Person: Specker, Ernst Paul
Ernst Specker was a Swiss mathematician who made decisive contributions towards shaping directions in topology, algebra, mathematical logic, combinatorics and algorithms.
Mathematical Profile (Excerpt):
 Ernst attended kindergarten in Zürich.
 Ernst was happy at this school but his health broke down when he contracted tuberculosis after beginning secondary school.
 Specker passed his university entrance examinations in the autumn of 1940.
 Specker's parents were rather unhappy about this but in the end they consented.
 From 1945 to 1948 Specker was employed as an assistant at ETH, working first for Saxer, then for Hopf and Plancherel.
 He attended Bernays' seminar on Axiomatics and Logistics and one of the topics studied led to Specker's paper Nicht konstruktiv beweisbare Sätze der Analysis Ⓣ(Nonconstructivelyprovable theorems of analysis) (1949).
 Roman Sikorski also attended the seminar and interaction with him led to Specker's paper Sur un problème de Sikorski Ⓣ(On a problem of Sikorski) (1949).
 We noted above that Specker was crippled by the illness he had suffered.
 Specker returned to ETH for session 195051 when he substituted for Hopf in teaching a course on linear algebra.
 In 1987 Specker gave his farewell lecture at the ETH Zürich Postmoderne Mathematik: Abschied vom Paradies?.
Born 11 February 1920, Zürich, Switzerland. Died 10 December 2011, Zürich, Switzerland.
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References
Adapted from other CC BYSA 4.0 Sources:
 O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive