The Homepage of Ernst von Glasersfeld

71Glasersfeld E. von (1981) The “truth” about Pythagoras [pdf]. Problem Solving 3(5/6): 1–11. Available at http://www.vonglasersfeld.com/071
71.1German translation: Chapter 10 in 196 (1997).
71.2Reprinted as Chapter 21 in: Glanville R. & Riegler A. (eds.) (2007) The importance of being Ernst. Edition Echoraum, Vienna: 279–283.