2015  February 1620th, CRM of Montréal, Regulators, Mahler measures, and special values of Lfunctions 
 January 14th, MPIM Bonn, Seminar on recurrences and Lvalues, talk ''Explicit padic unitroot formulas for hypersurfaces'' 
2014  November 10, University of Warwick, Number Theory Seminar 
 September 1 12, ICTP Trieste, Lfunctions and modular forms
Notes of my course on MonskiWashnitzer cohomology and Kedlaya's algorithm for counting points on hyperelliptic curves over finite fields 
 August 18  22, MSRI Berkeley, New Geometric Methods in Number Theory 
 June 2327, IHES BuressurYvette, Algebra, Geometry and Physics 
 April 3, Dublin Area Mathematics Colloquium, talk ''Counting points over finite fields on CalabiYau hypersurfaces'' 
 March 29, UCD Algebra and Number Theory Seminar, talk ''Congruences for the constant terms of powers of a Laurent polynomial'' 
2013  July 1420th, Oberwolfach, Explicit methods in number theory 
 July 1012th, Utrecht, Special functions and special numbers 
 June 1520th, Saariselkä, Arctic Number Theory Workshop 
 March 1114th, Dublin, 27th Automorphic Forms Workshop [slides] 
2012  December 15th  21st, Bonn, Galois representations and pencils of CalabiYau motives [slides] 
 November 59th, Paris, Hypergeometric motives 
 August 26th  September 1st, Oberwolfach, Lowdimensional topology and number theory 
 July 26th, ICMAT Madrid, Periods and motives: a modern perspective on renormalization [slides] 
 June 2529th, ICTP Trieste, Hypergeometric motives 
 June 1314th, Irish Geometry Conference, University College Cork 
 May 29th  June 1st, 2012, Paris, Hypergeometric series and their generalizations in algebra, geometry,
number theory and physics 
 April 5th, Dublin, KTheory, Quadratic Forms and Number Theory seminar at UCD

 March 2328, MPIM Bonn, Motivic structures on quantum cohomology 
 February 27th  March 1st, 2012, Cologne, Modular forms, mock theta functions, and applications [slides] 
2011  July 17th  July 23rd, 2011, Oberwolfach, Explicit methods in number theory [slides] 