Ernst Specker

 ( 1920 Births ) 

Ernst Paul Specker (11 February 1920, Zürich – 10 December 2011, Zürich) was a Switzerland mathematician. Much of his most influential work was on Willard Van Orman Quine's New Foundations, a set theory with a universal set, but he is most famous for the Kochen–Specker theorem in quantum mechanics, showing that certain types of hidden-variable theories are impossible. He also proved the ordinal number partition relation thereby solving a problem of Paul Erdős.

Specker received his Ph.D. in 1949 from ETH Zurich,. where he remained throughout his professional career.

• Specker sequence
• Baer–Specker group

• Biography at the University of St. Andrews
• Ernst Specker (1920-2011), Martin Fürer, January 25, 2012.
• Ernst Specker: Selecta, Birkhauser, 1990.