Recent Preprints and Publications

Some aspects of efficiency, in Groups-Korea 1998 (ed. Y. G. Baik, D. L. Johnson, A. C. Kim), deGruyter 2000.

A remark on the polyhedrality theorem for the sigma invariants of modules over abelian groups, with R. Bieri, Proc. Cambridge Phil. Soc. 131 (2001), no. 1, 39-43.

The FP-3 conjecture for metabelian groups, with R. Bieri, J. London Math. Soc. (2) 64 (2001), 595-610.

Building resolutions, with D. H. Kochloukova, Journal of Algebra 269 (2003), 632-651.

On the Sigma(3)-conjecture for metabelian groups, with D. H. Kochloukova, J. of the London Math. Soc. (3) 67 (2003), 609-625.

Generalized knot complements and some aspherical ribbon disc complements, with S. Rosebrock, Journal of Knot Theory and its Ramifications, Vol. 12, No. 7 (2003) 947-962.

The Sigma(2)-conjecture for metabelian groups: the general case, with D. H. Kochloukova, J. Algebra 273 (2004), no. 2, 435-454.

Improving tameness for metabelian groups, with W. A. Bogley, New York J. Math. 10 (2004), 1-8.

On the homotopy type of CW complexes with aspherical fundamental group, with J. Jensen, Topology and its Applications, Vol. 153, Issue 15 (2006), 3000-3006.

Exotic presentations and homotopy types for certain 1-relator groups, with J. Jensen, Algebraic & Geometric Topology 6 (2006), 2163–2173.

On distinguishing virtual knot groups from knot groups, with S. Rosebrock, Journal of Knot Theory and Its Ramifications, Vol. 19, No. 5 (2010), 695-704.

On the K-theory and homotopy theory of the Klein bottle group, with A. Misseldine, Homology, Homotopy and Applications, vol. 12(2) (2010), 1-10.

On primeness of labeled oriented trees, with S. Rosebrock, Journal of Knot Theory and its Ramifications, Vol. 21, No. 8 (2012), pp.

Hyperbolic alternating virtual links, Groups Geom. Dyn. 6 (2012), pp.

On the Dehn complex of a virtual link, with R. Byrd, submitted (2012).

Injective labeled oriented trees are aspherical, with S. Rosebrock, submitted (2012).

Complete list of publications

Ongoing Research

Projects and contributions


The International Seminar on Low-Dimensional Homotopy and Combinatorial Group Theory, July 12-21 2009, Joseph, OR