Oskar Perron (1880 - 1975).

One of His Greatest Works: The Perron - Frobenius Theorem.

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On 22 February 1975, the German mathematician Oskar Perron died at the age of 94 in Munich - Germany. Professor Perron was a prolific mathematician, who was noted for his significant contributions to the study of differential equations and partial differential equations. He introduced a paradox bearing his surname, which illustrates the danger of assuming the existence of solutions to a mathematical optimisation problem.

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Note: The theorem image was created by me using the text editor based on LaTeX, Beamer.

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Portrait Image Source

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References.

Weisstein, Eric W. "Perron-Frobenius Theorem." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Perron-FrobeniusTheorem.html

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