Teaching set theory to six-year-olds as a way into mathematics, from arithmetic on, would come to be considered misguided, overcomplicating the basics and introducing jargon. Yet however radical a ...

Vol. 133, No. 1/2, Foundations of the Formal Sciences I (Oct. - Nov., 2002), pp. 237-255 (19 pages) We give an overview of recent results in ordinal analysis. Therefore, we discuss the different ...