Judith Q. Longyear

Judith Q. Longyear
Education	Ph.D 1972 Mathematics
Alma mater	Penn State Univ.
Occupation	Professor
Known for	Graph Theory / Combinatorics

Judith Querida Longyear (20 September 1938–13 December 1995^[1]) was an American mathematician and professor.

Contents 1 Professional overview 2 Publications 3 Education overview 4 Personal overview 5 See also 6 Notes 7 References

Professional overview

• Interest areas included: Graph Theory; Combinatorics^[2]
• Member of the American Mathematical Society^[3]
• Longyear taught mathematics at several universities including Dartmouth College^[4] and Wayne State University^[5]

Publications

• "Hadamard tournaments of order 23", Ito Noboru , Leon Jeffrey S. , Longyear Judith Q., Mathematical journal of Okayama University 35, 1–15 ,19931200^[6]
• "There is One Hadamard Matrix of Order 24 and both Characters 1", 05/1979, Annals of the New York Academy of Sciences, vol. 319, issue 1 Second Intern, pp. 354–361^[7]
• A peculiar partition formula. Discrete Mathematics 78(1–2): 115–118 (1989)^[8]
• A New Construction for Hadamard Matrices of Orders 8t+4. J. Comb. Theory, Ser. A 38(1): 99–104 (1985)^[8]
• Order 24 Hadamard Matrices of Character at Least 3. J. Comb. Theory, Ser. A 27(1): 100–118 (1979)^[8]
• Some isomorphisms between pairs of Latin squares. J. Comb. Theory, Ser. B 21(2): 91–95 (1976)^[8]
• Tactical Constructions. J. Comb. Theory, Ser. A 19(2): 200–207 (1975)^[8]
• "Small Configurations and Their Arrays", Source: Duke Math. J. Volume 40, Number 4 (1973), 871–876.^[9][10]

Education overview

• Ph.D. Pennsylvania State University 1972, Dissertation: Tactical Configurations ^[11]

Personal overview

Her son, Bear Longyear ^[12], said the following of his mother: "She didn't shop, clean house, dress up, or even cook much; she spent most of every day curled up in an old armchair with a mug of coffee, a pack of cigarettes, a pile of sharp pencils, and a yellow legal pad, upon which she doodled the hours away in a miniscule [sic] hand, occasionally cursing quietly or whooping loudly. She didn't talk much – not to anyone that I could see – and when I demanded to know what she was doing, her explanations were incomprehensible."^[2]

See also

• Theorem on friends and strangers

Notes

References

• “The Friendship Theorem and Projective Planes” Katie Leonard, Portland State University; December 7, 2005
• "Combinatorics 79", By M. Deza, Ivo G. Rosenberg Publisher Elsevier, 1980 ISBN 0444861106
• On the Enumeration of Some D-Optimal Designs, W.P. Orrick
• "Index to mathematical problems", 1975–1979 By Stanley Rabinowitz, Mark Bowron
• "Graph theory and its applications", A Gewirtz, LV Quintas – 1979 – New York Academy of Sciences.

Persondata
Name	Longyear, Judith Q.
Alternative names
Short description
Date of birth	1938
Place of birth
Date of death	1995
Place of death