Introduction
I am a doctor in computer science and associated member at Laboratoire d'Informatique, de Traitement de l'Information et des Systèmes (LITIS) at the university of Le Havre, France. I was working on combinatorics and complex systems modelling. I am also president of Franco-Kurdish Educational, Scientific and Cultural Center KESCC Paris and I have published many political and social articles about Iraq and Kurdistan region.
Master Thesis
Mon mémoire porte sur la combinatoire des permutations et des tableaux de Young. En 1961, Schensted établit une relation bijective entre les permutations du groupe symétrique et les paires de tableaux standards de même forme, connue sous le nom de correspondance de Robinson-Schensted et il donne une preuve combinatoire de cette identité. En 1992, Herbert S.Wilf a mis en évidence une intéressante identité relative à deux problèmes d'énumération dans la théorie des fonctions symétriques, en terme de permutations dont les sous-suites croissantes sont de longueur bornée et de tableaux Young standard de hauteur bornée. Il en a donné une preuve algébrique en ayant recours au calcul formel. L'objectif de ce travail est d'apporter une preuve combinatoire de l'identité de Wilf et d'explorer d'autres problèmes, notamment celui d'en obtenir une extension.
PhD. Thesis
My work concerns the dynamics of some data structures and complex systems. We presented a combinatorial approach of tableaux and permutations based on dynamics. The second application deals with the evolution of genetic automata populations. These populations are studied by spectral analysis. Experiments are given on probabilistic automata whose evolution results in controlling dissipation by auto-regulation. The aim of this work is to give some computation tools related to the dynamics of data structures to analyze the complexity of systems.
Book
"Dynamic Data Structures for Complex Systems"
Author : Dr. Luai Jaff
Publisher : Edilivre Edition, November 2008, Paris
You can buy it from these links :
Scientific works
Publications, Conferences and Scientific Works
- L. Jaff, G.H.E. Duchamp, H. Hadj-Kacem and C. Bertelle. "Moderate Growth Time Series for Dynamic Combinatorics Modelisation" in Proceedings of ICELM-2, pp 42-53, Tirgu-Mures, Romania, May 31 - June 3, 2006.
- L. Jaff, Cyrille Bertelle and Gerard H.E. Duchamp. "Control on System Diffusion Using Genetic Automata" ESM07, October 22-24, St.Julians, Malta, 2007.
- L. Jaff, G.H.E. Duchamp and C. Bertelle."Shift Operators and Complex Systems", Inderscience Publishers, Int. Journal of Modeling, Identification and Control, Special Issue "Modelling Complex Systems", 2008.
- April 27, 2004 : Standard Tableaux and Permutations, work presented at group de travail des thésards, LJLL, University of Paris VI, Paris.
- March 2004, Mathematics and Finance, Conference organized by Eroplace institute, Paris.
- November 14-18, 2005 : EPNADS'05, Emergent Properties in Natural and Dynamical Systems, With ECCS'05 International Conference, Paris.
- February 28, 2006 : Combinatorics of Young Tableaux, work presented at group de travail CIP, Institut Galilée, LIPN, University of Paris XIII.
- March 09, 2006 : Seminar at laboratoire de Mathématiques appliquées du Havre, Le Havre University, France.
- March 14, 2006, Combinatorics and Oscillating Tableaux, work presented at group de travail CIP, Institut Galilée, LIPN, University of Paris XIII.
- May 31, 2006 : Poster, Trajectories Coding Three Ballots Like Structures, Poster presented at the journée de l'école doctorale de l'institut Galilée, University of Paris XIII.
- June 06, 2006 : A Code for Three Ballots Like Structures, work presented at journée de rencontre des doctorants, Institut Galilée, LIPN, University of Paris XIII.
- October 23-25, 2006 : A workshop for ESM 2006 CoSSoM'06 Complex Systems and Selforganization Modelling", LAAS, Toulouse, France.
- Increasing Subsequences and the Shape of Tableaux, Labri, University of Bordeaux, 2003.
- Phenomenology of Young Tableaux Sand Pile Model, LITIS, Le Havre University, 2006.
- Complex Systems and Economy, Institut Galilée, LIPN, University of Paris XIII, 2006.
- Complex Systems and Financial Markets, LITIS, University of Le Havre, 2009.
- Politics as a Complex Systems, LITIS, University of Le Havre, 2010.
Research Projects
Research Projects
The financial market today possed a very large tools to simulate some phenomena which we can not control it by the classical methods. This tools has sometimes advantages and disadvantages. For example, some model describe with precision the option prices, but we prefer Black-Scholes model to calculate option prices which is not more perfect than other models. It is simple and more near to reality. In the real financial market, we have the agents who are homo sapiens and not the homo economicus, so we have to make face to some dificult situations. The experimentations in the laboratory is useful to give us some predictions and expectations about the phenomena which we try to understand but these experimentations will not be exactly conform to the reality, in particular, in the world of finance. An innovative process could be to use spectral analysis as developed in the previous chapter to control the dissipative phenomena involved in financial market evolution.