Welcome to my homepage!

Postal address (office):
Ferenc Izsak
ELTE TTK
Department of Applied Analysis and Computational Mathematics
1518 BUDAPEST
P.O. Box 120

Physical address (office):
ELTE TTK
Department of Applied Analysis and Computational Mathematics
District XI. BUDAPEST
Pazmany P. stny. 1 C (the red building in the campus)
3rd floor, room 603

Phone (office): (36 1)3722500/8428

Fax (office): (36 1)3812158

E-mail: izsakf@cs.elte.hu
Besides English, you can write me sowohl auf Deutsch als ook op Nederlands.

PERSONAL

CV

REPORTS, PRESENTATIONS, PUBLICATIONS

Topic I. Delay differential equations

Journal articles:
1. F. Izsák, An existence theorem for Volterra integrodifferential equations with infinite delay, Elect. J. Diff. Eqs., Vol. 2003, No.4.
2. F. Izsák, An existence theorem for a type of functional differential equations with infinite delay, Acta Math. Hung., 108(1-2), 135-151, 2005.

Conference proceedings
1. Izsák, F. Volterra integrodifferential equations with infinite delay. EQUADIFF 2003, 1092--1097, World Sci. Publ., Hackensack, NJ, 2005.

Conference talks, seminars:
1. Volterra integrodifferential equations with infinite delay Equadiff, Hasselt (Belgium), July 2003
2. An existence theorem for a functional differential equation with infinite delay , Analysis Seminar, Leiden, June 2004

PhD thesis, short summary.
1. PhD thesis
2. a summary on 10 pages

Topic II. Simulation of chemical reactions, in particular pattern formation phenomena

Journal articles:
1. F. Izsák and I. Lagzi, Simulation of Liesegang pattern formation using a discrete stochastic model, Chem. Phys. Lett., 371, 321-326, 2003
2. I. Lagzi and F. Izsák, Stochastic description of precipitate pattern formation in an electric field, Phys. Chem. Chem. Phys., 5, 4144-4148, 2003
3. F. Izsák and I. Lagzi Precipitate pattern formation in fluctuating media, J. Chem. Phys., 120, 1837-1840, 2004
4. I. Lagzi and F. Izsák, Stabilization and destabilization effects of the electric field on stochastic precipitate pattern formation, Chem. Phys., 303, 151-155, 2004
5. I. Lagzi, F. Izsák, S.C. Müller and J. Ross, Comment on "Precipitate pattern formation in fluctuating media" [J. Chem. Phys. 120, 1837 (2004)], J. Chem. Phys., 121, 3943-3943, 2004
6. F. Izsak and I. Lagzi, Simulation of a crossover from precipitation wave to moving Liesegang pattern, J. Phys. Chem. A, 109, 730-733, 2005
7. F. Izsák and I. Lagzi, A new universal law for the Liesegang pattern formation, J. Chem. Phys., 122, 184707, 2005
8. M. Ripszám, A. Nagy, A. Volford, F. Izsák and I. Lagzi, The Liesegang eyes phenomenon, Chem. Phys. Lett., 414, 384-388, 2005
9. I. Lagzi and F. Izsák, Regular precipitation patterns and precipitation waves in an open system, Phys. Chem. Chem. Phys., 7, 3845-3850, 2005
10. A. Volford, F. Izsák, M. Ripszám and I. Lagzi Systematic front distortion and presence of consecutive fronts in a precipitation system, J. Phys. Chem. B, 110, 4535-4537, 2006
11. A. Volford, F. Izsák, M. Ripszám and I. Lagzi, Pattern formation and self-organization in a simple precipitation system, Langmuir, 23, 961-964, 2007
12. T. Szakály, I. Lagzi, F. Izsák, L. Roszol and A. Volford, Stochastic cellular automata modeling of excitable systems, Central European Journal of Physics (doi: 10.2478/s11534-007-0032-7)
A preprint of this paper.
13. F. Molnár Jr, F. Izsák, I. Lagzi, Design of equidistant and revert type precipitation patterns in reaction-diffusion systems, Phys. Chem. Chem. Phys., 10, 2368-2373, 2008
14. P.A. Zegeling, I. Lagzi and F. Izsák, Transition of Liesegang precipitation systems: simulations with an adaptive grid PDE method, Communications in Computational Physics, 10, 867-881, 2011
A preprint of this paper.
15. F. Molnár, F. Izsák, R. Mészáros and I. Lagzi, Simulation of reaction-diffusion processes in three dimensions using CUDA, Chemometrics and Intelligent Laboratory Systems, 108, 76-85, 2011.
16. N. Nagy and F. Izsák, Stability of reaction fronts in random walk simulations, Appl. Math. Res. Express 2011, doi: 10.1093/amrx/abr016

Conference talks, seminars, posters:
1. I. Lagzi, F. Izsák: Formation of Liesegang patterns: effect of electric field Gordon Research Conferences, Oscillations and Dynamic Instabilities in Chemical Systems, 28 July - 02 August, 2002, Oxford, UK (Poster)
2. I. Lagzi, F. Izsák: A stochastic model of the one-dimensional Liesegang pattern formation Nonlinear Phenomena in Chemistry; ESF REACTOR workshop, 24-27 January, 2003, Budapest, Hungary (Lecture)
3. I. Lagzi, F. Izsák: Crossover from precipitation wave to moving Liesegang pattern Gordon Research Conferences, Oscillations and Dynamic Instabilities in Chemical Systems, 18-23 July, 2004, Lewiston, Maine (Poster)
4. F. Izsák, I. Lagzi: A discrete stochastic model of the Liesegang phenomenon in an electric field Gordon Research Conferences, Oscillations and Dynamic Instabilities in Chemical Systems, 18-23 July, 2004, Lewiston, Maine (Poster)

Conference proceedings:
1. I. Lagzi and F. Izsák, Models of precipitation pattern formation in an electric field, in: 'Selforganization in Nonequilibrium Systems', S. Anic, Z. Cupic, L. Kolar-Anic (eds.), Society of Physical Chemists of Serbia, 166-169, 2004 ISBN 86-82475-15-4
2. I. Lagzi and F. Izsák, Micro and macro level stochastic simulation of reaction-diffusion systems, in: Proceedings of ALGORITMY 2005, Vysoke Tatry-Podbanske, A. Handlovicova, Z. Kriva, K. Mikula and D. Sevcovic (eds.), 185-193, 2005 ISBN 80-227-2192-1

Book sections:
F. Izsák and I. Lagzi, Models of Liesegang pattern formation, in: 'Precipitation Patterns in Reaction-Diffusion Systems', I. Lagzi (ed), pp. 207-217, 2011 ISBN 978-81-308-0420-0
A preprint of this section.

Topic III. Analysis of FE methods, in particular a posteriori error estimations

Journal articles:
1. Ferenc Izsák, Discontinuous Galerkin methods for partial differential equations in the atmospheric modeling, IDŐJÁRÁS Quarterly Journal of the Hungarian Meteorological Service, Vol. 110 (3-4) 2006, pp. 427-442
2. Jaap J. W. van der Vegt, Ferenc Izsák, and Onno Bokhove, Error Analysis of a Continuous-Discontinuous Galerkin Finite Element Method for Generalized 2D Vorticity Dynamics, SIAM J. Numer. Anal. Vol. 45(4) 2007, pp. 1349-1369
A preprint of this paper.
3. Izsák, Ferenc; Harutyunyan, Davit; van der Vegt, Jaap J. W. Implicit a posteriori error estimates for the Maxwell equations, Math. Comp. 77(263) 2008, pp. 1355-1386
A preprint with the proofs.
4. Davit Harutyunyan, Ferenc Izsák, Jaap J. W. van der Vegt and Mike A. Botchev, Adaptive finite element techniques for the Maxwell equations using implicit a posteriori error estimates, Comput. Methods Appl. Mech. Eng. 197(17-18) 2008, pp. 1620-1638
A preprint of this paper.
5. Domokos Sármány, Ferenc Izsák, Jaap J. W. van der Vegt, Optimal penalty parameters for symmetric discontinuous Galerkin discretizations of the time-harmonic Maxwell equations, J. Sci. Comput. 44(3) 2010, pp. 219-254
A preprint of this paper.
6. Tamás L. Horváth and Ferenc Izsák, Implicit a posteriori error estimation using patch recovery techniques, Cent. Eur. J. Math. 10(1) 2012, pp. 55-72

Conference talks, seminars, posters:
1. Numerical approximation of output functionals for Maxwell equations conference talk, Sunny beach, Bulgaria, September 2004
2. Implicit a posteriori error estimation for the time harmonic Maxwell equations (poster) 30th Woudschoten Conference, Dribergen-Zeist (Netherlands), October 2005
3. Implicit a posteriori error estimation for the time harmonic Maxwell equations conference talk, MAFELAP 2006, Brunel University (West London), June 2006
4. An h-adaptive vector finite element method for the time harmonic Maxwell equations (poster) 31st Woudschoten Conference, Dribergen-Zeist (Netherlands), October 2006
5. An h-adaptive vector finite element method for the time harmonic Maxwell equations conference talk, RMMM 2007, St. Petersburg, Euler Institute, July 2007
6. Explicit two-sided a posteriori error estimates for the time harmonic Maxwell equations (poster) 32nd Woudschoten Conference, Dribergen-Zeist (Netherlands), October 2007
7. A posteriori error estimation and h-adaptive vector finite element method for the time harmonic Maxwell equations presentation, Doktorandenseminar, Universit\"at Karlsruhe, 3rd December, 2007

Some temporal files .