• Low-dimensional Topology 
  • Knots, Links, and 3-manifolds 
  • History of Mathematics
  • Mathematics and Music
  • Teacher Training in Mathematics

Jeff Johannes

Associate Professor of


South 326A
1 College Circle
Geneseo, NY 14454

Jeff Johannes has been a member of the Geneseo faculty since 2001.


I will not update this page.  My actual website is here:  



Please visit me there.  

Faculty Information


  • Ph. D, Indiana University, 1998
  • B. A., Cornell University, 1992

Research Interests

I am currently pursuing several research projects. The newest of the projects is an exploration of the role of Euclid's Fourth Postulate: "All right angles are equal." The older of these projects consists of investigating how the Casson-Walker-Lescop 3-manifold invariant changes when modifying the presenting link for a 3-manifold. This project has evolved into studying questions of the Ohtsuki invariants of rational homology spheres, and questions of the space of finite type invariants for links of three or more components.

Publications and Professional Activities

  • A Type 2 Polynomial Invariant of Links Derived from the Casson-Walker Invariant, Journal of Knot Theory and Its Ramifications, Vol. 8, No. 4 (1999) 491-504.
  • The Casson-Walker-Lescop invariant and link invariants, Journal of Knot Theory and Its Ramifications, Vol. 14, No. 4 (2005) 425-433.
  • Bandpass moves and the Casson-Walker-Lescop invariant, New York Journal of Mathematics, Vol. 10 (2004), 231-247.
  • Modern Geometry and the End of Mathematics, in MAA notes #68 From Calculus to Computers: Using the Last 200 Years of Mathematics History in the Classroom, 2005.


  • I am an active member of the Mathematical Association of America.
  • I am the liaison coordinator and the chair of the Seaway NExT Steering Committee.
  • I am also a member of the American Mathematical Society.
Fall 2014 Classes

MATH 222:
Calculus II

    Derivatives and antiderivatives of the transcendental functions, methods of integration, applications of definite integrals, sequences, improper integrals, and series. Prerequisites: MATH 221. Offered
    every semester
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MATH 239:
Intro to Mathematical Proof

    The course will provide an introduction to the language of advanced mathematics and to mathematical proof. It will emphasize rigorous argument and the practice of proof in various mathematical contex
    ts. Topics will include logic, set theory, cardinality, methods of proof, and induction. Other mathematical topics chosen at the discretion of the instructor will be included as material through which proving skills will be honed. Prerequisites: MATH 222 or permission of the department. Offered every semester
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MATH 338:

    detailed examination of topological spaces and mappings. The properties of compactness, connectedness, and separation are studied. Further topics from general, geometric, or algebraic topology will
    also be discussed. Prerequisites: MATH 223 and MATH 239. Offered fall, even years
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