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Fritz Rothberger (1902-2000) was a pioneer in the mathematical field known as "combinatorial set theory". Rothberger became a professor at Acadia University in 1943, where he worked until 1949 when he transferred to University of New Brunswick at Fredericton. Before retiring in 1970, he also worked at Laval and the University of Windsor. After retirement he returned to Acadia University and continued to teach mathematics until 1981. These personal papers of Fritz Rothberger include correspondence, working notes, drafts of papers, and a photograph. Article off prints have not been digitized.
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A remark on the existence of a denumerable base for a family of dyadic functions
Let F be a family of dyadic functions
Letter from Lord Beveridge
Letter from P. Erdos
Letter from P. Erdos
Letter from Rothberger
Letter from W. Sierpinski
Letter to Erdos
Letter to Erdos
Letter to Father Faught
 Letter to Fundamenta Mathematicae
 Letter to Fundamenta Mathematicae
Letter to Lambek
Letter to Sierpinski
Memorandum on Queen's University Letterhead
O. Nikodym's Problem
On Property C and a problem of Hausdoroff
On the negation of the continuum hypothesis
Part of Proof
Photograph of Canadian Mathematical Congress