basic constructions:
strong axioms
further
This page collects material related to
Bertrand Russell, Alfred Whitehead
Principia Mathematica
1910
an early account aiming to lay foundations of mathematics.
Among other things, this book, inspired by work of Gottlob Frege, introduces concepts of typing, called the “extensional hierarchy of type” to prevent paradoxes of set theory such as Russell's paradox, and a “ramified hierarchy of types”, in order to avoid paradoxes such as the liar's paradox. (See also SEP – Type theory).
Last revised on July 22, 2016 at 14:23:27. See the history of this page for a list of all contributions to it.