1. He conducted research in the field of theory of functions . 2. But such functions can exist in a suitably modern theory of functions . 3. Craig and Simon Newcomb read Leo K�nigsberger's " Theory of Functions " also. 4. Later he applied methods from the metric theory of functions to problems in probability theory and number theory. 5. He is famous for his contributions to algebraic geometry and the theory of functions of several complex variables. 6. His early work pertained to the theory of functions of a complex variable, particularly, complex dynamics. 7. In 1945 he began to teach analysis, theory of functions , calculus and rational mechanics in Pisa. 8. In 1974 A . Gvishiani defended his PhD thesis devoted to the theory of functions and functional analysis. 9. At that time Klein was dealing with deep problems of algebra and theory of functions of a complex variable. 10. In 1933, Naimark began graduate studies at Odessa State University in the Department of the Theory of Functions .
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