Walter Helbig Gottschalk (1918–2004) was an American mathematician, one of the founders of topological dynamics.
Gottschalk was born in Lynchburg, Virginia, on November 3, 1918, and moved to Salem, Virginia as a child. His father, Carl Gottschalk, was a German immigrant who worked as a machinist and later owned several small businesses in Salem; his younger brother, Carl W. Gottschalk, became a notable medical researcher.
Gottschalk did both his undergraduate studies and graduate studies at the University of Virginia, finishing with a Ph.D. in 1944 under the supervision of Gustav A. Hedlund. After graduating, he joined the faculty of the University of Pennsylvania, and was chair of the Pennsylvania mathematics department from 1954 to 1958. In the academic year 1947/1948 he was a visiting scholar at the Institute for Advanced Study. At Pennsylvania, his students included Philip Rabinowitz, known for his work in numerical analysis. Gottschalk moved to Wesleyan University in 1963; at Wesleyan, he also served two terms as chair before retiring in 1982. He died on February 15, 2004, in Providence, Rhode Island, where he had lived since his retirement.
Gottschalk and his advisor Gustav Hedlund wrote the 1955 monograph Topological Dynamics. Other research contributions of Gottschalk include the first study of surjunctive groups and a short proof of the De Bruijn–Erdős theorem on coloring infinite graphs.
As well as being a research mathematician, Gottschalk also put on two exhibits of mathematical sculptures in the 1960s.
Awards and honors
Gottschalk was a fellow of the American Association for the Advancement of Science.
- Gottschalk, W. H. (1951), "Choice functions and Tychonoff's theorem", Proceedings of the American Mathematical Society 2: 172, doi:10.2307/2032641, MR 0040376.
- Gottschalk, Walter Helbig; Hedlund, Gustav Arnold (1955), Topological dynamics, American Mathematical Society Colloquium Publications 36, Providence, R. I.: American Mathematical Society, MR 0074810.
- Gottschalk, Walter (1973), "Some general dynamical notions", Recent Advances in Topological Dynamics (Proc. Conf. Topological Dynamics, Yale Univ., New Haven, Conn., 1972; in honor of Gustav Arnold Hedlund), Lecture Notes in Math. 318, Berlin, New York: Springer-Verlag, pp. 120–125, doi:10.1007/BFb0061728, MR 0407821.
- About the author, Gottschalk's Gestalts, retrieved 2012-11-21.
- Walter H. Gottschalk, Salem Educational Foundation and Alumni Association Hall of Fame, retrieved 2012-11-21.
- "Carl W. Gottschalk", Biographical Memoirs of the National Academy of Sciences 77, 1999: 122–141
- Walter Helbig Gottschalk at the Mathematics Genealogy Project
- Tenured faculty 1899– and Past department chairs, Univ. of Pennsylvania Dept. of Mathematics, retrieved 2012-11-21.
- Gottschalk, Walter H., Institute for Advanced Study
- Review of Topological Dynamics by Y. N. Dowker, MR 0074810.
- Halmos, Paul R. (1955), "Book Review: W. H. Gottschalk and G. A. Hedlund, Topological dynamics", Bulletin of the American Mathematical Society 61 (6): 584–588, doi:10.1090/S0002-9904-1955-09999-3, MR 1565733.
- Gottschalk (1973).
- Gottschalk (1951).