Because I'd have to forfeit my math blogger card otherwise: you should know about Math Overflow This is a site where people can ask mathematics questions -- the level is basically that of questions which would be of interest to professional...

If you google genealogy, the first hit is The mathematics genealogy project. In some sense, according to "the Internet", mathematical genealogy is more important than real genealogy! (I have a feeling that the biological parents of mathematicians...

Did you know that there are actually things to say about whether zero is even or odd (from Wikipedia)? Obviously it is, but the math-ed folks have seriously looked at this. I found this via a comment by John Thacker at The Volokh Conspiracy. There's...

Tim Gowers wrote in The Importance of Mathematics: If you were to work out what mathematical research has cost the world in the last 100 years, and then work out what the world has gained, in crude economic terms, then you would discover that the world...

Let S be the standard Smith class of normalized univalent Matcuzinski functions on the unit disc, and let B be the subclass of normalized Walquist functions. We establish a simple criterion for the non-Walquistness of a Matcuzinski function. With this...