The Journal of Symbolic Logic, Vol. 3, No. 4, Including an Update to A Bibliography of Symbolic Logic (Dec., 1938), pp. 150-155 (6 pages) ...

I have a mathematical tattoo on my left forearm. It’s in Frege’s notation (from “Grundgesetze der Arithmetik”), which was one of the first modern logical notations. If it were written on a flat ...