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F. Rudolf Beyl, Mathematics and Statistics emeritus faculty, contributed the photograph of authors Robert Bieri and Ralph Strebel, on the back cover of their book On Groups of PL-homeomorphisms of the Real Line, published by the American Mathematical Soci
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Posted: September 25, 2017

F. Rudolf Beyl, Mathematics and Statistics emeritus faculty, contributed the photograph of authors Robert Bieri and Ralph Strebel, on the back cover of their book On Groups of PL-homeomorphisms of the Real Line, published by the American Mathematical Society in the Mathematical Surveys and Monographs series, Vol. 215, 2016.