Josef Obermaier

Institute

Institute of Computational Biology

Research group

Interactions in Biological Systems

Contact

 phone        ++49 +89 3187 4486 
 office phone ++49 +89 3187 4030 (Mrs. N.M. Kluscke)
 fax          ++49 +89 3187 3029 
 e-mail       josef.obermaier@helmholtz-muenchen.de

 German address 
 Helmholtz Zentrum München 
 Deutsches Forschungszentrum fuer Gesundheit und Umwelt,GmbH
 Institut für Biomathematik und Biometrie
 Ingolstädter Landstrasse 1
 85764 Neuherberg

 International address 
 Helmholtz Zentrum München
 German Research Center for Environment and Health
 Ingolstädter Landstrasse 1
 85764 Neuherberg
 Germany

Research interests

• Orthogonal polynomials
• Harmonic analysis
• Density estimators

Publications

• Lasser, R., Obermaier, J.: The influence of the incubation period on qualitative aspects of the spread of AIDS. Biometrical Journal, 31, 833-839 (1989)
• Obermaier, J.: Modifizierte Fejér-Kerne für polynomiale Hypergruppen; Approximations- und Darstellungssätze. Dissertation, Technische Universität München, 1990
• Lasser, R., Obermaier, J.: On Fejér means with respect to orthogonal polynomials: A hypergroup theoretic approach. Journal of Approximation Theory, special Volume 'Progress in Approximation Theory', 551-565 (1991)
• Lasser, R., Obermaier, J., Strasser, W.: On the consistency of weighted orthogonal series density estimators with respect to -norm. Journal of Nonparametric Statistics 3, 71-80 (1993)
• Lasser, R., Obermaier, J., Rediske, G., Welzl, G.: Statistische Untersuchungen zum Krankheitsverlauf der AIDS-Erkrankung. GSF-Bericht 10/93, 1993
• Obermaier, J., Welzl, G.: Zur Analyse klinischer HIV-Daten. Proceedingsband 38. Jahrestagung der GMDS, pp. 525-528, MMV Medizin Verlag München, 1994
• Lasser, R., Obermaier, J.: On the convergence of weighted Fourier expansions with respect to orthogonal polynomials. Acta Scientiarum Mathematicarum (Szeged) 61, 345-355 (1995)
• Germain Aids Study Group GASG/IdkF, Obermaier, J., Welzl, G.: Observational Analysis of German Injecting Drug Users (IDU): Survival with and without Metadone Maintenance Treatment. European Journal of Medical Research 1, 209-214 (1996)
• Hoffmann-Fezer, G., Trastl, C., Beisker, W., Berg, D., Obermaier, J., Kessler, W., Mysliwietz, J., Schumm, M., Filser, J., Thierfelder, S.: Preclinical evaluation of biotin labeling for red cell survival testing. Annals of Hematology 74, 231-238 (1997)
• Kuehn, W., Anders, H.J., Bogner, J.R., Obermaier, J., Goebel, F.D. & Schlöndorff, D.: Hypocalcemia in HIV Infection and AIDS. Journal of Internal Medicine 245, 69-73 (1999)
• Obermaier, J., Welzl, G.: An expected confidence interval for the median. Preprintreihe des IBB (1999)
• Franz, M., Obermaier, J., Kremmer, E., Günther, W., Kasper, M., Josten, B., Hähnle, C., Vogl, C., Hoffmann-Fezer, G.: Normal values of some subpopulations of dog peripheral blood lymphocytes. (submitted to Veterinary Immunology and Immunopathology)
• Filbir, F., Lasser, R., Obermaier, J: Summation kernels for orthogonal polynomial systems. CRC Handbook on Analytic Computational Methods in Applied Mathematics., pp. 707-749, Chapman and Hall, 2000
• Lasser, R., Obermaier, J: Orthogonal expansions for Lp- and C-spaces. Proceedings of the International Workshop on Special Functions in Hong Kong,pp. 194-206, World Scientific,2000
• Obermaier, J.: The de la Vallée-Poussin kernel for orthogonal polynomial systems. Analysis 21, 277-288 (2001)
• Lasser, R., Obermaier, J.: Characterization of Blackman kernels as approximate identities. Analysis 22, 13-19 (2002)
• Lasser, R., Mache D.H., Obermaier, J.: On Approximation Methods by using Orthogonal Polynomial Expansions. In: International Series of Numerical Mathematics, Advanced Problems in Constructive Approximation,pp. 95-107, Birkhäuser Verlag, 2002
• Lasser, R., Obermaier, J.: Selective approximate identities for orthogonal polynomial sequences. Journal of Mathematical Analysis and Applications 279, 339-349 (2003)
• Obermaier, J.: A continuous function space with a Faber basis. Journal of Approximation Theory 125/2, 303-312 (2003)
• Obermaier, J.: Fourier Transformation Ionen Zyklotron Resonanz Spektrometrie. In: Beiträge zur Biomedizinischen Bildgebung mit einem Seitenblick auf Molecular Imaging, 275- 285, GSF-Bericht 03/04, 2004
• Obermaier, J., Szwarc, R.: Polynomial bases for continuous function spaces, In: International Series of Numerical Mathematics, Trends and Applications in Constructive Approximation, pp. 195 -205, Birkhäuser Verlag, 2005
• Kaffarnik. F, Seidlitz, H.K., Obermaier, J., Sandermann Jr., H., Heller, W.: Environmental and developmental effects on the biosynthesis of UV-B-screening pigments in scots pine (pinus sylvestris L.) needles. Plant, Cell and Environment 29 (8), 1484-1491 (2006)
• Obermaier, J., Szwarc, R.: Nonnegative Linearization for little q-Laguerre polynomials and Faber basis. Journal of Computational and Applied Mathematics 199 (1), 89-94 (2007)
• Lasser, R., Obermaier, J., Rauhut, H.: Generalized hypergroups and orthogonal polynomials. Journal of the Australian Mathematical Society 82, 369-393 (2007)
• Obermaier, J., Szwarc, R.: Orthogonal polynomials of discrete variable and boundedness of Dirichlet kernel. Constructive Approximation 27 (1), 1-13 (2008)
• Lasser, R., Obermaier, J.: A new characterization of ultraspherical polynomials. Proceedings of the American Mathematical Society 136, 2493-2498 (2008)
• Ismail M.E.H., Obermaier, J.: Characterization of continuous and discrete q-ultraspherical polynomials. Canadian Journal of Mathematics 63, 181-191 (2011)
• Obermaier, J.: A modified Fejér and Jackson summability method with respect to orthogonal polynomials. Journal of Approximation Theory 163,554-567 (2011)
• Lasser, R. Obermaier, J.: Strongly invariant means on commutative hypergroups. Colloquium Mathematicum 129, 119-131 (2012)
• Lasser, R. Obermaier, J., Wagner, J.: On the spectrum of tridiagonal operators and the support of orthogonalization measures. Archiv der Mathematik 100, 289-299 (2013)

back to homepage ICB

Imprint & Disclaimer