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Topology Research Group

Topology research at OSU focuses on knot theory and three-dimensional manifolds, using combinatorial, geometric and algebraic tools. Particular topics include triangulations, embedded surfaces and both classical and quantum invariants.


  • Neil Hoffman
    B.A., Williams College, 2004; PhD, University of Texas, 2011.

    Dr. Hoffman focuses on problems in low-dimensional topology relating to knot theory, triangulations, commensurability, and the algorithmic classification of 3-manifolds
  • William Jaco

    B.A., Fairmont State College; M.A., Penn State; Ph.D., Wisconsin, 1968. Low-dimensional topology, Geometric and Combinatorial Group Theory.

    Dr. Jaco's 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.

  • Weiping Li

    B.S., Dalian Institute of Technology; Ph.D., Michigan State, 1992.

    Dr. Li is interested in Floer homologies of instantons on 3-manifolds and Lagrangian intersections; semi-infinite homology of infinite Lie algebras; mapping class groups and knot theory.

  • Robert Myers

    B.A./M.A./Ph.D., Rice U., 1977.

    Dr. Meyers's research area, geometric topology, is the study of spaces called manifolds. These are generalizations of the curves and surfaces encountered in calculus. The subject has close ties to group theory and geometry. One particularly rich source of examples and applications, which is also very accessible and easy to visualize, is knot theory. This is exactly what its name implies: the mathematical study of knotted curves in ordinary space.

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