Karel Hrbáček

Karel Hrbáček (born 1944) is professor emeritus of mathematics at City College of New York. He specializes in mathematical logic, set theory, and non-standard analysis.

• Hrbacek, Karel; Jech, Thomas. Introduction to set theory. Third edition. Monographs and Textbooks in Pure and Applied Mathematics, 220. Marcel Dekker, Inc., New York, 1999. xii+291 pp. ISBN 0-8247-7915-0
• Hrbáček, Karel. Axiomatic foundations for nonstandard analysis. Fund. Math. 98 (1978), no. 1, 1–19.
• Ballard, David; Hrbáček, Karel. Standard foundations for nonstandard analysis. J. Symbolic Logic 57 (1992), no. 2, 741–748.
• Hrbacek, Karel. Nonstandard set theory. Amer. Math. Monthly 86 (1979), no. 8, 659–677.

• Rota, Gian-Carlo (1978), "Review of Introduction to set theory", Advances in Mathematics, 29 (3): 397, doi:10.1016/0001-8708(78)90023-3 
• L. Gillman, Review of Introduction to set theory, MR0491188.
• J. M. Henle (1985), Review of Introduction to set theory, 2nd ed., MR0758796.