About Petr Hájek
Petr Hájek (Czech pronunciation: [ˈpɛtr̩ ˈɦaːjɛk]; 6 February 1940 – 26 December 2016) was a Czech scientist in the area of mathematical logic and a professor of mathematics. Born in Prague, he worked at the Institute of Computer Science at the Academy of Sciences of the Czech Republic and as a lecturer at the faculty of mathematics and physics at the Charles University in Prague and at the Faculty of Nuclear Sciences and Physical Engineering of the Czech Technical University in Prague. Petr Hájek (Czech pronunciation:; 6 February 1940 – 26 December 2016) was a Czech scientist in the area of mathematical logic and a professor of mathematics. Hájek, Petr; Havránek, Tomáš; Chytil, Metoděj K. (1983). Influenced by Petr Vopěnka, he specialized in set theory and arithmetic, and later also in logic and artificial intelligence.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.