PD Dr. Josef Obermaier

Phone: +49 89 3187-4486
Fax: +49 89 3187-3029
Building/Room: 56 / 002a

PD Dr. Josef Obermaier

Research interests

    Orthogonal polynomials
    Harmonic analysis
    Density estimators


  • 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)

We use cookies to improve your experience on our Website. We need cookies to continually improve our services, enable certain features, and when we embed third-party services or content, such as the Vimeo video player or Twitter feeds. In such cases, information may also be transferred to third parties. By using our website, you agree to the use of cookies. We use different types of cookies. You can personalize your cookie settings here:

Show detail settings
Please find more information in our privacy statement.

There you may also change your settings later.