Prof. Dr. Sven-Ake Wegner

Department of Mathematics

University of Hamburg

Bundesstraße 55

20146 Hamburg

Germany

Email: sven dot wegner at uni-hamburg dot de

Phone: +49 40 2395 25120

Office: 104

ORCID: 0000-0001-8704-3182

Google Scholar Profile

Web of Science

Research Interests

Operator Semigroups and Evolution Equations
Homological Algebra in the context of Functional Analysis
Mathematical Principles of Data Science

Upcoming Events

Links between commutative algebra and representation theory, Imperial College, London (15/04/26)
FNRS Contact Group on Functional Analysis, Liège (21-22/05/26)
Workshop on Categorification in Functional Analysis, Hamburg (01-02/06/26)
International Conference on Topological Methods in Functional Analysis and Measure Theory, Poznań (23-26/06/26)
45. Nordwestdeutsches Funktionalanalyis Kolloquium, Dortmund (27/06/26)
ICRA 22, Institut Fourier, Université Grenoble-Alpes (29/06-03/07/26)

Curriculum Vitae

since 04/2025		Professor of Mathematics, University of Hamburg, Germany
10/2020-03/2025		Research Fellow in Mathematics, University of Hamburg, Germany
07/2020		Habilitation in Mathematics with Birgit Jacob, University of Wuppertal, Germany
07-09/2019		Invited Researcher at IHES, Paris, France
01/2018-09/2020		Senior Lecturer in Mathematics, Teesside University, Middlesbrough, UK
08/2015-07/2016		Assistant Professor, Nazarbayev University, Astana, Kazakhstan
09-10/2014		ERASMUS+ Fellow at the Adam Mickiewicz University, Poznań, Poland
09/2013-03/2014		DAAD Fellow at the Sobolev Institute of Mathematics, Novosibirsk, Russia
10/2010-01/2018		Research Associate with Birgit Jacob (temporarily on leave), University of Wuppertal, Germany
06/2010		PhD in Mathematics with José Bonet, Polytechnic University of Valencia, Spain
04/2007-09/2010		Research Assistant with Helge Glöckner and Klaus D. Bierstedt, University of Paderborn, Germany
03/2007		MSc in Mathematics with Klaus D. Bierstedt, University of Paderborn, Germany

Book(s)

Sven-Ake Wegner (2024)

Mathematische Einführung in Data Science

Springer Spektrum, Berlin, Heidelberg, x+303 pages

Sven-Ake Wegner (2024)

Mathematical Introduction to Data Science

Springer, Berlin, Heidelberg, x+299 pages

More Information: https://mathematicaldatascience.github.io

Preprints

35.		F. Böhnlein, B. Bruske and S.-A. Wegner (2025)
		Condensed mathematics through compactological spaces
		arXiv:2512.14612
34.		S.-A. Wegner (2025)
		A homological approach to (Grothendieck's) completeness problem for regular LB-spaces
		arXiv:2512.13161
33.		J. Kelly, L. Neyt and S.-A. Wegner (2025)
		Bornological LB-spaces and idempotent adjunctions
		arXiv:2511.08528

Journal Publications

32.		J. Dommel and S.-A. Wegner (2026)
		An in-depth look at approximation via deep and narrow neural networks
		Neurocomputing 659, 131769, DOI 10.1016/j.neucom.2025.131769
31.		R. Henrard, S. Kvamme, A.-C. van Roosmalen and S.-A. Wegner (2023)
		The left heart and exact hull of an additive regular category
		Rev. Mat. Iberoam. 39, no. 2, 439-494, DOI 10.4171/RMI/1388
30.		M. Lawson and S.-A. Wegner (2023)
		The category of Silva spaces is not integral
		Homology, Homotopy and Applications 25, no. 1, 367-374, DOI: 10.4310/HHA.2023.v25.n1.a19
29.		C. Budde and S.-A. Wegner (2022)
		A Lumer-Phillips type generation theorem for bi-continuous semigroups
		Zeitschrift für Analysis und ihre Anwendungen 41, no. 1-2, 65-80, DOI: 10.4171/ZAA/1695
28.		S. Hassoun, A. Shah and S.-A. Wegner (2021)
		Examples and non-examples of integral categories and the admissible intersection property
		Cahiers Topologie Géom. Différentielle Catég. 62, no. 3, 329-354
27.		G. Passias and S.-A. Wegner (2021)
		On a counterexample in connection with the Picard-Lindelöf Theorem
		College Math. J. 52, no. 3, 221-223, DOI:10.1080/07468342.2021.1909978
26.		M. Waurick and S.-A. Wegner (2020)
		Dissipative extensions and port-Hamiltonian operators on networks
		J. Diff. Equat. 269, no. 9, 6830-6874, DOI: 10.1016/j.jde.2020.05.014
25.		B. Jacob and S.-A. Wegner (2019)
		Well-posedness of a class of hyperbolic partial differential equations on the semi-axis
		J. Evol. Equat. 19, no. 4, 1111-1147, DOI: 10.1007/s00028-019-00507-7
24.		M. Waurick and S.-A. Wegner (2018)
		Some remarks on the notions of boundary systems and boundary triple(t)s
		Math. Nachr. 291, no. 16, 2489-2497, DOI: 10.1002/mana.201700417
23.		C. Bargetz and S.-A. Wegner (2018)
		Pivot duality of universal interpolation and extrapolation spaces
		J. Math. Anal. Appl. 460, no. 1, 321-331, DOI: 10.1016/j.jmaa.2017.11.042
22.		S.-A. Wegner (2017)
		Boundary triplets for skew-symmetric operators and the generation of strongly continuous semigroups
		Analysis Mathematica 43, no. 4, 657-686, DOI: 10.1007/s10476-017-0509-6
21.		S.-A. Wegner (2017)
		The heart of the Banach spaces
		J. Pure Appl. Algebra, 221, no. 11, 2880-2909, DOI: 10.1016/j.jpaa.2017.02.006
20.		B. Farkas and S.-A. Wegner (2016)
		Variations on Barbălat's Lemma
		Amer. Math. Monthly 128, no. 8, 825-830, DOI: 10.4169/amer.math.monthly.123.8.825
19.		S.-A. Wegner (2016)
		The growth bound for strongly continuous semigroups on Fréchet spaces
		Proc. Edinb. Math. Soc. 59, no. 3, 801-810, DOI: 10.1017/S0013091515000310
18.		A. Golińska and S.-A. Wegner (2016)
		Non-power bounded generators of strongly continuous semigroups
		J. Math. Anal. Appl. 436, no. 1, 429-438. DOI: 10.1016/j.jmaa.2015.12.015
17.		B. Jacob and S.-A. Wegner (2015)
		Asymptotics of evolution equations beyond Banach spaces
		Semigroup Forum 91, no. 2, 347-377, DOI: 10.1007/s00233-014-9659-z
16.		B. Jacob, S.-A. Wegner and J. Wintermayr (2015)
		Desch-Schappacher perturbation of one-parameter semigroups on locally convex spaces
		Math. Nachr. 288, no. 8-9, 925-934, DOI: 10.1002/mana.201400116
15.		L. Minder, T. Sauerwald and S.-A. Wegner (2015)
		Asymptotic bounds on the equilateral dimension of hypercubes
		Graphs Combin. 31, no. 5, 1629-1636. DOI: 10.1007/s00373-014-1473-6
14.		Ya. Kopylov and S.-A. Wegner (2014)
		Exact couples in semiabelian categories revisited
		J. Algebra 414, 264-270. DOI: 10.1016/j.jalgebra.2014.04.030
13.		S.-A. Wegner (2014)
		Universal extrapolation spaces for C₀-semigroups
		Ann. Univ. Ferrara 60, no. 2, 447-463, DOI: 10.1007/s11565-013-0189-5
12.		Ya. Kopylov and S.-A. Wegner (2012)
		On the notion of a semi-abelian category in the sense of Palamodov
		Appl. Categor. Struct. 20, no. 5, 531-541. DOI: 10.1007/s10485-011-9249-0
11.		S.-A. Wegner (2012)
		PLB-spaces of holomorphic functions with logarithmic growth conditions
		Arch. Math. (Basel) 98, no. 2, 163-172, DOI: 10.1007/s00013-011-0339-x
10.		S.-A. Wegner (2011)
		Projective limits of weighted LB-spaces of holomorphic functions
		J. Math. Anal. Appl. 383, no. 2, 409-422. DOI: 10.1016/j.jmaa.2011.05.033
9.		D. Sieg and S.-A. Wegner (2011)
		Maximal exact structures on additive categories
		Math. Nachr. 284, no. 16, 2093-2100, DOI: 10.1002/mana.200910154
8.		J. Bonet and S.-A. Wegner (2011)
		Bornological projective limits of inductive limits of normed spaces
		Funct. Approx. Comment. Math. 44, no. 2, 227-242, DOI: 10.7169/facm/1308749126
7.		S.-A. Wegner (2011)
		Weighted PLB-spaces of continuous functions arising as tensor products of a Fréchet and a DF-space
		Rev. R. Acad. Cien. Serie A. Mat. 105, no. 1, 85-96, DOI: 10.1007/s13398-011-0001-2
6b.		S. Michaelis de Vasconcellos, S. Stufler, S.-A. Wegner, P. Ester, A. Zrenner and M. Bichler (2006)
		Quantum interferences of a single quantum dot in the case of detuning (presented on the QD2006)
		phys. stat. sol. (c) 3, No. 11, 3730-3733, DOI: 10.1002/pssc.200671585
6a.		S. Michaelis de Vasconcellos, S. Stufler, S.-A. Wegner, P. Ester, A. Zrenner and M. Bichler (2006)
		Quantum interferences of a single quantum dot in the case of detuning (journal version)
		Phys. Rev. B 74, 081304(R), DOI: 10.1103/PhysRevB.74.081304

Mathematics Education

5.		C. von Renesse, S.-A. Wegner (2023)
		Two examples of ungrading in higher education in the United States and Germany
		PRIMUS 33, no. 9, 1035-1054, DOI 10.1080/10511970.2023.2229819
4.		T. Pawlaschyk and S.-A. Wegner (2020)
		Engaging students in conjecturing through homework in Real Analysis and Differential Equations
		Int. J. Math. Educ. Sci. Technol. 51, no. 3, 439-450, DOI:10.1080/0020739X.2019.1656832
3.		S. Beumann and S.-A. Wegner (2018)
		An outlook on self-assessment of homework assignments in higher mathematics education
		Int. J. STEM Edu. 5, no. 55, 1-7, DOI: 10.1186/s40594-018-0146-z
2.		K. Rolka and S.-A. Wegner (2018)
		An open day in the metric space
		Teaching Mathematics and its Applications 37, no. 3, 155-162, DOI: 10.1093/teamat/hrw025
1.		S.-A. Wegner (2014)
		A workshop for high school students on naive set theory
		Eur. J. Sci. Math. Edu. 2, no. 4, 193-201

Teaching

Mathematical Foundations of Artificial Intelligence (University of Hamburg, Summer 2026)
Mathematical Machine Learning (University of Hamburg, Summer 2026)
Topics in Algebra (University of Hamburg, Winter 2025)
Mathematical Machine Learning (University of Hamburg, Summer 2025)
Mathematics IV (University of Hamburg, Summer 2025)
Mathematics III (University of Hamburg, Winter 2024)
Mathematics II (University of Hamburg, Summer 2024)
Software Course (University of Hamburg, Summer 2024)
Mathematics I (University of Hamburg, Winter 2023)
Functional Analysis (University of Hamburg, Summer 2023)
Software Course (University of Hamburg, Summer 2023)
Mathematical Introduction to Data Science (University of Hamburg, Winter 2022)
Software Course (University of Hamburg, Summer 2022)
Mathematics III (University of Hamburg, Winter 2021)
Software Course (University of Hamburg, Summer 2021)
Nonlinear Functional Analysis (University of Wuppertal, Summer 2021)
Mathematical Data Science (Teesside University, Fall 2020)
Analysis I (Teesside University, Fall 2020)
Mathematical Modeling (Teesside University, Spring 2020)
Analysis II (Teesside University, Spring 2020)
Data Analysis (Teesside University, Fall 2019)
Vector Analysis and Measure Theory (Teesside University, Fall 2019)
Analysis I (Teesside University, Fall 2019)
Differential Equations and Fourier Analysis (Teesside University, Spring 2019)
Analysis II (Teesside University, Spring 2019)
Vector Analysis and Measure Theory (Teesside University, Fall 2018)
Analysis I (Teesside University, Fall 2018)
Engineering Mathematics (Teesside University, Fall 2018)
Engineering Mathematics & Calculus (Teesside University, Spring 2018)
Calculus (Teesside University, Spring 2018)
Ordinary Differential Equations (University of Wuppertal, Winter 2016)
Discrete Mathematics (Nazarbayev University, Astana, Spring 2016)
Real Analysis II (Nazarbayev University, Astana, Spring 2016)
Real Analysis I (Nazarbayev University, Astana, Fall 2015)
Calculus I (Nazarbayev University, Astana, Fall 2015)
Introduction to Functional Analysis (University of Wuppertal, Summer 2012)
Operator Semigroups for Numerical Analysis (University of Wuppertal, Winter 2011)
Splitting Theory for PLS-spaces (University of Wuppertal, Summer 2011)

Blockcourses

Introduction to Functional Analysis (Nazarbayev University, Astana, Spring 2016)
One Parameter Semigroups on Locally Convex Spaces (Adam Mickiewicz University, Poznań, Fall 2014)
Distribution Theory and Partial Differential Equations (University of Wuppertal, Summer 2012)

Seminars

Selected Topics in Analysis (University of Hamburg, Winter 2025)
Selected Topics in Mathematical Data Science (University of Hamburg, Winter 2023)
Analysis of Teaching Material for Secondary School (University of Hamburg, Summer 2023)
Selected Topics in Analysis (University of Wuppertal, Winter 2014)
Semigroups on Locally Convex Spaces (University of Wuppertal, Summer 2012)