His research has included model theory and non-standard analysis .
Howard Jerome Keisler ( born 3 December 1936 ) is an American mathematician , currently professor emeritus at University of Wisconsin -- Madison .
Howard Jerome Keisler 's research has included model theory and non-standard analysis .
Howard Jerome Keisler ( born 3 December 1936 ) is an American mathematician , currently professor emeritus at University of Wisconsin -- Madison .