'The "theory" of membership in these, also called classes, is part of mathematics as well as logic'
Sets
LOGIC: The theory of membership in these, also called classes, is part of mathematics as well as logic
The "theory" of membership in these, also called classes, is part of mathematics as well as logic
The "theory" of membership in these, also called classes, is part of mathematics as well as logic
LOGIC
Sets
LOGIC