William HaloupekMathematician -- PhD 1992University of Wisconsin-MadisonAstronomy is my hobby. Kind of an obsession at times! Not so much about where to point my telescope, but mor...view moreWilliam HaloupekMathematician -- PhD 1992University of Wisconsin-MadisonAstronomy is my hobby. Kind of an obsession at times! Not so much about where to point my telescope, but more learning about exotic places.I started out in Topology and Analysis at Texas Tech, then went to Wisconsin and switched to Applied Math. Started working on a PhD thesis in General Relativity, then changed to Dynamical Systems, and ended up with a PhD in Differentiability Theory. Studied a lot of Classical Physics.I also worked as a radar engineer in the missile defense industry for 10 years. This gave me an appreciation of the "real world."Other hobbies: genealogy, coin collecting, science fiction, philosophy, hiking.view less