Margareta Heilmann

62.

Abel, Ulrich; Acu, Ana Maria; Heilmann, Margareta; Raşa, Ioan
Asymptotic expansions for variants of the gamma and Post–Widder operators preserving 1 and xj
Mathematical Methods in the Applied Sciences, 47 (18) :13718-13733
2024

DOI: https://doi.org/10.1002/mma.10217

61.

Abel, Ulrich; Acu, Ana Maria; Heilmann, Margareta; Raşa, Ioan
Asymptotic properties for a general class of Szasz-Mirakjan-Durrmeyer operators
2024

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60.

Abel, Ulrich; Acu, Ana Maria; Heilmann, Margareta; Raşa, Ioan
Commutativity and spectral properties for a general class of Szasz-Mirakjan-Durrmeyer operators
Advances in Operator Theory, 10 (1) :14
2024

DOI: 10.1007/s43036-024-00403-z

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59.

Abel, Ulrich; Acu, Ana Maria; Heilmann, Margareta; Raşa, Ioan
On some Cauchy problems and positive linear operators
Mediterranean Journal of Mathematics, accepted
2024

58.

Acu, Ana-Maria; Heilmann, Margareta; Raş, Ioan; Steopoaie, Ancuta Emilia
Voronovskaja type results for the Aldaz-Kounchev-Render versions of generalized Baskakov operators
Applicable Analysis and Discrete Mathematics :1-16
2024

DOI: 10.2298/AADM230725016A

57.

Abel, Ulrich; Acu, Ana Maria; Heilmann, Margareta; Raşa, Ioan
Voronovskaja formula for Aldaz–Kounchev–Render operators: uniform convergence
Analysis and Mathematical Physics, 14 (1)
Dezember 2023
ISSN: 1664-235X

DOI: 10.1007/s13324-023-00861-3

56.

Acu, Ana-Maria; Heilmann, Margareta; Raşa, Ioan; Seserman, Andra
Convergence of linking Durrmeyer type modifications of generalized Baskakov operators
Bulletin of the Malaysian Math. Sciences Society, 46 (3)
2023

DOI: 10.1007/s40840-023-01503-4

55.

Abel, Ulrich; Acu, Ana Maria; Heilmann, Margareta; Raşa, Ioan
Genuine Bernstein–Durrmeyer type operators preserving 1 and $x^j$
Annals of Functional Analysis, 15 (1)
Oktober 2023
Herausgeber: Springer Science and Business Media LLC
ISSN: 2008-8752

DOI: 10.1007/s43034-023-00305-w

54.

Acu, Ana-Maria; Heilmann, Margareta; Raşa, Ioan; Seserman, Andra
Poisson approximation to the binomial distribution: extensions to the convergence of positive operators
Rev. Real Acad. Cienc. Exactas Fis. Nat. Ser. A-Mat., 117
2023

DOI: 0.1007/s13398-023-01497-5

53.

Abel, Ulrich; Acu, Ana Maria; Heilmann, Margareta; Raşa, Ioan
Positive linear operators preserving certain monomials on [0, ∞)
Dolomites Research Notes on Approximation, 16 :1-9
2023
ISSN: 2035-6803

DOI: 10.14658/PUPJ-DRNA-2023-3-2

52.

Acu, Ana-Maria; Heilmann, Margareta; Raşa, Ioan
Some results for the inverse of a Bernstein–Schnabl type operator
Analysis and Mathematical Physics, 13 (1)
2023

DOI: 10.1007/s13324-022-00777-4

51.

Acu, Ana-Maria; Dancs, Madalina; Heilmann, Margareta; Raşa, Ioan; Paşca, Vlad
A Bernstein-Schnabl type operator
Applicable Analysis and Discrete Mathematics, 16(2) :495-507
2022

DOI: 10.2298/AADM210714011A

50.

Acu, Ana-Maria; Dancs, Madalina; Heilmann, Margareta; Raşa, Ioan; Paşca, Vlad
Voronovskaya type results for special sequences of operators
RACSAM, 116,19
2022

DOI: 10.1007/s13398-021-01157-6

49.

Acu, Ana-Maria; Heilmann, Margareta; Raşa, Ioan
Eigenstructure and iterates for uniquely ergodic Kantorovich modifications of operators II
Positivity, 25 :1585-1599
2021

DOI: 10.1007/s11117-021-00832-7

48.

Acu, Ana-Maria; Heilmann, Margareta; Raşa, Ioan
Iterates of convolution-type operators
Positivity, 25 :495-506
2021

DOI: 10.1007/s11117-020-00773-7

47.

Acu, Ana-Maria; Gonska, Heiner; Heilmann, Margareta
Remarks on a Bernstein-type operator of Aldaz, Kounchev and Render
2021

DOI: 10.48550/arXiv.2108.07889

46.

Abel, Ulrich; Heilmann, Margareta; Kushnirevych, Vitaliy
Convergence of linking Baskakov-type operators
Periodica Mathematica Hungarica, 80 :280-288
2020

DOI: 10.1007/s10998-020-00337-y

45.

Heilmann, Margareta; Nasaireh, Fadel; Raşa, Ioan
Discrete operators associated with linking operators
Analysis and Mathematical Physics, 10 (72)
2020

DOI: 10.1007/s13324-020-00423-x

44.

Acu, Ana Maria; Heilmann, Margareta; Raşa, Ioan
Linking Baskakov type operators
CONSTRUCTIVE THEORY OF FUNCTIONS, Sozopol 2019, Seite 23-38
Herausgeber: Prof. Marin Drinov Academic Publishing House
2020

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43.

Heilmann, Margareta; Raşa, Ioan
Note on a proof for the representation of the kth order Kantorovich modification of linking Baskakov type operators
In Deo, Naokant and Gupta, Vijay and Acu, Ana Maria and Agrawal, P. N., Editor, Mathematical Analysis I: Approximation Theory , Seite 89–93
In Deo, Naokant and Gupta, Vijay and Acu, Ana Maria and Agrawal, P. N., Editor
Herausgeber: Springer Singapore
2020

DOI: 10.1007/978-981-15-1153-0_8

42.

Berdysheva, Elena; Heilmann, Margareta; Hennings, Katharina
Pointwise convergence of the Bernstein-Durrmeyer operator with respect to a collection of measures
Journal of Approximation Theory, 251, Article 105339
2020

DOI: 10.1016/j.jat.2019.105339

41.

Acu, Ana-Maria; Heilmann, Margareta; Raşa, Ioan
Strong converse results for linking operators and convex functions
Journal of Function Spaces, 2020 (1) :4049167
2020

DOI: 10.1155/2020/4049167

40.

Heilmann, Margareta; Raşa, Ioan
A nice representation for a link between Baskakov-and Szász–Mirakjan–Durrmeyer operators and their kantorovich variants
Results in Mathematics, 74 (1) :9
2018

DOI: 10.1007/s00025-018-0932-4

39.

Heilmann, Margareta; Nasaireh, Fadel; Raşa, Ioan
Beta and related operators revisited
Constructive Theory of Functions, Proceedings, Seite 175-185
CTF 2016
Sozopol, Bulgaria
June 11-17, 2016
In K. Ivanov, G. Nikolov, R. Uluchev, Editor
Herausgeber: Prof. Marin Drinov Academic Publishing House
2018

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38.

Heilmann, Margareta; Raşa, Ioan
C0-semigroups associated with uniquely ergodic Kantorovich modifications of operators
Positivity, 22 :829-835
2018

DOI: 10.1007/s11117-017-0547-0