Editing Herbert A. Simon (section)

==Personal life and interests==
Simon married Dorothea Pye in 1938. Their marriage lasted 63 years until his death. They had three children, Katherine, Peter, and Barbara.

From 1950 to 1955, Simon studied mathematical economics and during this time, together with [[David Hawkins (philosopher)|David Hawkins]], discovered and proved the [[Hawkins–Simon theorem]] on the "conditions for the existence of positive solution vectors for input-output matrices". He also developed theorems on near-decomposability and aggregation. Having begun to apply these theorems to organizations, by 1954 Simon determined that the best way to study problem-solving was to simulate it with computer programs, which led to his interest in computer simulation of human cognition. Founded during the 1950s, he was among the first members of the [[Society for General Systems Research]].{{citation needed|date=January 2014}}

Simon was a pianist and had a keen interest in the arts. He was a friend of [[Robert Lepper]]<ref>{{cite web|url=http://www.warhol.org/whats_on/pdfs/PR_Robert_Lepper_Artist_Teacher.pdf |title=PR_Robert_Lepper_Artist_Teacher.pdf |access-date=May 31, 2008 |url-status=bot: unknown |archive-url=https://web.archive.org/web/20060626151911/http://www.warhol.org/whats_on/pdfs/PR_Robert_Lepper_Artist_Teacher.pdf |archive-date=June 26, 2006 }}</ref> and Richard Rappaport.<ref>{{cite web|url=http://search.library.cmu.edu/client/default/q$003dlepper$0026rw$003d0$0026d$003dent$00253A$00252F$00252FSD_ILS$00252F1380$00252FSD_ILS$00253A1380888$00253AILS$00253A3$00253A636$0026tt$003dDIRECT$0026|archive-url=https://archive.today/20120718221753/http://search.library.cmu.edu/client/default/q$003dlepper$0026rw$003d0$0026d$003dent$00253A$00252F$00252FSD_ILS$00252F1380$00252FSD_ILS$00253A1380888$00253AILS$00253A3$00253A636$0026tt$003dDIRECT$0026|url-status=dead|archive-date=July 18, 2012|title=Home - Carnegie Mellon University Libraries|access-date=August 8, 2015}}</ref> Rappaport also painted Simon's commissioned portrait at [[Carnegie Mellon University]].<ref name="nobel autobio" /> He was also a keen [[mountain climber]]. As a testament to his wide interests, he at one point taught an undergraduate course on the [[French Revolution]].<ref name="econ"/>

In January 2001, Simon underwent surgery at [[UPMC Presbyterian]] to remove a cancerous tumor in his abdomen. Although the surgery was successful, Simon later died from the complications that followed. His wife died a year later in 2002.<ref name=DorotheaSObit/>