Judith Querida Longyear (20 September 1938 – 13 December 1995) was an American mathematician and professor whose research interests included graph theory and combinatorics. Longyear was the second woman to ever earn a mathematics Ph.D. from Pennsylvania State University, where she studied under the supervision of Sarvadaman Chowla and wrote the thesis Tactical Configurations.PSU Mathematics Alumni, retrieved 2014-06-25. Longyear taught mathematics at several universities including California Institute of Technology, Dartmouth College and Wayne State University. She worked on nested block designs and Hadamard matrices.
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