Complete list of given talks:                                                                                                                               (Back to currículum)

pdf, 178. "The central tree property and some average case complexity results for algorithmic problems in free groups", at the workshop New York Group Theory Seminar Complexity Day, New York, (USA), 12/23. VIDEO
pdf 177. "On the existence of finitely presented intersection-saturated groups", at the workshop Groups in Madrid 2023, Madrid (Spain), 10/23.
pdf 176. "Existence of finitely presented intersection-saturated groups", Geometry Seminar, Uniwersytet Wroclawski, Wroclaw (Poland), 6/2023.
pdf 175. "Existence of finitely presented intersection-saturated groups", XVI Barcelona Weekend in Group Theory, Barcelona (Catalunya), 5/2023.
pdf 174. "Existence of finitely presented intersection-saturated groups", Algebra, Combinatorics and Number Theory Seminar, Universidade do Porto, Porto (Portugal), 4/2023.
pdf 173. "Stallings automata and applications" (20 hours), BGSMath Graduate Course, shared with Jordi Delgado, Barcelona (Catalunya), January-February 2023.
pdf 172. "Finding the equations satisfied by a given element in a free group", at the workshop Equations in Groups and Complexity, Newcastle (UK), 7/2022.
pdf 171. "Twisted conjugacy and orbit decidability in groups", at the Algebra Seminar of the Chennai Institute of Mathematics, Chennai, India, 3/2022.
pdf 170. "The technique of Stallings graphs", at the Colloquium of the Chennai Institute of Mathematics, Chennai, India, 3/2022.
pdf 169. ``Relative order and spectrum of subgroups", at the Algorithmic problems in algebra and logic seminar (Adian's seminar) (online), Moscow, Russia, 11/2021.
pdf 168. ``The multiple endo-twisted conjugacy problem for free groups", GAGTA-14 Edimburgh (U.K.), 6/2021.
pdf 167. ``The degree of commutativity of an infinite discrete groups'', at the African Mathematics Seminar (online), University of Nairobi (Kenia), 5/2021.
pdf 166. ``Relative order and spectrum of subgroups", at the Heriot-Watt Algebra and Group Theory seminar, Heriot-Watt university, UK, 5/2021
pdf 165. "The degree of commutativity/nilpotency of an infinite group", at the "Workshop on Graphs, Topology and Topological Groups (online)", University of Cape Town, SouthAfrica, 3/2021.
pdf 164. Mini course "Stallings graphs and the lattice of subgroups of free groups", at the "Workshop on Graphs, Topology and Topological Groups (online)", University of Cape Town, SouthAfrica, 3/2021.
pdf 163. "Endomorphisms of direct products of free and surface groups, and their fixed points", at the Algebra Seminar, Universidade de Brasilia (Brasil), 10/2020.
  162.  "Recent advances on the inertia conjecture, I-IV", at  the Seminari de Teoria de Grups de Barcelona (Catalunya), 11/2019.
pdf 161. "The intersection problem in F_n x Z^m", plenary talk at the conference "SandGAL 2019, Semigroups and Groups, Automata, Logics” , Cremona (Italy), 6/2019.
  160.  "How to compute the stable image of an endomorphism ?", invited talk at the workshop "Algorithmic problems in Group Theory" held in Dagstuhl (Germany), 3/2019.
  159. "A short proof of Whitehead's cut vertex lemma", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 3/2019.
pdf 158. "The degree of commutativity/nilpotency of an infinite group", invited talk at the "Workshop on Groups, Automata, and Graphs", Graz (Austria), 2/2019.
  157. "Fixed subgroups in direct products of surface groups of Euclidean type, I, II", at the Seminari de Teoria de Grups de Barcelona (Catalonia), 11/2018.
pdf 156. "Vectored Stallings graphs", at the conference "Geometric and Asymptotic Group Theory with Applications" GAGTA-12, Seoul (South Korea), 7/2018.
  155. "Equations over subgroups of a  free group", talk at the Seminari de Teoria de Grups de Barcelona (Catalonia), 2/2018.
pdf 154. "Stallings graphs for (free abelian)-by-free groups", talk at the "Strukturtheorie-seminar" in the Institut für Diskrete Mathematik, Graz (Austria), 2/2018.
pdf 153. "The degree of commutativity/nilpotency of an infinite group", at the conference "Geometric and Asymptotic Group Theory with Applications" GAGTA-11, Bilbao (Spain), 7/2017.
  152. "Recent results about R_{\infty} property", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 5/2017.
  151. "The degree of commutativity/nilpotency of an infinite group I - IV", at the Seminari de Teoria de Grups de Barcelona (Catalonia), 3/2017.
pdf 150. "Stallings graphs for (free-abelian)-by-free groups", at the Pure Seminar Algebra and Geometry, Newcastle University, Newcastle, UK, 12/2016.
pdf 149. "Stallings graphs for (free-abelian)-by-free groups", at the MAXIMALS seminar, Heriot-Watt University, Edinburgh, UK, 11/2016.
pdf 148. "Automorphisms of free and surface groups and their fixed points", at the Geometric Group Theory Seminar of Cambridge University, Cambridge, UK, 11/2016.
pdf 147. "The degree of commutativity/nilpotency of an infinite group", at the North British Geometruc Group Theory Seminar, 2016, StAndrews, UK, 11/2016.
pdf 146. "Stallings graphs for (free-abelian)-by-free groups", at the Pure Colloquium of the University of Southampton, Southampton, UK, 10/2016.
pdf 145. "Fixed subgroups are compressed in surface groups", at the conference "Geometric and Asymptotic Group Theory with Applications" GAGTA-10, Stevens Institute, New York, (USA), 6/2016.
  144. "TCP is solvable for remnant endomorphisms of free groups", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 5/2016.
pdf 143. "Fixed subgroups are compressed in surface groups", talk at the Group Theory International Webinar, 4/2016.
pdf 142. "The degree of commutativity of an infinite group", at the "Informatik Kolloquium" of the Universität Stuttgart, Stuttgart, (Germany), 12/2015.
pdf 141. "The degree of commutativity of an infinite group", at the conference "Geometric and Asymptotic Group Theory with Applications" GAGTA-9, Lumini Marseille, (France), 9/2015. Video at CIRM.
pdf 140. "Automaton groups with unsolvable conjugacy problem", at the conference AMS/EMS/SPM International Meeting, Porto (Portugal), 6/15.
pdf 139. "Membership in the BNS invariant", at the conference AMS/EMS/SPM International Meeting, Porto (Portugal), 6/15.
pdf 138. "The conjugacy problem and other algorithmically related problems", plenary tallk at the first "Edimburg Mathematical Society - Societat Catalana de Matemàtiques joint meeting", Barcelona (Catalunya), 5/2015.
  137. "An introduction to the BNS invariant I - VI", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 4-5/2015.
  136. "Non-amenability of product replacement graphs", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 3/2015.
  135. "Limit groups I - VIII", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 10/14 to 12/2014.
pdf 134. "Commuting degree for infinite groups", at the algebra seminar from Dusseldorf Universität, Dusseldorf (Germany), 10/14.
pdf 133. "Commuting degree for infinite groups", at the conference "Geometric and Asymptotic Group Theory with Applications" GAGTA-8, Newcastle (Australia), 7/2014.
pdf 132. "Commuting degree for infinite groups", at the conference "Second Joint International Meeting IMU-AMS", Tel Aviv, (Israel), 6/2014.
pdf 131. "Inverting automorphisms of the free group", at the Barcelona Topology Seminar, (Catalunya), 5/2014.
  130. "About an strange actions of the free group recently found by Ol'shanskii I, II", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 4/2014.
pdf 129. "On the difficulty of inverting automorphisms of free groups", at the Magnus Seminar, New York (USA) 3/2014.
pdf 128. "Using graphs to understand the lattice of subgroups of a free group", at the Math Colloquium del City College of Technology, New York (USA), 3/2014.
  127. "On the difficulty of inverting automorphisms of free groups", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 3/2014.
pdf 126. "Orbit decidability and the conjugacy problem in groups", at the Algebra Seminar in Oxford (England), 2/2014.
pdf 125. "On the difficulty of inverting automorphisms of free groups", at the workshop "Groups and Geometry in the South East", Warwick (England), 2/2014.
  124. "TCP does not imply DTCP, I, II", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 11/2013.
pdf 123. "Using graphs to understand the lattice of subgroups of a free group", at the algebra seminar of Aalto University, Helsinki (Finland), 9/2013.
  122. "Counting primitive elements, the exact asymptotic amount", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 6/2013.
pdf 121. "Orbit decidability, applications and variations", al congrés "Geometric and Asymptotic Group Theory with Applications" GAGTA-7, City College of New York, New York (USA), 5/2013.
  120. "Verbally closed subgroups of free groups II", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 4/2013.
  119. "Verbally closed subgroups of free groups I", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 4/2013.
pdf 118.   "Most groups are hyperbolic... or trivial? It depends on the glasses in use...", Algebra seminar, Moscow State University, Moscow (Russia), 1/13.
  117. "Stalling sections and virtually free groups", at the "Closing Workshop on Automorphisms of Free Groups", Centre de Recerca Matemàtica, Barcelona (Catalunya), 12/2012.
pdf 116. "Stalling sections and virtually free groups", at the Manhattan Algebra Day, New York (USA), 12/2012.
pdf 115. "How are the majority of groups? It depends on the glasses in use...", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 10/2012.
pdf 114. "Unsolvability of CP and IP for automaton groups", at the conference "Geometric and Asymptotic Group Theory with Applications" GAGTA-6, Dusseldorf (Germany), 8/2012.
  113. "Friedman's proof of the Strengthened Hanna Neumann conjecture III-IV", at the Seminari de Teoria de Grups de Barcelona (Catalunya), 6/2012.
pdf 112. "The conjugacy and isomorphism problem for automaton groups", at the IX Encuentro en Teoria de Grupos, Madrid (Spain), 6/2012.
pdf 111. "Finite automata for Schreier graphs of virtually free groups", at the Fribourg Weekend in Group Theory, Fribourg (Switzerland), 5/2012.
  110. "Stallings sections and virtually free groups, I, II", at the Seminari de Teoria de Grups de Barcelona (Catalonia), 3/2012.
pdf 109. "Automaton groups with unsolvable conjugacy problem", at the meeting SAMS-AMS in Port Elizabeth (SouthAfrica), 11/2011.
  108. "The conjugacy problem in automaton groups is not solvable", at the Seminari de Teoria de Grups de Barcelona (Catalonia), 10/2011.
pdf 107. "The conjugacy problem in automaton groups is not solvable", at the Stevens online seminar, 10/2011.
pdf 106. "On the difficulty of inverting automorphisms of free groups", at the workshop "Journees sur Out(F_n)", Paris (France), 8/2011.
pdf 105. "On automorphisms of free groups", at the workshop "North British Geometric Group Theory Seminar", Newcastle (UK), 7/2011.
pdf 104. "On the difficulty of inverting automorphisms of free groups", at the conference "Geometric and Asymptotic Group Theory with Applications", Manresa (Catalonia), 7/2011.
pdf 103. "The lattice of subgroups of a free group", a research mini-course at the conference "Geometric and Asymptotic Group Theory with Applications", Manresa (Catalonia), 7/2011.
pdf 102. "On the difficulty of inverting automorphisms of free groups", at the workshop "Groups in Galway-2011", Galway (Ireland), 5/2011.
  101. "Inverting automorphisms of free groups I, II, III", at the Seminari de Teoria de Grups de Barcelona (Catalonia), 2/2011.
pdf 100. "Most groups are hyperbolic... or most groups are trivial ?", at New York City College of Technology, New York (USA), 11/2010.
pdf 99. "The conjugacy problem for some extensions of $F_n$, $Z^m$, $B_n$ and $F$", at Carleton University, Otawa (Canada), 11/2010.
pdf 98. "The conjugacy problem for some extensions of $F_n$, $Z^m$, $B_n$ and $F$", at the Urbana Group Theory Seminar (Illinois, USA), 10/2010.
pdf 97. "Whitehead's classical algorithm for subgroups", at the McGill algebra seminar, Montreal (Canada), 10/2010.
pdf 96. "Whitehead's classical algorithm and a modern version in polynomial time", at the McGill algebra seminar, Montreal (Canada), 9/2010.
pdf 95. "A recursive presentation for Mihailova's subgroups", at the conference "Geometric and Computational Group Theory with Applications", Montreal (Canada), 8/2010.
pdf 94. "The lattice of subgroups of free groups: algorithmic aspects", at the VIII Encuentro de Teoria de Grupos, Bilbao (Spain), 6/2010.
pdf 93. "Endofixedness and computation of fixed closures in free groups", at the workshop Automata, Semigroups and Application's Days, Porto (Portugal), 6/2010.
  92. "Hopfianicity of products and HNN extensions (I), (II)", at the Group Theory Seminar, CRM, Barcelona (Catalonia),  5/2010.
pdf 91. "Deciding endofixedness in free groups", at the London Mathematical Society Northern Workshop, Newcastle (UK), 4/2010.
pdf 90. "Most groups are hyperbolic... or most groups are trivial ?",  at the "Seminari de Teoria de Grafs de la UPC", Barcelona (Catalonia), 3/2010.
  89. "Most groups are hyperbolic... or most groups are trivial ? (I), (II), (III)", at the Group Theory Seminar, CRM, Barcelona (Catalonia),  2/2010.
  88. "Subgroups of $F_n$ generated by conjugates of powers of letters", at the Group Theory Seminar, CRM, Barcelona (Catalonia), 12/2009.
pdf 87. "Whitehead minimization in polynomial time", at the Algebra Seminar of the Technion, Haifa (Israel), 11/2009.
pdf 86. "Algebraic extensions of free groups with two applications", at the Math. Colloquium of Bar-Ilan University (Israel), 11/2009.
pdf 85. "Computing fixed closures in free groups", at the algebra seminar, Universitat de València (Catalan countries), 10/2009.
  84. "Computing fixed closures in free groups", at the Group Theory Seminar, CRM, Barcelona (Catalonia), 10/2009.
pdf 83. "Whitehead minimization and computation of algebraic closures in polynomial time", at the meeting New algebra-logical methods in solutions for systems of equations in algebraic structures, Omsk (Rusia), 8/09.
pdf 82. "Algebraic extensions and computations of closures in free groups", at the Oberseminar Computation Algebra and Number Theory, Düsseldorf (Alemanya), 5/09.
pdf 81. "Characterizing the solvability of the conjugacy problem in free-by-free and [free abelian]-by-free groups", at 1047 AMS meeting, Urbana, Illinois (USA), 3/09.
pdf 80. "Twisted conjugacy for free groups, and the conjugacy problem for some extensions of groups", at Bates College, Maine (USA), 3/09.
pdf 79. "Computing endo-fixed closures in free groups" at the Magnus Seminar CUNY, New York (USA), 3/09.
  78. "Twisted conjugacy for free groups, and the conjugacy problem for some extensions of groups" (4 hours), at McGill University (Canada), 3/09.
pdf 77. "Computing endo-fixed closures in free groups", at Southampton (England), 2/09.
pdf 76. "Some group-based cryptosystems", at the Cryptography Day, Zaragoza (Spain), 1/09.
pdf 75. "Deciding endo-fixedness", at the Workshop about Makanin-Razborov process at Alagna Valessia (Italy), 12/08.  
pdf 74. "Automata and algebraic extensions of free groups", at the "Sémianire Groupes, Géométrie et Logique" of the Université Claude Bernard, Lyon (France), 12/08.
  73. "Unsolvability of the conjugacy and the isomorphism problems for Z^n-by-free groups", at the Group Theory Seminar, CRM, Barcelona (Catalonia), 11/2008.
pdf 72. "Automata and group theory", at the workshop "Automata theoretic methods in group theory", Bratislava (Slovakia) 11/08.
  71 "Orbit decidability and a recursive presentation for Mihailova's group", at the Group Theory Seminar, CRM, Barcelona (Catalonia), 9/2008.
pdf 70 "Algebraic extensions in free groups" at the worksop "School on Algebraic Theory of Automata", University of Lisboa, 9/08.
pdf 69. "Deciding endo-fixedness", at the meeting "VI Jornadas de Matemática Discreta y Algorítmica", Universitat de Lleida (Catalunya), 7/08.
pdf 68. "The conjugacy problem for extensions of groups", at the Algebra and Geometry Seminar of the Bristol University (UK), 6/08.
  67. "On the Whitehead minimisation algorithm", at the Group Theory Seminar, CRM, Barcelona (Catalonia), 1/2008.
pdf 66. "Orbit decidability and the conjugacy problem", at the meeting "Combinatorial and Geometric Group Theory with Applications", Dortmund (Germany), 8/2007.
pdf 65. "The automorphism group of a free-by-cyclic group in rank 2", at the meeting "Primer Congreso Hispano-Francés de Matemáticas", Zaragoza (Spain), 7/2007.
pdf 64. "The first part of Whitehead's algorithmm made polynomial", at CIRM, Luminy (France), 2/2007.
  63. "La primera parte del algoritmo de Whitehead en tiempo polinomial", at the Algebra Seminar, University of Sevilla, Sevilla (Spain), 2/2007.
  62. "Criptografia basada en grupos", at the Algebra Seminar, University of Navarra, Pamplona (Spain), 2/2007.
  61. "El problema de la conjugación para grupos free-by-free", at the Algebra Seminar, University of Navarra, Pamplona (Spain), 2/2007.
  60. "Conjugacy problem, orbit decidability and variations on a construction of Miller", at the Group Theory Seminar, CRM, Barcelona (Catalonia), 1/2007.
  59. "The first part of Whitehead's algorithm made polynomial", at the "Mathematisches Kolloquium", Dortmund (Germany), 12/2006.
  58. "Complejidad de algoritmos y criptografia basada en grupos" at the meeting "Matemáticas en la Sociedad de la Información", Murcia (Spain), 11/2006.
  57. "The first part of Whitehead's algorithm made polynomial", at the conference "Second Czech-Catalan Conference in Mathematics", Barcelona (Catalonia), 9/2006.
  56. "More on the orbit-decidability and the conjugacy problem for free-by-free groups", at the conference "Geometric and Asymptotic Group Theory with Applications", Manresa (Catalonia), 9/2006.
  55. "The conjugacy problem for free-by-free groups and orbit decidability", at the conference "International Congress of Mathematicians ICM06", Madrid (Spain), 8/2006.
  54. "Grups lliures i grafs I i II", at the "Seminari de Matemàtica Discreta de la UPC", Barcelona (Catalonia), 1 i 2 /2006.
    53. "The conjugacy problem for free-by-free groups" a l'"Albany Mathematics Colloquium", Albany (USA), 10/2005.
  52. "Conjugacy problem and orbit decidability", al "1009th AMS meeting", Bard College, New York (USA), 10/2005.
  51. "The conjugacy problem for free-by-free groups" at the Magnus Seminar CUNY, New York (USA), 10/2005.
  50.  "On the conjugacy problem for some extensions of groups" at the conference "Asymptotic Group Theory and Cryptography", Piestany (Slovakia), 7/2005. 
  49. "On the Mean Dehn function for abelian groups" at the conference “Asymptotic and Probabilistic Methods in Geometric Group Theory”, Geneva (Switzerland), 6/2005.  
  48. "Fixed subgroups in free groups: current state" at the Group Theory Seminar, CRM, Barcelona (Catalonia), 5/2005.
  47. "La funció de Dehn promitja per a grups abelians" at the "Seminari de Teoria de Grafs de la UPC", Barcelona (Catalonia), 3/2005. 
  46. "Last results about fixed subgroups in free groups" at the "Algebra Seminar" Carleton University, Otawa (Canada), 1/2005. 
  45. "The mean Dehn function for abelian groups" at the "Montreal Geometric & Combinatorial Group Theory Seminar", McGill, Canada,1/2005. 
  44. "The conjugugacy problem for free-by-free groups" at the "Montreal Geometric & Combinatorial Group Theory Seminar", McGill, Canada, 1/2005. 
  43. "Free-by-cyclic groups have solvable conjugacy problem" at the conference "Geometric group theory, random walks and harmonic analysis", Cortona (Italy), 6/2004.
  42. "Dynamical structure of matrices over finite fields", at the Colloquium of the City College, City University of New York (USA), 4/2004.
  41. "Fixed subgroups after Bestvina-Handel theorem" at the "Algebra Seminar" of the Math Department, Salt-Lake City, Utah (USA), 4/2004.
  40. "Uniform non-amenability" at the "Algebra Seminar" of the Math Department, Urbana-Champaign, Illinois (USA), 4/2004. 
  39. "Fixed subgroups in free groups, I,II,III" at the "Algebra Seminar of the Math Department", Lincoln-Nebraska (USA), 2/2004.
  38. "Uniform non-amenability", at the "Algebra Seminar of the Math Department", Lincoln-Nebraska (USA), 1/2004.
  37. "Fixed subgroups are compressed in free groups", at the Magnus Seminar CUNY, New York (USA), 9/2003.
  36. "Modern consequences of the Takahasi Theorem", at the "Algebra Seminar of the Math Department", Lincoln-Nebraska (USA), 9/2003.
  35. "Graphical techniques for free groups", at the "Colloquium of the Math Department", Lincoln-Nebraska (USA), 9/2003.
  34. "Uniform non-amenability", at the "International Conference on Group Theory", Gaeta (Italy), 6/2003.
  33. "Uniform non-amenability", at the 986 AMS Meeting, New York (USA), 4/2003.
  32. "Subgroups fixed by endomorphisms and automorphisms of F_n", at the "Seminari d'Àlgebra de la UAB", Barcelona (Catalonia), 2/2002.
  31. "A description of auto-fixed subgroups of F_n", at the workshop "Goupes et Géométrie", Marseille (France), 2/2002.
  30. "Fixed subgroups in finitely generated free groups", at the "Albany Mathematics Colloquium", Albany (USA), 9/2001.
  29. "The density of graphical sets and primitive elements in the free group", at the "AMS Sectional Meeting, Nevada University", Las Vegas (USA), 4/2001.
  28. "On fixed subgroups of the free group after Bestvina-Handel theorem", at the "Algebra Seminar", Carleton University, Otawa (Canada), 4/2001.
  27. "A description of auto-fixed subgroups of the free group", at the "Topology Seminar", Cornell University, Ithaca (USA), 3/2001.
  26. "A description of auto-fixed subgroups in the free group", at the "Poincare Seminar", Rutgers University, Newark (USA), 3/2001.
  25, "Graphical techniques in free groups", at the "Mathematics Colloquia CCNY", New York (USA), 11/2000.
  24. "On intersections of fixed subgroups of the free group", at the "AMS Sectional Meeting, Columbia University", New York (USA), 11/2000.
  23. "Fixed subgroups in free groups" at the "Magnus Seminar", New York (USA), 10/2000.
  22. "Very few elements in the free group are primitive", at the "2000 Albany Group Theory Conference", Albany (USA), 10/2000.
  21. "On automorphism-fixed subgroups of a free group", at the conference "Combinatorial and Geometric Group Theory", Haifa (Israel), 6/2000.
  20. "El reticle de subgrups fixos d'un grup lliure", at the "Seminari de Teoria de Grafs de la UPC", Barcelona (Catalonia), 11/1999.
  19. "Dynamics of matrices over finite fields with an engineering application", at the conference "ILAS-99", Barcelona (Catalonia), 7/1999.
  18. "Intersections of fixed subgroups of a finitely generated free group", at the "Centre de Recerca Matemàtica", Barcelona (Catalonia), 5/1999.
  17. "On fixed subgroups of maximal rank", at the conference "Computational and Geometric Aspects of Modern Algebra", Edinburg (England), 7/1998.
  16. "On fixed subgroups of maximal rank", at the "Centre de Recerca Matemàtica", Barcelona (Catalonia), 12/1997.
  15. "Dinàmica de matrius sobre cossos finits", at the "Seminari de Teoria de Grafs de la UPC", Barcelona (Catalonia), 11/1997.
  14. "Dynamic structure of matrices over finite fields", at the conference "Encuentro de Análisis Matricial y Aplicaciones", Sevilla (Spain), 9/1997.
  13. "Grups Fixos" at the conference "Forum R+D Manresa", Manresa (Catalonia), 6/1997.
  12. "On fixed subgroups of maximal rank", at the "Seminari de Teoria de Grafs de la UPC", Barcelona (Catalonia), 3/1997.
  11. "Fixed points of endomorphisms of finitely generated free groups", at the '"Algebra Seminar, Boston University", Boston (USA), 2/1997.
  10. "On fixed subgroups with maximal rank", at the "Mathematics Seminar, SUNY-Albany", Albany (USA), 2/1997.
  9. "The train-track algorith and inertia of fixed subgroups", at the "Mathematics Seminar, Tufts University", Boston (USA), 1/1997.
  8. "Inertia and fixed subgroups", at the conference "Algebra and Discrete Mathematics: Group Theory, Finite to Infinite", Castelvecchio Pascoli (Italia), 7/1996
  7. "Grups lliures i grafs", at the "Seminari de Teoria de Grafs de la UPC", Barcelona (Catalonia), 3/1996.
  6. "Grups lliures i pull-back de grafs", at the "Seminari de Matemàtiques EUPM", Manresa (Catalonia), 5/1995.
  5. "Fixed groups of endomorphisms of free groups", at the conference "Geometry and Cohomology in Group Theory", Durham (England), 7/1994.
  4. "Fixed subgroup of a group of automorphisms of a free group I, II", at the "Seminari d'Àlgebra de la UAB", Barcelona (Catalonia), 6/1993.
  3. "Irreducible automorphisms of growth rate one", at the conference "III Week on Algebra and Algebraic Geometry", Tenerife (Spain), 6/1992.
  2. "Automorfismes de grups lliures", at the "Centre de Recerca Matemàtica", Barcelona (Catalonia), 5/1991.
  1. "Groups acting on two-dimensional CW-complexes I, II", at the "Centre de Recerca Matemàtica", Barcelona (Catalonia), 5/1990.

 


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