What fonts are used on this site, for text and mathematics. It looks like Computer Modern, but it seems less "thin" and "spindly" than usual, which I like. Maybe someone fattened up the shapes, or the hinting is very good, or something ?
There was another question asking the same thing, and the answer was "Georgia", but I don't know if that refers to the text font, the math font, or both.
Georgia is used for the text in posts, but not for all text: for example, "Related" links to the right are in Helvetica Neue. The font in the formulas is identified as MathJax_Math, which is probably not very helpful to you.
Most modern browsers have a built-in (or easily added) developer tool (usually launched by pressing F12) which allows you to inspect any element of any webpage and learn everything you want about the fonts, images, scripts, etc.
