2022

• AMS Spring Eastern Virtual Sectional Meeting.
  Voltage operations, part 1. 

• Abstract polytopes and related topics Seminar. Northeastern University.
  Polytopes, graphs and groups.

2021

• Discrete Geometry Seminar, FU Berlin.
  Twisted honeycombs revisited: chirality in polytope-like structures.

• VI Congreso Latinoamericano de Matemáticas (CLAM). Uruguay.
  Mini course: Twisted honeycombs revisited: chirality in polytope-like structures.

2020

• Hablando de Matemáticas, Instituto de Matemáticas y Facultad de Ciencias, UNAM.
  Poliedros regulares.

• Seminario de Álgebra y Geometría de la Unidad Cuernavaca del Instituto de Matemáticas, UNAM.
  Panles torcidos y quiralidad.

2019

• 8th Slovenian International Graph Theory Conference. Bled, Slovenia.  Special session in honour of Branko Günbaum.
  Chiral polyhedra in three dimensional spaces.

• Coloquio Iberoamericano de Álgebra. Ciudad de México, México. Special session on algebraic combinatorics.
  Abstract polytopes and their groups.

• Semana de Matemáticas. ITAM. Ciudad de México, México.
  Poliedros altamente simétricos.

2018

• 41 Australasian Conference on Combinatorial Mathematics and Combinatorial Computing. Rotorua, New Zealand.
  Plenary talk: Graphs, groups and polytopes.

• 6th Workshop on Symmetries of Maps, Graphs and Polytopes. Morelia, México.
  Plenary talk: Twisted honeycombs revisited.

• Department Colloquia. University of Auckland. Auckland, New Zealand.
  Chirality: Twisted honeycombs revisited.

2017

• 75 years of Mathematics in Mexico. Ciudad de México.
  Twisted honeycombs revisited.

• PRIMA. Oaxaca, México.
  Arc transitive maps with underlying Rose Window Graphs.

2016

• Symmetries and Covers of Discrete Objets. Queenstown, New Zealand.
  Plenary talk: Chirality in abstract polytopes. 

• Women in Mathematics in Latin America: Barriers, Advancements and New Perspectives. BIRS Casa Oaxaca, Mexico.
  El cubo de Roli.

2015

• Algebra and geometry seminar. Universidad de Aveiro, Aveiro, Portugal.
  Chiral projective polyhedra.

• Seminarie du GT Combi du Plateau de Saclay. Ecole Polytechnique, Palaiseau, France.
  Chiral symmetry in abstract polytopes.

• Symmetry and Geometry, a conference on the occasion of Karoly Bezdek and Egon Schulte´s 60th birthdays. University of Pannonia, Veszprem, Hungary.
  Abstract polytopes and maniplexes.

• Discrete Geometry and Symmetry workshop. Banff International Research Station for Mathematics Innovation and Discovery; Banff, Canadá.
  Products on polytopes. 

• Discrete Mathematics Seminar, Faculty of Education, University of Ljubljana, Ljubljana, Slovenia.
  Symmetries of {4,4} maps.

2014

• Escuela de Matemáticas de América Latina y el Caribe (EMALCA). Tuxtla Gutierrez, México.
  De los sólidos platónicos a los politopos quirales proyectivos.

• Symmetries of Graphs and Networks VI. Rogla, Elsovenia.
  Realizations of {4,4} toroidal maps.

• Geometry-Algebra-Singularities-Combinatorics Seminar, Northeastern University. Boston.
  Chiral Polytopes and Alternating Groups.

2013

• Coloquio Victor Neumann-Lara de Teoría de las Gráficas, Combinatoria y sus Aplicaciones; Morelia, Michoacán.
  Plenary talk: Poliedros proyectivos altamente simétricos.

• Retrospective workshop on Discrete Geometry, Symmetry and Optimization. Fields Institute, Toronto, Canada.
  Chiral projective polytopes.

• AMS Spring Eastern Meeting. Special session in Discrete Geometry of Polytopes. Boston.
  Some relations among equivelar 3-toroids.

• Coloquio del posgrado conjunto en Matemáticas UNAM-UMSNH; Morelia, Michoacán.
  ¿Politopos quirales?

2012

• XLV Congreso Nacional de la Sociedad Matemática Mexicana. Sesión del área de Matemáticas discretas. Querétaro, Qro.
  ¿Politopos quirales?

• Coloquio del Instituto de Matemáticas, UNAM, México D.F. Poliedros proyectivos con caras cuadrangulares.

• Departamental Colloquium; University of Auckland, Auckland, Nueva Zelanda. Symmetries of cubical toroids.

2011

• Workshop on Symmetry of Maps, Graphs and Polytopes. Fields Institute; Toronto, Canada.
  Colourful Polytopes and Graphs.

• Workshop on Rigidity and Symmetry. Fields Institute; Toronto, Canada.
  Plenary talk: Equivelar 4-twistoids.

2005 to 2010 

• 7th Australia-New Zealand Mathematics Convention. Special session in Group Actions and Representation Theory; Christchurch, New Zealand.
  Monodromy groups of polytopes and self-invariance. 

• 2006 AMS Meeting. Special Session in Discrete and Convex Geometry; Durham, USA.
  On fully-transitive maps.

• CMS Summer Meeting 2005. Special session in Discrete and Computational Geometry; Waterloo, Canada.
  Chiral maps from 4-polytopes. 

• Convex and Abstract Polytopes Meeting. Banff International Research Station for Mathematics Innovation and Discovery; Banff, Canadá.
  Petrie-Coxeter maps revisited.

• Seminario CIMA; Universidad Autónoma del estado de Hidalgo. Pachuca, Hidalgo.
  Una introducción a poiltopos (abstractos) y sus simetrías. 

• Combinatorics Seminar; University of Ljubljana; Ljubljana, Eslovenia.
  Highly symmetric polytopes and their groups. 

• An afternoon on polytopes of the Geometry Seminar. Universtié Libre de Bruxelles, Bruselas, Bélgica.
  On two-orbit polytopes.

• Statistical Mechanics and Combinatorics Seminar; Department of Mathematiccs, University of Melbourne, Melbourne, Australia.
  Polytopes and their symmetries. 

•  Department of Mathematics Seminar; University of New Brunswick, Fredericton, Canadá.
  Two-orbit polytopes.