Russell
1.2.3.1 Photo
1.2.3.2 Background
1.2.3.3 Principia mathematica
1.2.3.3.1 1+1=2 page
1.2.3.3.2 ???
1.2.3.4 Russel's Paradox
1.2.3.5 Russel's Definition of Mathematics
1.2.3.6 The Logical Scool
