| Direct and converse results for operators of Baskakov-Durrmeyer type M Heilmann Approximation theory and its Applications 5, 105-127, 1989 | 155 | 1989 |
| Kantorovich Operators of Order k H Gonska, M Heilmann, I Raşa Numerical functional analysis and optimization 32 (7), 717-738, 2011 | 58 | 2011 |
| Erhöhung der Konvergenzgeschwindigkeit bei der Approximation von Funktionen mit Hilfe von Linearkombinationen spezieller positiver linearer Operatoren M Heilmann Habilitationschrift Universität Dortmund, 1992 | 40 | 1992 |
| The complete asymptotic expansion for Bernstein–Durrmeyer operators with Jacobi weights U Abel, M Heilmann Mediterranean Journal of Mathematics 1, 487-499, 2004 | 36 | 2004 |
| Commutativity, direct and strong converse results for Phillips operators M Heilmann, G Tachev East J. Approx 17 (3), 299-317, 2011 | 34 | 2011 |
| Lp-saturation of some modified Bernstein operators M Heilmann Journal of Approximation Theory 54 (3), 260-273, 1988 | 33 | 1988 |
| On simultaneous approximation by the method of Baskakov-Durrmeyer operators M Heilmann, MW Müller Numerical functional analysis and optimization 10 (1-2), 127-138, 1989 | 32 | 1989 |
| Approximation auf [0, oo) durch das Verfahren der Operatoren vom Baskakov-Durrmeyer Typ M Heilmann M. Heilmann, 1987 | 28 | 1987 |
| Direct and converse results on weighted simultaneous approximation by the method of operators of Baskakov-Durrmeyer type M Heilmann, MW Müller Results in Mathematics 16, 228-242, 1989 | 24 | 1989 |
| A nice representation for a link between Baskakov-and Szász–Mirakjan–Durrmeyer operators and their Kantorovich variants M Heilmann, I Raşa Results in Mathematics 74, 1-12, 2019 | 22 | 2019 |
| Further Results for kth order Kantorovich Modification of Linking Baskakov Type Operators K Baumann, M Heilmann, I Raşa Results in Mathematics 69, 297-315, 2016 | 18 | 2016 |
| On the composition and decomposition of positive linear operators III: A non-trivial decomposition of the Bernstein operator H Gonska, M Heilmann, A Lupaş, I Raşa arXiv preprint arXiv:1204.2723, 2012 | 18 | 2012 |
| k-th order Kantorovich type modification of the operators Unρ. M Heilmann, I Raşa Journal of Applied Functional Analysis 9, 2014 | 17 | 2014 |
| Linear combinations of genuine Szasz–Mirakjan–Durrmeyer operators M Heilmann, G Tachev Advances in Applied Mathematics and Approximation Theory: Contributions from …, 2013 | 16 | 2013 |
| kth Order Kantorovich Modification of Linking Baskakov-Type Operators M Heilmann, I Raşa Mathematical Analysis and its Applications: Roorkee, India, December 2014 …, 2015 | 14 | 2015 |
| Asymptotic behaviour of differentiated Bernstein polynomials revisited H Gonska, M Heilmann, I Rasa Gen. Math 18 (1), 45-53, 2010 | 14 | 2010 |
| Eigenstructure and iterates for uniquely ergodic Kantorovich modifications of operators M Heilmann, I Raşa Positivity 21, 897-910, 2017 | 13 | 2017 |
| Eigenfunctions of Durrmeyer-type modifications of Meyer–König and Zeller operators M Heilmann Journal of Approximation Theory 125 (1), 63-73, 2003 | 12 | 2003 |
| Direct and converse results on simultaneous approximation by the method of Bernstein-Durrmeyer operators M Heilmann, MW Müller Algorithms for Approximation II, 107-116, 1990 | 12 | 1990 |
| Equivalence of a weighted modulus of smoothness and a modified weighted K-functional M Heilmann, MW Müller IBM Deutschland GmbH, Heidelberg Scientific Center, 1989 | 12 | 1989 |
Ioan RașaTechnical University of Cluj-NapocaVerified email at math.utcluj.ro
