, and my wife. That is not an ordered list.