27th Biennial Numerical Analysis Conference, 27-30 June 2017, University of Strathclyde, Glasgow (UK). (plenary)

Numoc 2017, June 19-23 2017, Rome. (invited)

Math. Dept, Politecnico di Torino, June 14, Torino. (invited)

CIRM Conference on Numerical Linear Algebra and Applications. Oct. 24-28, 2016. Marseille, France. (invited)

Dipartimento di Matematica, Universita' di Padova Oct. 14, 2016.

Johann Bernoulli Institute for Mathematics and Computer Science, University of Groningen (NL), Sept. 22, 2016. (invited)

Conference on Complex Systems, Sept 19-22, 2016. Beurs Van Berlage, Amsterdam, NL. (invited)

5th IMA Conference on ``Numerical Linear Algebra and Optimization'', University of Birmingham, UK, 7 - 9 September 2016

5th ALAMA Conference on Linear Algebra, Matrix Analysis and Applications, University of Leon, Spain, 20 - 22 June 2016 (plenary)

9th Workshop SDS2016 Structural Dynamical Systems: Computational Aspects, Capitolo, Monopoli (I), June 14-17, 2016. (invited)

SIAM Conf. Uncertainty Quantification, Lausanne, April 5-8, 2016. (minisymposium)

XX Congresso dell'Unione Matematica Italiana, Siena, 7-12 Settembre 2015. (plenary talk)

Calcolo scientifico e modelli matematici: alla ricerca delle cose nascoste attraverso le cose manifeste, 3-6 June 2015, Genova, Italy. (invited talk)

High performance computing in science and engineering, Karolinka, May 25-28, 2015, Czech Republic. (plenary)

Numerical Algebra, Matrix Theory, Differential-Algebraic Equations, and Control Theory, Home page TU Berlin, May 6-9, 2015, Germany. (plenary)

March 27, 2015, Dept Math Sciences, University of Bath. (invited talk)

March 23, 2015, Math Dept, University of Manchester. (invited talk)

March 6, 2015, IMATI-CNR, Pavia. (invited talk)

Nov 7, 2014, Dipartimento di Ingegneria Industriale, Universita' degli Studi di Firenze (invited talk)

Oct 2, 2014, Computer Science Dept., University of Maryland (USA). (invited talk)

SIAM Annual Meeting, July 7-11, 2014, Chicago (USA). (minisymp)

Workshop on Matrix Computations for Sparse Recovery, April 9-11, 2014, Berlin (D).

Workshop on PDE-Constrained Optimization, 6-7 March 2014, Linz, Austria. (workshop by invitation)

Workshop on Matrix Equations and Tensor Techniques, 10-11 October 2013, EPFL Lausanne, CH. (workshop by invitation)

IFIP TC 7 / 2013 System Modelling and Optimization, 9-13 Sept 2013, Klagenfurt, Austria. (minisymp)

GAMM Workshop Applied and Numerical Linear Algebra, September 9th-10th 2013, Bergische Universitaet Wuppertal, D. (plenary)

ENUMATH 2013, 26-30 August 2013, Lausanne, CH. (minisymp)

25th Biennial Conference on Numerical Analysis, 25-28 June 2013, Dept. Math. and Stat., University of Strathclyde (UK). (minisymp)

International Spring School on Matrix Functions and their applications (SSMF2013), Laboratoire Paul Painleve' UMR 8524 Universite' de Lille 1, FRANCE, 15-17 May, 2013. (4-hour lecture)

Topics in Mathematics, Dipartimento di Matematica, UniBO, May 8, 2013. (seminar)

Advances in Matrix Functions and Matrix Equations. Manchester, UK. April 10-12, 2013. (invited)

ATMW Numerical Linear Algebra, IIT Guwahati, Assam, India, Jan 15-18th, 2013. (plenary)

CTAC, 16th Biennal Computational Techniques and Appl. Conference, Brisbane (AU) 23-26 Sept, 2012. (plenary)

SIAM Annual Meeting (AN12). Minneapolis, Minnesota. July 9-13, 2012. (plenary)

SIMAI 2012, Biannual Meeting, Politecnico di Torino, June 25-29, 2012. (plenary)

SIAM Conference on Applied Linear Algebra, June 18-22, 2012 Valencia, Spain. (minisymp)

Swiss Numerics Colloquium 2012, April 13, 2012 Bern (plenary)

MOPNET: EPSRC Matrix and Operator Pencil Network. Meeting 6: April 2-3, 2012, Bath (UK). (invited)

GAMM Annual Meeting, March 26-30, 2012, Darmstadt (D). (minisymp)

ENUMATH 2011, Leicester, 5-9 Sept 2011. (plenary)

ICIAM 2011, Vancouver, 18-22 July 2011. (minisymp)

ICIAM 2011, Vancouver, 18-22 July 2011. (minisymp)

ICIAM 2011, Vancouver, 18-22 July 2011. (minisymp)

SIAM Conference on Computational Science and Engineering (CSE11) February 28, 2011 - March 4, 2011, Reno, Nevada (minisymp)

Mathematics Department, Temple University, Philadelphia, Feb. 23, 2011.

Model Reduction for Complex Dynamical Systems. December 2-4, 2010, TU Berlin, Germany.

"Optimization, Design and Control" 16-17th September 2010, Oxford. (slides not yet available)

Second IMA Conference on Numerical Linear Algebra and Optimisation, University of Birmingham, Sept. 13-15, 2010. (plenary)

Erice 2010 Workshop on Nonlinear Optimization, Variational Inequalities and Equilibrium Problems, July 2-10, 2010. (plenary)

Intl. Workshop on Accurate Solution of Eigenvalue Problems VIII (IWASEP VIII), Berlin (D), June 28-July 1, 2010 (plenary)

Progetto Lauree Scientifiche, Dipartimento di Matematica, Universita' di Bologna, Marzo 2010.

IMATI-CNR, Pavia, Dec. 1, 2009.

Schlumberger-Doll Research Center, Cambridge, Boston, Nov 3, 2009.

Conference of the Dutch-Flemish Numerical Analysis Communities, Zeist, Netherlands October 7-9, 2009. (plenary)

9th GAMM Workshop on Applied and Numerical Linear Algebra, Zurich, Switzerland, September 10 - 11, 2009. (plenary)

Preconditioning Techniques For Scientific And Industrial Applications, August 24-26, 2009 Hong Kong. (plenary)

ENUMATH 2009, Uppsala University - Sweden, June 29 - July 3, 2009 (minisymp)

CICADA MIMS workshop on Numerics for Control and Simulation June 17, 2009.

Advances and Perspectives on Numerical Methods for Saddle Point Problems, Banff (Canada), 13-17 April 2009.

"Methods and algorithms for solving large algebraic systems on modern high performance computing systems", School CEA-EDF-INRIA, March 30 - April 3, 2009, INRIA, Sophia-Antipolis (F). (school lectures)

Institut fuer Mathematik. TU-Berlin, Jan 27, 2009.

Math. Dept., Wuppertal University, Jan 15, 2009.

Dipartimento di Ingegneria Strutturale, Politecnico di Milano, Nov 5, 2008.

Invited Session devoted to prof. G. Cimmino. XXXIX Annual Conference of Italian Operational Research Society (AIRO), Ischia (NA), 8-11 Sept. 2008.

Householder Symposium XVII, June 1-6, 2008, Zeuthen (D). (plenary)

MIMS New Directions Workshop Functions of Matrices, The University of Manchester, May 15-16, 2008.

GAMM Annual Meeting, Bremen, 31 March - 4 April 2008.

Universite' de Nice Sophia Antipolis, March 13, 2008.

Convegno biannuale del GNCS-Indam, Montecatini, 4-6 February 2008. (plenary)

Workshop on "Matrix Analysis and Applications", CIRM Luminy, France, 15-19 October 2007.

Istituto di Matematica, Universita' di Roma ''La Sapienza'', 22 Maggio 2007.

Workshop on "Structured Perturbations, and Distance Problems in Matrix Computations", Math. Research and Conference Center, Bedlewo, Poland, 26-30 March 2007

Third Berlin-Manchester Workshop on Nonlinear Eigenvalue Problems, University of Manchester, March 22-23, 2007.

Mathematics Institute, TU-Berlin, 6 December 2006.

SIAM-GAMM Applied Linear Algebra 2006, Duesseldorf, July 24-27, 2006. (plenary)

ILAS 2006, Amsterdam, July 18-21, 2006. (plenary)

ICCAM 2006, Leuven (B), July 10-14, 2006. (plenary)

Dipartimento di Energetica "Stecco", Universita' di Firenze, July 4, 2006.

Dipartimento di Ingegneria Strutturale, Politecnico di Milano, May 30, 2006.

Math.Department, University of Bath, April 28, 2006, Bath, UK.

GAMM Annual Meeting 2006, Berlin, March 27-31.

Department of Mathematics, Temple University, Philadelphia. March 1, 2006.

Model order reduction, coupled problems and optimization, Lorentz Center, Sept. 19-23, 2005, Leiden (NL).

Math.Department, University of Duesseldorf, July 25, 2005, Duesseldorf, D.

Workshop on Finite Elements and Fast Iterative Solvers, July 4-5, 2005, Manchester, UK.

Structural Dynamical Systems: Computational Aspects (SDS2005), June 26-29, 2005, Capitolo, Bari, Italy.

Dipartimento di Matematica, Universita' di Brescia, June 21, 2005, Italy.

Householder Symposium XVI, May 23-27, 2005, Seven Springs Mountain Resort, Champion, PA (USA).

Int'l Conference on Preconditioning Techniques For Large Sparse Matrix Problems , Atlanta, May 19-21, 2005.

GAMM Annual Meeting, Luxemburg, March 28 - April 1, 2005

Universita' di Roma ''La Sapienza'', 8 March 2005.

Institute fuer Mathematik, TU - Berlin, 24 November 2004.

3rd International workshop on Parallel Matrix Algorithms and Applications (PMAA'04), 18-22 October, CIRM, Luminy, France, 2004

GAMM Workshop Applied and Numerical Linear Algebra, 2-3 July. 2004, Hagen, Germany.

V International Workshop on Accurate Solution of Eigenvalue Problems, 28 June-1 July. 2004, Hagen, Germany.

Dipartimento di Matematica, Universita' di Bari, 20 Aprile 2004.

Dipartimento di Matematica, Universita' di Bari, 19 Aprile 2004.

Due Giorni di Algebra Lineare Numerica, Udine, Jan. 22-23, 2004.

Solution Methods for Saddle Point Systems in Computatonal Mechanics Workshop, Santa Fe (NM) Dec. 3-6, 2003.

CAPI 2003: Calcolo ad Alte Prestazioni, Milano, Nov. 13-14, 2003.

Theoretical and Computational Aspects of Matrix Algorithms, 12-17 October 2003, Schloss Dagstuhl (D), Oct. 2003

XXI Int'l IAC Workshop. Numerical Linear Algebra and its Applications, Monopoli, Bari (Italy). Sept. 2003.

XXI Int'l IAC Summer School. Numerical Linear Algebra and its Applications, Monopoli, Bari (Italy). Sept. 2003.

SIAM Conference on Applied Linear Algebra, Williamsburg (VA), July 2003.

(with D. Szyld) Sparse days at St. Girons (F), June 2003.

Mathematics Department, Utrecht University (NL), May 2003.

Computer Science Dept., University of Maryland, Sept. 2002.

Computational Linear Algebra and Applications, Milovy (CZ), Aug. 2002.

Householder Symposium, Peebles, Scotland, June 2002.

Oxford University Computing Laboratory, Oxford, May 2002.

Math. Dept., UMIST Manchester, May 2002.

(with D. Szyld) Conf. 50 years of CG, 70 years of G. Golub, Zurich, Feb. 2002.

"Due-giorni di Algebra Lineare Numerica", Pisa, Jan. 2002.

Universita' "La Sapienza", Roma, Jan. 2002.

University of Freiberg, Germany, Nov. 2001.

(with M. Pennacchio) GAMM Workshop on Numerical Linear Algebra, Berlin, Sept. 2001.