Editing Charles Sanders Peirce (section)

=== Relational logic ===
Beginning with his first paper on the [[Charles Sanders Peirce bibliography#LOR1870|"Logic of Relatives" (1870)]], Peirce extended the [[theory of relations]] pioneered by [[Augustus De Morgan]].{{efn|Much of the mathematics of relations now taken for granted was "borrowed" from Peirce, not always with all due credit; on that and on how the young [[Bertrand Russell]], especially his ''Principles of Mathematics'' and ''[[Principia Mathematica]]'', did not do Peirce justice, see Anellis (1995).<ref name="Anellis"/>}} Beginning in 1940, [[Alfred Tarski]] and his students rediscovered aspects of Peirce's larger vision of relational logic, developing the perspective of [[relation algebra]].

Relational logic gained applications. In mathematics, it influenced the abstract analysis of [[E. H. Moore]] and the [[Lattice (order)|lattice theory]] of [[Garrett Birkhoff]]. In computer science, the [[relational model]] for [[database]]s was developed with Peircean ideas in work of [[Edgar F. Codd]], who was a doctoral student<ref>Avery, John (2003) ''Information theory and evolution'', p. 167; also Mitchell, Melanie, "[http://web.cecs.pdx.edu/~mm/MMScientificAncestry.html My Scientific Ancestry] {{Webarchive|url=https://web.archive.org/web/20141008181914/http://web.cecs.pdx.edu/~mm/MMScientificAncestry.html|date=October 8, 2014}}".</ref> of [[Arthur W. Burks]], a Peirce scholar. In economics, relational logic was used by [[Frank P. Ramsey]], [[John von Neumann]], and [[Paul Samuelson]] to study preferences and utility and by [[Kenneth J. Arrow]] in ''[[Social Choice and Individual Values]]'', following Arrow's association with Tarski at [[City College of New York]].