[math-fun] Linkification of A=f(bh)

It is easier to understand the theorem than the url encoding. Email readers, when presented with odd urls, can be stumped when trying to make them clickable. Using "reserved" characters (per rfc3986) in urls is asking for trouble. The equals sign and the parens are in the "reserved as delimiters" set, and it is standard procedure to "percent encode" them if they are supposed to be interpreted as ordinary characters. In my personal email code, I assume that parens are not part of a url. It is likely that the sender failed to terminate the url with whitespace and instead started a parenthetical comment after the url. This happens with "." and "," and ";" all the time. Hilarie