Collection consists of typescript and holograph manuscripts of mathematical calculations, proofs, notes, diagrams and diary entries; and coloured slides of tiling diagrams of geometric shapes in various combinations and sequences. Mathematical subjects include hexagonal tiling and prime numbers. Titles on binders containing manuscripts include Tile, Twinlock, N-rep presentations, Hex, Penrose pair, N roots, Re-ordering of O-branch sets and Pythagorean (Hex) numbers play.

Fonds consists of correspondence; research material on a broad range of mathematical topics; manuscripts of mathematical articles, notes, calculations and solutions to mathematical problems; and published work.

Fonds consists of Leon Bankoff's collection of material relating to a geometric figure, the 'arbelos'. Includes correspondence, primarily with other mathematicians including Clayton W. Dodge, Howard Eves, Leo Sauvé, and Charles W. Trigg; manuscripts including notebooks; published works; works by others; and material by and about M. Victor Thébault.

Fonds consists of correspondence between Ms. C.M. Jones and Richard Guy and solutions to problems in number theory.

Fonds consists of miscellaneous archival material including: newspaper clippings of puzzles and other items relating to recreational mathematics, mainly in Dutch (Acc 2080); Martin Gardner's Mathematical games column from Scientific American, December 1956-September 1974 (Acc 2120); various supplementary catalogues and mailings from Mathematisch Centrum, 1949-1964 (Acc 2123); a partial descriptive catalogue of the Eugene Strens Recreational Mathematics book collection on 4x6 cards and miscellaneous items removed from the books and journals in the collection (Acc 2188-2189); and an album of photographs and text from the Eugène Strens Memorial Conference on Intuitive and Recreational Mathematics and Its History, July 27 - August 2, 1986, University of Calgary, Calgary, Alberta (Acc 2774).

Fonds consists of correspondence between H.L. Nelson and various persons relating to puzzles and games and to Journal of Recreational Mathematics during period when H.L. Nelson was editor of the journal.

Fonds consists of manuscripts and published works by J.R. Hendricks, a CD containing many of his publications, works about him and works by others.

Fonds consists of correspondence and related material such as notes, solutions, papers and reprints of various correspondents including Norman Anning, Donald Coxeter, Clayton W. Dodge, Paul Erdos, Martin Gardner, Victor Thébault, Charles W. Trigg and Leo Sauvé; research material on a broad range of mathematical topics; notebooks; manuscripts of mathematical articles and solutions and book reviews; published works; works about L. Bankoff; photographs; slides; and miscellaneous. Fonds also includes selected issues of many mathematics journals including American Mathematics Monthly and Mathematics Magazine.

Fonds consists of correspondence with various persons including H.S.M. Coxeter and Harry O. Davis, notebooks, manuscripts on mathematical topics and works by other authors with annotations by V. Meally.

Fonds consists of puzzles, computer programs, articles, works by other authors, correspondence between W.E. Philpott and various persons including Martin Gardner, Harry L. Nelson, Joseph S. Madachy.