Origins of the calculus of binary relations
Vaughan Pratt · 2003
The genesis of the calculus of binary relations, which was introduced by A. De Morgan (1860) and was subsequently greatly developed by C.S. Peirce (1933) and E. Schroder (1895), is examined. Its further development, from the perspective of modern model theory, in the 1940s and 1950s is described.>