CURRICULUM VITAE - Karen Vogtmann

Goldwin Smith Professor of Mathematics
Cornell University

Address  
 

Department of Mathematics
503 Malott Hall
Cornell University
Ithaca, NY 14853-4201

(607) 255-6494
vogtmann@math.cornell.edu

Education  
 
  • B.A. University of California, Berkeley 1971
  • Ph.D. University of California, Berkeley 1977
Principal fields of interest  
 
  • Geometric group theory
  • Low-dimensional topology
  • Cohomology of groups
Employment history  

 

 

 

 
  • Cornell University
        Goldwin Smith Professor of Mathematics, 7/11 to present
        Professor, 1/94 to 7/11
        Associate Professor, 7/87 to 12/93
        Assistant Professor, 7/85 to 6/87
        Visiting Assistant Professor, 9/84 to 6/85
  • Columbia University, Assistant Professor, 7/79 to 6/86
  • Brandeis University, Visiting Assistant Professor, 9/78 to 12/78
  • University of Michigan, Visiting Assistant Professor, 9/77 to 6/78 and 1/79 to 6/79
Sabbatical and Research positions  

 

 

 

 

 
  • Freie Universität Berlin, Berlin, Germany, 6/12
  • Mittag-Leffler Institute, Stockholm, Sweden, 3/12 to 5/12
  • Visiting Researcher, Oxford University, Oxford, England, 2/12
  • Professeur invit´e, Marseilles, France, 5/11
  • Hausdorff Institute for Mathematics, 9/09 to 12/09 and 5/10-8/10
  • Mathematical Sciences Research Institute, Berkeley, 8/07 to 12/07
  • I.H.E.S., Bures-sur-Yvette, France 3/04
  • Professeur Invit´e, Marseilles, France, 3/00
  • Mathematical Sciences Research Institute, Berkeley, 1/95 to 7/95
  • I.H.E.S., Bures-sur-Yvette, France, 1/92-8/93
  • Chercheur, C.N.R.S., E.N.S. de Lyon, France, 9/92-12/92
  • Mathematical Sciences Research Institute, Berkeley,1/89 to 6/89
  • University of Illinois at Chicago, 1/88 to 6/88
  • Institute for Advanced Study, Princeton.9/80 to 8/81
Research grants  

 

 

 

 
  • National Science Foundation grants for research in mathematics 1978-79, 1983-present
  • National Science Foundation Visiting Professorship for Women grant, 1984-85
  • National Science Foundation Career Advancement Award, 1989
Ph.D. Students  

 

 
  • Thomas Brady (1988)
  • Martin Bridson (1991)
  • Debra Boutin (1998)
  • Craig Jensen (1998)
  • Lisa Orlandi-Korner (1998)
  • G. Christopher Hruska (2002)
  • F. Gerlits (2002)
  • Matt Horak (2003)
  • Brad Forrest (2009)
  • Owen Baker (2011)
  • Victor Kotsyuk (2011)
  • Juan Alonso (2012)
  • Vikas Taliwal (current)
Professional service  

 

 

 

 

 

 

 

 
    Scientific Advisory Boards
  • Scientific Advisory Committee, International Summer School of Mathematics for Young Students (2012- )
  • Steering Committee, Park City Mathematics Institute (2010- )
  • Board on Mathematical Sciences and Their Applications of the National Academies (2010- )
  • U.S. National Committee for Mathematics (2009-2012)
  • Research Advisory Panel, Mathematics, Simons Foundation (2011)
  • Scientific Advisory Committee of the Mathematical Sciences Research Institute (2006-2010)
  • ArXiv Advisory Board (2004- )
  • Scientific Research Board of the American Institute of Mathematics (1998-2005)

    • Editorial Boards
  • Consulting Editor, Journal of the Edinburgh Math Society (2012- )
  • Associate Editor, Journal of the AMS (2010- )
  • Editorial Board, Algebraic and Geometric Topology, (2006 - )
  • Associate Editor, Research/Expository surveys, Bulletin of the A.M.S. (1998-2000)

    • American Mathematical Society
  • Board of Trustees, American Mathematical Society (2008-2013 (chairman 2011))
  • Vice President, American Mathematical Society, (2003-2006)
  • AMS Committee on Education (2003-2006)
  • AMS delegate to ICIAM board (May 2005)
  • Executive Committee, American Mathematical Society (1999-2003)
  • AMS Committee on Meetings and Conferences (1997-2003), chairman (2000-2003)
  • Member-at-Large, Council of the AMS (1997-2000)
  • AMS Fellowship Committee 1989-90 (chairman 1990)

    • External Review Panels
  • External review panel, University of Southern California (2010)
  • External review panel, CUNY (2008)
  • External review panel, University of Utah, (chair, 2007)
  • External review panel, University of Texas at Austin, 2004
  • External review panel, Rutgers University Newark, 1997

    • Other Service
  • U.S. Delegation to the International Mathematical Union General Assembly (2006, 2010 (chair in 2010))
  • National Research Council Panel to evaluate the VIGRE program (2007-2008)
  • Vietnam Education Foundation mathematics panel (June 2005)
  • Selection committee, NSF graduate fellowships in Mathematics, 1994, 1996-99 (chairman1999)
  • Selection committee, Gehman lectures, Seaway section of the MAA, 1997
  • AWM Noether Lecturer selection committee 1991-1993 (chairman 1993)
  • Reviewer, Math Reviews 1977-1990
  • Served on numerous panels at the National Science Foundation
  • Referee for numerous professional journals
Conferences organized  

 

 

 

 

 

 
  • (with Cornell topologists) Topology Festival, Cornell University, 1986-present
  • (with M. Culler, D. Calegari, D. Gabai, J. Hass, R. Lipshitz, G. Walsh) Topology, geometry and group theory, informed by experiment, ICERM, Providence, RI, October 2013
  • (with M. Bridson, L. Kramer and B. Remy) Geometric group theory, Oberwolfach, June 2013
  • (with B. Farb, G. Niblo and D. Witte-Morris) Cohomological methods in geometric group theory, BIRS, Banff, November 2012
  • (with M. Bestvina and M. Sageev) Park City/IAS summer math institute in Geometric Group Theory, July 2012
  • (with M. Bridson, M. Bucher-Karlsson, A. Karlsson, T. Smirnova-Nagnibeda) Geometric and Analytic Methods in Group Theory, Mittag-Leffler Institute, Spring 2012
  • (with S. Hermiller, J. Meier and D. Webb), Approaches to Group Theory, a conference in honor of Ken Brown, October 2010.
  • (with M. Bridson, L. Kramer and B. Remy) Non-positive curvature and geometric structures in group theory, Oberwolfach, April 2010
  • (with M. Bestvina, J. McCammond and M. Sageev) Semester program in Geometric Group Theory, M.S.R.I., Berkeley, CA, Fall 2007
  • (with M. Bestvina, J. McCammond and M. Sageev) Introductory workshop in Geometric Group Theory, M.S.R.I., Berkeley, CA, August 27-31 2007
  • (with R. Charney and I. Chatterji) Connections for Women: Classics of Geometric Group Theory, M.S.R.I., Berkeley, CA August 23-24, 2007
  • (with R. Charney) Special session on Geometric Group Theory, Annual meeting of the AMS, New Orleans, LA, January 2007
  • (with M. Bridson and P. Kropholler) Topological and geometric methods in group theory, Oberwolfach, Germany, April 2006
  • (with A. Chang, R. Charney, A. Grassi, C-L Terng, and K. Uhlenbeck) The Geometry of Groups, Program for Women in Mathematics, Institute for Advanced Study and Princeton University, Princeton, NJ, May 2005
  • (with S. Holmes and L. Billera) AIM workshop on Geometric models of biological phenomena, Palo Alto, CA, June 2003
  • (with G. Levitt) Special session at joint meeting of AMS and French Mathematical Society, Lyon, France, July 2001
  • (with H. Abels and P. Kropholler) Conference on Topological and Geometric Methods in Group Theory, Oberwolfach, Germany, January 2001
  • (with R. Alperin) A.M.S. Special Session on Geometric Methods in Combinatorial Group Theory, November 1989.
  • (with A. Borel and J. Harer) M.S.R.I. Workshop on Buildings and Arithmetic Groups, Berkeley, CA, May 1989
Publications  
  1. Homology Stability for On,n, Comm. Alg., 7 (1979), no.1., 9-38.
  2. Spherical Posets and homology stability for On,n, Topology 20 (1981), 119-132.
  3. A Stieffel complex for the orthogonal group of a field, Comment. Math. Helv. 57 (1982), no.1, 11-21.
  4. The integral homology of SL2 and PSL2 over Euclidean imaginary quadratic integers, (with J. Schwermer) Comment. Math. Helv. 58 (1983) no.4, 573-598.
  5. Rational homology of Bianchi groups, Math. Ann. 272 (1985), 399-419.
  6. Moduli of graphs and automorphisms of free groups, (with M. Culler) Inventionnes 84 (1986), 91-119.
  7. A generating function for the Euler characteristic of Out(Fn), (with J. Smillie) J. Pure and Appl. Algebra 44 (1987), 329-348.
  8. Automorphisms of graphs, p-subgroups of Out(Fn) and the Euler characteristic of Out(Fn), (with J. Smillie) J. Pure and Appl. Algebra 49 (1987), 187-200.
  9. Local structure of some Out(Fn)-complexes, Proc. Edinburgh Math Soc. 33 (1990), 367-379.
  10. The boundary of outer space in rank two, (with M. Culler) in Arboreal Group Theory (R. Alperin, ed) New York: Springer-Verlag (1991) 189-229.
  11. Automorphisms of SL2 of imaginary quadratic integers, (with J. Smillie) Proc. A.M.S.112 (1991) no. 3
  12. Equivariant Outer space and automorphisms of free-by-finite groups (with S. Krstic),Comment. Math. Helvetici 68 (1993) 216-262.
  13. Length functions and outer space (with J. Smillie), Michigan Math J. 39 (1992) 485-493.
  14. End invariants of the group of outer automorphisms of a free group, Topology 14 (1995) no. 3, 533-545.
  15. Isoperimetric inequalities for automorphism groups of free groups (with A. Hatcher), Pacific J. Math. 173 (1996), no. 2, 425-441.
  16. On the geometry of the group of automorphisms of a free group (with M. Bridson), Bull. London Math. Soc. 27 (1995), 544-552.
  17. A group-theoretic criterion for property FA (with M. Culler), Proc. Amer. Math. Soc. 124 (1996), no. 3, 677-683
  18. Cerf theory for graphs (with A. Hatcher), J. London Math. Soc., 58, part 3 (1998), 633-655.
  19. The complex of free factors of a free group (with A. Hatcher), Quart. J. Math. Oxford Ser. (2) 49 (1998), no. 196, 459–468.
  20. Rational homology of Aut(Fn) (with A. Hatcher), Mathematical Research Letters 5 (1998), 759-780.
  21. An Equivariant Whitehead algorithm and conjugacy for roots of Dehn twists (with S. Krstic and M. Lustig), Proceedings of the Edinburgh Math Society 44 (2001), 117-141.
  22. A Whitehead algorithm for surface groups (with G. Levitt), Topology 39 (2000), no. 6, 1239–1251.
  23. The symmetries of Outer space (with M. R. Bridson), Duke Math Journal 106 (2001), 391–409.
  24. Automorphisms of automorphism groups of free groups (with M. R. Bridson), J. Algebra 229 (2000), no. 2, 785–792.
  25. Geometry of the space of phylogenetic trees (with L. Billera and S. Holmes), Advances in Applied Math 27 (2001), 733-767.
  26. Automorphisms of free groups and outer space, Proceedings of the Conference on Geometric and Combinatorial Group Theory, Part I (Haifa, 2000). Geom. Dedicata 94 (2002), 1–31.
  27. Homomorphisms from automorphism groups of free groups, (with Martin R. Bridson), Bull. London Math. Soc. 35 (2003), no. 6, 785–792.
  28. Infinitesimal operations on graph complexes, (with James Conant), Math. Ann. 327 (2003), 545–573.
  29. On a theorem of Kontsevich, (with Jim Conant), Algebr. Geom. Topol. 3 (2003) 1167-1224.
  30. Cut vertices in commutative graphs, (with James Conant and Ferenc Gerlits), Quart. J. Math 56(3) (2005), 321-336.
  31. Morita classes in the homology of automorphism groups of free groups, (with Jim Conant), Geom. Topol. 8 (2004), 1471-1499.
  32. Homology stability for outer automorphism groups of free groups, (with Allen Hatcher), Algebr. Geom. Topol. 4 (2004), 1253-1272.
  33. Erratum to: homology stability for outer automorphism groups of free groups, (with Allen Hatcher and Nathalie Wahl), Algebr. Geom. Topol. 20 (2006), 573-579.
  34. Automorphism groups of free groups, surface groups and free abelian groups, (with Martin Bridson), in Problems on Mapping Class Groups, edited by B.Farb, Proc. Symposia in Pure Mathemaics, AMS, Providence, RI, 2006, 301-316.
  35. The cohomology of automorphism groups of free groups, Proceedings of the International Congress of Mathematicians, Madrid 2006, EMS, Zurich, Switzerland, 1101-1119.
  36. Morita classes in the homology of Aut(F_n) vanish after one stabilization, (with James Conant), Groups, Geometry and Dynamics 2 (1) (2008) 121-138
  37. Automorphisms of two -dimensional right-angled Artin groups, (with John Crisp and Ruth Charney), Geometry & Topology 11 (2007) 2227-2264.
  38. Automorphism groups of right-angled Artin Groups, Guido's book of conjectures, L'Enseignement Mathematiques Monographie No. 40, 2008.
  39. A presentation for Aut(F_n), (with Heather Armstrong and Bradley Forrest), to J. of Group Theory 11 (2008), 267-276.
  40. Finiteness properties of automorphism groups of right-angled Artin groups (with Ruth Charney), Bull. London Math. Soc. (41) February (2009) 94 - 102.
  41. What is Outer space?, Notices of the AMS 55, No. 7 (2008) 784-786.
  42. Automorphisms of two-dimensional RAAGs and partially symmetric automorphisms of free groups (with K.-U. Bux and R. Charney), Groups, Geometry and Dynamics 3 (4) (2009) 541–554
  43. Actions of automorphism groups of free groups on spheres and acyclic manifolds (with Martin Bridson), Commentarii Math. Helv. 86 (1) (2011)
  44. Subgroups and quotients of automorphism groups of RAAGs (with R. Charney), in
    Low-dimensional and Symplectic Topology - Proceedings of Symposia in Pure and Applied Math., Michael Usher ed University of Georgia, Editor - AMS, 2011.
  45. Abelian covers of graphs and maps between outer automorphisms of free groups (with M. R. Bridson), Math. Ann. 353 (2012), no. 4, 1069–1102.
  46. The Dehn functions of Aut(F_n) and Out(F_n) (with M. R. Bridson), Annales de l'institut Fourier, 62 no. 5 (2012), p. 1811-1817
  47. Hairy graphs and the unstable homology of M(g,s), Out(F_n) and Aut(F_n), (with J. Conant and M. Kassabov), J Topology (2013) 6(1): 119-153.
  48. Actions of arithmetic groups on homology spheres and acyclic homology manifolds, (with M.R. Bridson, F. Grunewald and B. Zimmermann), submitted.
  49. Outer space for right-angled Artin groups I, (with R. Charney and Nathaniel Stambaugh), arXiv:1212.4791
Ten invited addresses  
 
  1. International Congress of Mathematicians, Madrid, Spain, August 2006
  2. Groups of Diffeomorphisms 2006, Conference in honor of S. Morita's 60th birthday, Tokyo, Japan, September 2006
  3. AWM Noether Lecture, New Orleans, LA, January 2007
  4. Geometry and the Imagination, conference in honor of William P. Thurston's 60th birthday, Princeton, NJ, June 2007
  5. Plenary address, AMS Spring Sectional Meeting, San Francisco, CA, April 2009
  6. Georgia International Topology Conference, Athens, GA, May 20099
  7. Felix Klein Lectures, Hausdorff Institute for Mathematics, Bonn, Germany, May-June 2010
  8. Plenary Address, British Mathematical Colloquium, Leicester, England, April 2011
  9. 2011 European Math Society Lectures (Barcelona, Oxford, Stockholm)
  10. Panorama of Topology, Conference in honor of William Browder, Princeton, New Jersey, May 2012
All invited lectures since 2001  
 
    2001
  1. Special Session on Geometric Group Theory, Annual AMS meeting, New Orleans, LA, January 2001
  2. Topology Seminar, Columbia University, February 2001
  3. Conference on non-positive curvature and analysis, Penn State University, State College, PA, March 2001
  4. Georgia Topology Conference, May 2001
  5. Graphs and Patterns in Mathematics and Theoretical Physics, A conference to celebrate Dennis Sullivan’s 60th birthday, Stony Brook, NY June 2001
  6. Workshop on Moduli Spaces, Stanford, CA, August 2001
  7. Colloquium, Northwestern University, November 2001
  8. Colloquium, University of Chicago, November 2001
  9. Topology Seminar, Duke University, December 2001

    10. 2002
  10. Algebraic Geometry Seminar, Duke University, Durham, NC, December 2002
  11. Group Theory Seminar, Graduate Center of CUNY, New York, NY February 2002
  12. Topology Seminar, Binghamton University, April 2002
  13. Colloquium, Neuchatel, Switzerland, June 2002
  14. Minicourse on outer space, Neuchatel, Switzerland, June 2002
  15. Topology seminar, Geneva, Switzerland, June 2002
  16. AMS Special session in Geometric Group Theory, Boston, October 2002
  17. Topology seminar, Stonybrook, NY, November 2002
  18. Colloquium, Stonybrook, NY, November 2002

    19. 2003
  19. Colloquium, University of Pennsylvania, Philadelphia, PA, February 2003
  20. Topology Seminar, Yale University, February 2003
  21. AMS special session on Rigidity in topology and dynamics, NewYork, NY April 2003.
  22. Topology Festival, Cornell, May 2003
  23. Durham Symposium, July 2003
  24. Stony Brook String Theory conference, August 2003
  25. Oberwolfach Topologie, September 2003
  26. Institut Henri Poincare, September 2003
  27. AMS special session, Binghamton, October 2003
  28. Albany Group Theory, October 2003
  29. Seminar, R.I.M.S., Kyoto, Japan, December 2003

    30. 2004
  30. Topology Seminar, Max Planck Institute, Bonn, Germany, March 2004
  31. AMS special session on Group Cohomology and related topics (in honor of William Browder’s 70th birthday), Lawrenceville, NJ, April 2004
  32. Colloquium, University of Illinois at Champaign-Urbana, April 2004
  33. Workshop on Classifying Spaces for Families, Munster, Germany, June 2004
  34. AMS special session on Topological and geometric methods in group theory, Nashville, TN, October 2004
  35. CMS special session on Combinatorial and Geometric Group Theory, Montreal, Quebec, December 2004

    36. 2005
  36. Colloquium, University of Tennessee, January 2005
  37. Topology Seminar, Columbia University, February 2005
  38. Algebra Seminar, University of Glasgow, March 2005
  39. Colloquium, Brandeis University, March 2005
  40. Midwest Topology Seminar, University of Chicago, April 2005
  41. Course in geometric group theory (4 lectures), Program for Women in Mathematics, IAS, Princeton, NJ, May 2005
  42. Colloquium, University of Education, Hanoi, Vietnam, June 2005
  43. Colloquium, VAST Institute of Mathematics, Hanoi, Vietnam, June 2005
  44. Barcelona Conference on Geometric Group Theory, Barcelona, Spain, June 2005
  45. Topology meeting, BIRS, Banff, Canada, August 2005
  46. Geometric and Probabilistic Methods in Group Theory and Dynamical Systems, Texas A&M, College Station, TX, October 2005
  47. Flavors of Groups meeting, BIRS, Banff, Canada, November 2005
  48. Wasatch Topology Conference, Park City, Utah, December 2005

    49. 2006
  49. Colloquium, Penn State University, March 2006
  50. University of Arkansas Spring Lecture Series, Fayetteville, AR, April 2006
  51. Combinatorial and geometric group theory, in honor of A. Yu. Olshanskii, Nashville, TN. May 2006
  52. Conference sur la theorie geometrique des groupes, Montreal, Canada, July 2006
  53. International Congress of Mathematicians, Madrid, Spain, August 2006
  54. Groups in Geometry and Topology, Malaga, Spain, September 2006
  55. Groups of Diffeomorphisms 2006, Tokyo, Japan, September 2006
  56. Oberwolfach Topologie, Oberwolfach, Germany, September 2006
  57. ETH Zurich, November 2006

    58. 2007
  58. AWM Noether Lecture, New Orleans, LA, January 2007
  59. Conference on the Topology and Geometry of Moduli Spaces, Stanford, CA, January 2007
  60. Mini-course, Conference on Outer space, Luminy, France, February 2007
  61. Topology, Banff, Canada, February 2007
  62. Colloquium, University of Michigan, March 2007
  63. Topology/Geometry seminar, University of Chicago, May 2007
  64. Geometry and the Imagination, conference in honor of William P. Thurston's 60th birthday, Princeton, NJ, June 2007
  65. MSRI/Evans lecture, Berkeley, CA, September 2007
  66. Topology seminar, University of California, Berkeley, October 2007
  67. Topics in Geometric Group Theory, MSRI, Berkeley, CA November 2007
  68. UCSB Distinguished Lecturer (2 lectures), University of California at Santa Barbara, November 2007
  69. Winterschule (5 lectures), Goettingen, Germany, December 2007

    70. 2008
  70. Colloquium, McMaster University, Hamilton, Ontario, Canada, January 2008
  71. Colloquium, Stanford University, Stanford, CA, February 2008
  72. Colloquium, University of Texas, Austin, TX, March 2008
  73. Alaoglu Lecture, California Institute of Technology, Pasadena, CA, May 2008
  74. Workshop on Discrete Groups and Geometric Structures, Kortrijk, Belgium, May 2008
  75. Oberwolfach Topologie, Oberwolfach, Germany, September 2008
  76. WISEST lecture, University of Illinois at Chicago, October 2008
  77. Topology seminar, University of Illinois at Chicago, October 2008

    78. 2009
  78. Topology Seminar, Oxford University, Oxford, England, January 2009
  79. Talk to Lehman College scholarship students, Lehman College, New York NY February 2009
  80. Group Theory Seminar, CUNY graduate center, New York NY, February 2009
  81. Colloquium, Yale University, February 2009
  82. Spring Topology and Dynamics conference, Gainesville, FL, March 2009
  83. Geometry/Topology seminar, University of Illinois at Chicago, March 2009
  84. Colloquium, Brown University, April 2009
  85. Plenary address, AMS Spring Sectional Meeting, San Francisco, CA, April 2009
  86. Georgia Topoogy Conference, Athens, GA, May 2009
  87. Geometry and Topology, Münster Universität, Münster, Germany June 2009
  88. Davis 60: Geometric Group Theory, Bedlewo, Poland, June 2009
  89. Coloquio Brasileiro de Mathematica, Algebra session, IMPA, Rio de Janeiro, Brazil, August 2009
  90. William Rowan Hamlton workshop, Dublin, Ireland, September 2009
  91. Topology/Geometry seminar, University of Glasgow, Glasgow, Scotland, October 2009
  92. Colloquium, University of Münster, Münster, Germany, October 2009
  93. Topology Seminar, Oxford University, Oxford, England, November 2009
  94. 12th Nordrhein-Westfalen Topology Meeting, Düsseldorf, Germany, November 2009
  95. Workshop on Rigidity, Hausdorff Institute for Mathematics, Bonn, Germany, November 2009
  96. Kolloquium, Karlsrühe University, Karlsrühe, Germany, December 2009
  97. Workshop on Geometric structures and geometric group theory, KIAS, Seoul, Korea, December 2009
  98. Special session, Joint KMS-AMS meeting, Seoul, Korea, December 2009

    99. 2010
  99. Stanford Undergraduate Math Organization, Stanford, CA, January 2010
  100. Nebraska Conference for Undergraduate Women, Lincoln, NE, January 2010
  101. Felix Klein Lectures, Hausdorff Institute for Mathematics, Bonn, Germany, May-June 2010
  102. Colloquium, Mathematics Institute, University of Warwick, Coventry, England, June 2010
  103. Workshop on Geometric Group Theory, Goa, India, August 2010
  104. Colloquium, Northwestern University, October 2010
  105. Topology Seminar, University of Chicago, October 2010
  106. Special Session on Combinatorics and Topology, AMS meeting, Syracuse, NY, October 2010
  107. Colloquium, University of Virginia, Charlottesville, VA, November 2010

    108. 2011
  108. Colloquium, Indiana University, Bloomington IN, February 2011
  109. Trjitnitsky Memorial Lectures, University of Illinois, Urbana-Champagne, February 2011
  110. Colloquium, University of Virginia, Charlottesville, VA, March 2011
  111. Colloquium, University of Tennessee, Knoxville, TN, April 2011
  112. Plenary Address, British Mathematical Colloquium, Leicester, England, April 2011
  113. Workshop on Coxeter groups, Artin groups, buildings and their automorphisms (3 lectures), Columbus, OH, April 2011
  114. Dynamics and Topology seminar, Marseilles, France, May 2011
  115. Journées d'inauguration de la Fondation mathématique Jacques Hadamard, Paris, France, May 2011
  116. Group Theory Day, Marseilles,France May 2011
  117. Geometric Group Theory conference, Haifa, Israel June 2011
  118. Plenary address, Dubrovnik VII - Geometic Topology conference, Dubrovnik, Croatia, June 2011
  119. British Topology Colloquium, Edinburgh, Scotland, August 2011
  120. European Math Society lectures at European Women in Mathematics meeting, Barcelona, Spain, September 2011
  121. Special session in Geometric Group Theory, AWM 40th Anniversary Celebration, Providence, RI September 2011
  122. Colloquium, Northwestern University, September 2011
  123. Colloquium, Tufts University, October 2011
  124. Colloquium, University of California, Berkeley, November 2011
  125. Colloquium, University of Rochester, Rochester, NY, December 2011

    126. 2012

  126. Tripode Grenoble-Lyon-Lyon, Lyon, France, January 2012
  127. Algebra Seminar, Cambridge University, Cambridge, England, February 2012
  128. European Math Society lectures, Oxford, England, February 2012
  129. Groups and Geometry in the Southeast, Oxford, England, February 2012
  130. Topology Seminar, University of Warwick, Warwick, England, February 2012
  131. Topology and algebra Seminar, Imperial College, London, England, February 2012
  132. European Math Society lectures, Mittag-Leffler Institute, Stockholm, Sweden, March 2012
  133. Groups 2012, Conference in honor of Bernd Fischer, Bielefeld, Germany, March 2012
  134. Colloquium, University of Copenhagen, Copenhagen, Denmark, April 2012
  135. Panorama of Topology, Conference in honor of William Browder, Princeton, New Jersey, May 2012
  136. Algebra and Geometry Seminar, KTH Stockholm, Sweden, May 2012
  137. von Neumann Conference, Muenster, Germany, May 2012
  138. Berlin Mathematical School Kovalevskaya Colloquium, Berlin, Germany, June 2012
  139. Topology and Groups Berlin Summer School (4 lectures), Freie Universitat Berlin, Berlin, Germany, June 2012
  140. Topology and Groups Berlin Conference, Freie Universitat Berlin, Berlin, Germany, June 2012
  141. Plenary Lecture, Young Mathematicians Conference, Ohio State University, Columbus, Ohio, July 2012
  142. Algebra Seminar, ETH Zurich, Zurich, Switzerland, October 2012
  143. Conference on Automorphisms of free groups: Algorithms, Geometry and Dynamics, Centre de Recerca Matematica, Barcelona, Spain, November 2012
  144. Cohomological methods in geometri group theory (2 lectures), Banff, Canada, November 2012