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Publikationen
- H. Gonska, M. Heilmann, A. Lupaş ,
I. Raşa:
On the composition and decomposition of positive linear operators III: A non-trivial decomposition of the Bernstein operator.
Technical report . - M. Heilmann, M. Wagner:
Genuine Bernstein-Durrmeyer operators and quasi-interpolants.
eingereicht . - M. Heilmann, M. Wagner:
Strong converse results for Baskakov-Durrmeyer operators.
eingereicht . - H. Gonska, M. Heilmann, I. Raşa:
Kantorovitch operators of order k
Numerical Functional Analysis and Optimization, 32, No. 7, 717-738 (2011). - M. Schäfer, W. Berchtold, M. Heilmann, S. Zmudzinski, M. Steinebach, S. Katzenbeisser:
Collosion secure fingerprint watermarking for real world applications.
In: Proceedinggs of GI-Sicherheit 2010, Oktober 2010. - M. Heilmann, M. Wagner:
Strong converse results for Bernstein-Durrmeyer operators and their quasi-interpolants.
General Mathematics, 18, No. 1, 45-53 (2010). - H. Gonska, M. Heilmann, I. Raşa:
Asymptotic behaviour of differentiated Bernstein polynomials revisited.
General Mathematics, 18, No. 1, 55-70 (2010). - H. Gonska, M. Heilmann, I. Raşa:
Convergence of iterates of genuine and ultraspherical Durrmeyer operators to the limiting semigroup: Cē-estimates.
Journal Approx. Theory, 160, 243-255 (2009). - U. Abel, M. Heilmann:
The complete asymptotic expansion for Bernstein-Durrmeyer operators with Jacobi weights.
Mediterranean Journal of Mathematics, 487-499 (2004). -
M. Heilmann:
Rodriguez-type representation for the eigenfunctions of Durrmeyer-type operators.
Result. Math.,44, 97-105 (2003). - M. Heilmann:
Eigenfunctions od Durrmeyer-type modifications of Meyer-König and Zeller operators.
Journal Approx. Theory, 125/1, 63-73 (2003). - M. Heilmann:
Commutativity of Durrmeyer-type modifications of Meyer-König and Zeller and Baskakov-operators.
B. Bojanov (ed.) et al., Constructive Theory of Functions, Proceedings of the international conference, - M. Heilmann:
Saturation of linear combinations of Baskakov-Durrmeyer-type operators
Appl. Anal., 59, No. 1-4, 93-107 (1995). - M. Heilmann:
Explicit Voronovskaja-type results for linear combinations of BDT-operators.
Approximation Theory Appl., 11, No. 1, 54-61 (1995). - M. Heilmann:
Rate of approximation of weighted derivatives by linear combinations of SMD-operators.
D. Braess (ed.) et al.,Numerical methods in approximation theory. Vol. 9: Proceedings of the conference held in - M. Heilmann, M. W. Müller:
Equivalence of a weighted modulus of smoothness and a modified weighted K-functional,
P. Nevai, A. Pinkus (eds.), Progress in approximation theory, Academic Press, - M. Heilmann, M. W. Müller:
Direct and converse results on simultaneous approximation by the method of Bernstein-Durrmeyer operators.
Algorithms for approximation II, Proc. 2nd Int. Conf., Shrivenham/UK 1988, 107-116 (1990). - M. Heilmann, M. W. Müller:
Weighted simultaneous Lp-approximation by the method of Baskakov-Durrmeyer operators.
Approximation Theory VI, Proc. 6th Int. Symp., College Station/TX ( - M. Heilmann, M. W. Müller:
Direct and converse results on weighted simultaneous approximation by the method of operators of Baskakov-Durrmeyer type.
Result. Math. 16 No.3/4, 228-242 (1989). - M. Heilmann:
On simultaneous approximation by optimal algebraic polynomials.
Result. Math. 16, No.1/2, 77-81 (1989). - M. Heilmann:
Direct and converse results for operators of Baskakov-Durrmeyer type.
Approximation Theory Appl. 5, No.1, 105-127 (1989). - M. Heilmann, M. W. Müller:
On simultaneous approximation by the method of Baskakov-Durrmeyer operators.
Numer. Funct. Anal. Optimization 10, No.1/2, 127-138 (1989). - M. Heilmann:
Commutativity of operators from Baskakov-Durrmeyer type.
Constructive theory of functions, Proc. Int. Conf., Varna/Bulg. 1987, 197-206 (1988). - M. Heilmann:
Lp-saturation of some modified Bernstein operators.
J. Approximation Theory 54, No.3, 160-273 (1988).