Contact

School of Science, Engineering & Design
Teesside University, Middlesbrough
TS1 3BX, United Kingdom

E-mail: s dot wegner at tees dot ac dot uk
Phone: +44(0)1642/738200
Office: IC.0.08

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Research Interests

  • Operator Semigroups, Extrapolation Spaces, Boundary Value Problems, Infinite Dimensional Systems Theory
  • Non-Abelian Category Theory, Homological Algebra in the context of Functional Analysis

Upcoming Events

Recent Conferences

  • FNRS Functional Analysis Meeting, Liège, Belgium (09-10/05/2019)
  • Analysis of and Analysis on Networks, Middlesbrough, UK (22/03/2019)
  • Joint Mathematics Meeting (JMM), Baltimore, USA (16-19/01/2019)
  • 18th International Conference on Representations of Algebras, Prague, Czech Republic (17/08/2018)
  • Research Stay at University of Cambridge, Cambridge, UK (30/05-06/06/2018)
  • North British Functional Analysis Seminar, Newcastle-upon-Tyne, UK (28-29/05/2018)
  • 50th Anniversary Meeting of the North British Functional Analysis Seminar, Edinburgh, UK (12-14/04/2018)
  • Control theory of infinite-dimensional systems, Hagen, Germany (10-12/01/2018)

Recent Talks

  • Port-Hamiltonian differential equations on infinite networks, Applied Analysis Seminar, University of Strathclyde, Glasgow, UK (22/10/2019)
  • The hearts of Banach and LB-spaces, Functional Analysis Seminar, University of Trier, Germany (12/07/2019)
  • Port-Hamiltonian systems on infinite graphs, FNRS Functional Analysis Meeting, Liège, Belgium (09-10/05/2019)
  • Dissipative Extentions and port-Hamiltonian systems on infinite networks, Functional Analysis Seminar, Wuppertal, Germany (07/05/2019)
  • Port-Hamiltonian systems on graphs, Analysis of and Analysis on Networks, Middlesbrough, UK (22/03/2019)
  • The heart of the LB-spaces, Pure Maths Seminar, University of East Anglia, Norwich, UK (04/03/2019)
  • Is functional analysis a special case of tilting theory?, Algebra Seminar, University of Leeds, Leeds, UK (26/02/2019)
  • The heart of the Banach spaces, ICRA 2018, Prague, Czech Republic (13-17/08/2018)
  • The heart of the Banach spaces, 50th Anniversary Meeting of the NBFAS, Edinburgh, UK (12-14/04/2018)
  • Well-posedness of port-Hamiltonian PDEs on a semi axis, Nazarbayev University, Astana, Kazakhstan (06/04/2018)

Curriculum Vitae

  •           07-09/2019    Invited Researcher, Institut des Hautes Études Scientifiques, Bures-sur-Yvette, France
  •                 09/2018    Promotion to Senior Lecturer
  •       since 01/2018    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, host: Paweł Domański
  • 09/2013-03/2014    DAAD Fellow at the Sobolev Institute of Mathematics, Novosibirsk, Russia
  • 10/2010-01/2018    Research Associate with Birgit Jacob, University of Wuppertal, Germany (temporarily on leave)
  •                 06/2010    PhD in Mathematics, Polytechnic University of Valencia, Spain, supervisor: José Bonet Solves
  • 04/2007-09/2010    Research Assistant of Klaus D. Bierstedt and Helge Glöckner, University of Paderborn, Germany
  •                 03/2007    MSc in Mathematics, University of Paderborn, Germany, supervisor: Klaus D. Bierstedt

Journal Publications

  1. B. Jacob and S.-A. Wegner (2019)
    Well-posedness of a class of hyperbolic partial differential equations on the semi-axis
    J. Evol. Equ. 19, no. 4, 1111–1147, DOI: 10.1007/s00028-019-00507-7
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
    phys. stat. sol. (c) 3, No. 11, 3730-3733, DOI: 10.1002/pssc.200671585
  21. 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
    Phys. Rev. B 74, 081304(R), DOI: 10.1103/PhysRevB.74.081304

Mathematics Education

  1. T. Pawlaschyk and S.-A. Wegner (2019)
    Engaging students in conjecturing through homework in Real Analysis and Differential Equations
    Int. J. Math. Educ. Sci. Technol., 12p., to appear, DOI:10.1080/0020739X.2019.1656832
  2. S. Beumann and S.-A. Wegner (2018)
    An outlook on self-assessment of homework assignments in higher mathematics education
    International Journal of STEM Education 5, no. 55, 1–7, DOI: 10.1186/s40594-018-0146-z
  3. 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
  4. S.-A. Wegner (2014)
    A workshop for high school students on naive set theory
    Eur. J. Sci. Math. Edu. 2, no. 4, 193-201

Preprints

  1. M. Waurick and S.-A. Wegner (2019)
    Dissipative extensions and port-Hamiltonian operators on networks
    arXiv: 1905.01117, 34 pages
  2. G. Passias and S.-A. Wegner (2018)
    A counterexample in connection with the Picard-Lindelöf Theorem
    arXiv: 1801.08134, 2 pages

Teaching

  • 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)

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Impressum: Dr Sven-Ake Wegner, School of Science, Engineering & Design, Teesside University, Middlesbrough TS1 3BX, UK.