Alfred Tarski (January 14, 1902, Warsaw, Russian-ruled Poland – October 26, 1983, Berkeley, California) was a logician and mathematician who spent four decades as a professor of mathematics at the University of California, Berkeley. A member of the interwar Warsaw School of Mathematics, and active in the USA after 1939, he wrote on topology, geometry, measure theory, mathematical logic, set theory, metamathematics, and above all, model theory, abstract algebra, … Wikipedia
The definitive Wikipedia entry for Alfred Tarski. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Alfred_Tarski
Alfred Tarski (19011983) described himself as "a mathematician (as well as a logician, and perhaps a philosopher of a sort)" (1944, p. 369). plato.stanford.edu/entries/tarski/
In 1933 the Polish logician Alfred Tarski published a paper in which he discussed the criteria that a definition of true sentence should meet, and gave examples of several such definitions for particular formal languages. plato.stanford.edu/entries/tarski-truth/