SEMINARS
“Weak dynamical Systems”, Ecole Polytechnique Centre de Mathématiques Appliquées, Paris, mai 1987.
“Åxistence Results for Éindefinite - Weight Semilinear Elliptic Problems”, Dept. of Mathematics, University of Bristol, 26th April 1994.
“Global Bifurcation Results for Indefinite - Weight Semilinear Elliptic Problems in ”, Dept. of Mathematics, University of Bath, 29th April 1994
“Åxistence Results for Semilinear Elliptic Problems on Unbounded Domains”, Dept. of Mathematics, Universite Toulouse I, 30th of June, 5th of July 1994.
“Global Bifurcation Results for a Semilinear Elliptic Problem in ”, Dept. of Mathematics and Computer Science, University of Leiden, 25th August 1994.
“Solutions of Some Elliptic Problems in Two Dimensional Unbounded Domains”, Dept. of Mathematics, Universite Toulouse I, 2nd of December 1994.
“Methods of Bifurcation for Nonlinear Elliptic Equations on all of ”, Dept of Mechanics, NTU Athens, March 27th, 1995.
"Existence and Simplicity of Principal Eigenvalues for some Quasilinear Elliptic Systems on ”, Dept. of Mathematics and Computer Science, University of Leiden, 10th July 1995.
"Global Bifurcation Results for Noncom pact Operators in Unbounded Domains”, Dept. of Mathematics, Universite Toulouse III, (Paul Sabatier), 19 November 1996.
“Hyperbolic Problems on all of : Existence, Asymptotic Behavior”, Dept. of Mathematics, Universite Toulouse I, 25 of November 1996.
“Engineering Mathematics and the Greek Experience: Special Case the Situation in NTUA”, Ecole D’ Ingeniers du Val de Loire-Blois, Universite Francois Rabelais de Tours, 3 Fevrier 1997.
"Global Bifurcation Results for a Semilinear Elliptic Problem in : Compact and Noncompact Cases", Laboratoire de Mathematiques et Applications, Universite Francois Rabelais de Tours, Jeudi 6 Fevrier 1997.
“Global Bifurcation Theory and Fredholm Operators in Unbounded Domains”, Mathematisches Institut der Universitt Basel, Montag, den 7. April, 1997.
“Global Existence, Blow-Up and Asymptotic Results for Kirchoff’s Equations on ”, Dept. of Applied Mathematics, University of Crete, Heraklion, Greece, Tuesday 25th of May, 2004.