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by Karel Hrbacek
Year of Award: 1980
Publication Information: The American Mathematical Monthly, vol. 86, 1979, pp. 659-677
Summary: The author describes the non-standard universe and obtains a number of standard theorems by non-standard means.
About the Author: (from The American Mathematical Monthly, vol. 86, (1979)) Karel Hrbacek studied mathematics at Charles University in Prague, Czechoslovakia, where he earned the RNDr. degree under Petr Vopӗnka for work on forcing and large cardinals. He was an Exchange Fellow at the University of California at Berkeley and a Research Associate at Rockefeller University before joining the Department of Mathematics at the City College of New York in 1971. His research interests are in set theory, related areas of logic and generalized recursion theory, and Nonstandard Analysis.