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# Publications

45. Relatively hyperbolic groups with free abelian second cohomology (pdf), (with E. Swenson) arXiv 1812.08893.

44. Non-cocompact group actions and $\pi_1$ semistability at infinity (pdf), (with R. Geoghegan and C. Guilbault) arXiv1709.09129.

43. Topological properties of spaces admitting a coaxial homeomorphism (pdf), arXiv 1709.09140.

42. Bounded depth ascending HNN extensions and $\pi_1$-semistability at infinity (pdf), (with R. Geoghegan and C. Guilbault) arXiv 1611.01807.
41. Relatively hyperbolic groups with semistable fundamental group at infinity (pdf), (with E. Swenson) arXiv:1709.02420.
40. Semistability and Simple Connectivity at Infinity of Finitely Generated Groups with a Finite Series of Commensurated Subgroups (pdf), Algebraic and Geometric Topology 16-6 (2016), 3615-3640.
39. JSJ decompositions of Coxeter groups over virtually abelian splittings (pdf), arXiv:0804.3963.
38. Commensurated Subgroups, Semistability and Simple Connectivity at Infinity (pdf), (with G. Conner) Algebraic and Geometric Topology, 14-6 (2014), 3509–3532.
37. A classification of right angled Coxeter groups with no 3-flats and locally connected boundary (pdf), (with W. Camp) J. Group Theory, 17 (2014), no. 5, 717-755.
36. Geodesically tracking quasi-geodesic paths for Coxeter groups (pdf), (with S. Tschantz) Bulletin of the London Mathematical Society, 45 (2013), no 4, 700-714.
35. Commensurated Subgroups and Ends of Groups (pdf), (with G. Conner) J. Group Theory, 16 (2013), No. 1, 107-139.
34. Strong accessibility of Coxeter groups over minimal splittings (pdf), (with S. Tschantz), J. Pure Appl. Algegra, 216 (2012), No. 5, 1102-1117.
33. Visual decompositions of Coxeter groups (pdf), (with S. Tschantz), Groups, Geom., and Dyn. 3 (2009) 173-198.
32. On the rank of a Coxeter group (pdf), (with J. Ratcliffe), J. Group Theory 12, No. 3 (2009) 449-464.
31. Quotient isomorphism invariants of a finitely generated Coxeter group (pdf), (with J. Ratcliffe and S. Tschantz), In – Aspects of Infinite Groups, Ed. B. Fine, G. Rosenberger, and D. Spellman, Algebra Discrete Math. 1 (2008), 16pp. World Sci. Publ., Hackensack NJ.
30. Matching theorems for systems of a finitely generated Coxeter group (pdf), (with J. Ratcliffe and S. Tschantz), Algebr. Geom. Topol. 7 (2007) 919-956.
29. Local connectivity of right angled Coxeter group boundaries – improved (pdf), ( joint with K. Ruane and S. Tschantz), J. Group Theory 10, No. 4 (2007) 531-560.
28. The even isomorphism theorem for Coxeter groups (pdf), Trans. Amer. Math. Soc. 359, No. 9 (2007) 4297-4324.
27. Homotopy of ends and boundaries of CAT(0) groups (pdf), (with G. Conner and S. Tschantz), Geom. Dedicata 120 (2006) 1-17.
26. Reflection independence in even Coxeter groups (pdf), (with P. Bahls) Geom. Dedicata 110 (2005) 63-80.
25. Ascending HNN-extensions of finitely generated free groups are Hopfian, (with R. Geoghegan, M. Sapir and D. Wise), Proc. London Math. Soc. 33 (2001) 292-298.
24. CAT(0) HNN-extensions with non-locally connected boundary, (with K. Ruane) Topology Appl. 100 (2001) 83-98.
23. Cat (0) groups with non-locally connected boundary, (with K. Ruane) J. London Math. Soc. (2) 60 (1999) 757-770.
22. Group extensions, HNN-extensions and tame pairs, Trans. Amer. Math. Soc. 381, No. 2 (1999) 1095-1107.
21. Tame combings for groups, (with S. Tschantz), Trans. Amer. Math. Soc. 349 No. 10 (1997) 4251-4264.
20. Compactifying coverings of 3-manifolds, Comment. Math. Helv. 71 (1996), 362-372.
19. Semistability at infinity, simple connectivity at infinity and normal subgroups, Topology Appl. (3) 72 (1996), 273-281.
18. The fundamental groups at infinity, (with R. Geoghegan), Topology(3) 35 (1996), 665-669.
17. Semistability of Artin and Coxeter groups, J. Pure Appl. Algebra 111 (1996), 205-211.
16. The QSF property for groups and spaces, (with S. Brick), Math. Zeit. (2) 220 (1995), 207-218.
15. Group extensions are QSF, (with S. Brick), Bull. Austral. Math. Soc. (1) 50 (1994), 21-28.
14. Quasiconvex subgroups of hyperbolic groups, (with S. Tschantz), Bull. Amer. Math. Soc. (1) 26 (1992), 131-136.
13. Semistability of amalgamated products, HNN-extensions and all one relator groups, (with S. Tschantz), Bull. Amer. Math. Soc.(1) 26 (1992), 131-136.
12. One relator groups are semistable at infinity, (with S. Tschantz), Topology (4) 31 (1992), 801-804.
11. Ends of amalgamated products and HNN-extensions, (with S. Tschantz), Mem. Amer. Math. Soc.
(# 471) 98 (1992).
10. Notes on negatively curved groups, (with J.M. Alonso, T. Brady, D. Cooper, V. Ferlini, M. Lustig, M. Shapiro, H. Short (editor)), In proceedings of the workshop of Group Theory from a Geometrical Viewpoint– ICIP, Trieste, Italy (1991), World Scientific, edited by A. Haefliger, E. Ghys and A. Ver- jovsky, 3-63.
9. Semistability at infinity, infinite ended groups and group cohomology, Trans. Amer. Math. Soc.(2) 303 (1987), 479-485.
8. Solvable groups that are simply connected at infinity, Math. Zeit. 195 (1987) 79-87.
7. A note on the vanishing of $H^n(G:ZG)$, J. Pure Appl. Algebra 39 (1986), 301-304.
6. Semistability of finitely generated groups and solvable groups, J. Pure Appl. Algebra 35 (1985), 305-320.
5. Ends of double extension groups, Topology 25 (1986), 45-53.
4. Ends of groups with integers as a quotient, J. Pure Appl. Algebra 35 (1985), 305-320.
3. Free abelian cohomology of groups and ends of universal covers, (with R. Geoghegan), J. Pure Appl.  36 (1985), 123-137.
2. Semistablility at the end of a group extension, Trans. Amer. Math. Soc. 277 (1983), 307-321.
1. Ends of fundamental groups in shape and proper homotopy, Pac. J. Math.(2) 90 (1980),
431-458.