Person: Petryshyn, Volodymyr
Volodymyr Petryshyn is a Ukranian mathematician who worked in functional analysis. He killed his wife while suffering from a mental breakdown.
Mathematical Profile (Excerpt):
- His parents were Vasyl and Maria Petryshyn.
- After completing his doctorate, Petryshyn was appointed as a postdoctoral fellow at New York University.
- Petryshyn's main work has been in iterative and projective methods, fixed point theorems, nonlinear Friedrichs extension, approximation-proper mapping theorem, and topological degree and index theories for multi-valued condensing maps.
- Petryshyn received several significant honours for his excellent mathematical contributions.
Born 22 January 1929, Liashky Murovani, Lwów, Poland (now Murovane, Lviv, Ukraine).
View full biography at MacTutor
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Origin Ukraine
Thank you to the contributors under CC BY-SA 4.0! 
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- non-Github:
- @J-J-O'Connor
- @E-F-Robertson
References
Adapted from other CC BY-SA 4.0 Sources:
- O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive
