### Professional information

**Research Interests**- B.A., Fairmont State College; M.A., Penn State; Ph.D., Wisconsin, 1968. Low-dimensional topology, Geometric and Combinatorial Group Theory. His primary interest is in the study, understanding, and classification of three-manifolds. The mathematical questions and techniques in low-dimensional topology are very similar to those in geometric and combinatorial group theory. Much of this work involves decision problems, algorithms, and computational complexity. Recent work has been the connection of combinatorial structures to the geometry and topology of three-manifolds.
** ****Research Areas**- Low-dimensional Topology/Geometry
** ****Rank**- Full Professor
** ****Office**- MS 502 B/ 402
** ****Phone**- 405-744-6293/744-8225
** ****Additional information**- Head of the Department Regents professor Grayce B Kerr Chair
** **

**Homepage**- http://math.okstate.edu/people/jaco

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