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Johannes Jahn is a retired „Universitätsprofessor“ formerly working at the Department of Mathematics of the University of Erlangen-Nürnberg (Germany). His research interests are theory and numerical methods in nonlinear optimization, vector optimization and set optimization.

He is the editor of the Springer series Vector Optimization
and a member of the editorial board of the journals

  • Journal of Optimization Theory and Applications
  • Computational Optimization and Applications
  • Minimax Theory and its Applications
  • Journal of Nonlinear and Variational Analysis
  • Ilirias Journal of Mathematics

Selected publications are

(a) books:

  • Vector Optimization – Theory, Applications, and Extensions (Springer, Berlin, 2004, 2011, 481 pages).
  • Introduction to the Theory of Nonlinear Optimization (Springer, Berlin, 1994, 1996, 2007, 292 pages; Springer, Cham, 2020, 323 pages).
    This fourth edition is now available (link). The ebook version uses a colour design whereas in the hardcover version colours are converted into greyscales. Previews of the ebook are given here: Preview 1 and Preview 2.

(b) recent research papers:

  • (with T.X.D. Ha) “Characterizations of strictly convex sets by the uniqueness of support points”, Optimization 68 (2019) 1321–1335.
  • “A derivative-free rooted tree method in nonconvex set optimization”, Pure and Applied Functional Analysis 3 (2018) 603–623.
  • (with M. Knossalla) “Lagrange theory of discrete-continuous nonlinear optimization”, Journal of Nonlinear and Variational Analysis 2 (2018) 317–342.
  • “Karush-Kuhn-Tucker conditions in set optimization, Journal of Optimization Theory and Applications 172 (2017) 707–725.
  • (with T.X.D. Ha) “Properties of Bishop-Phelps cones, Journal of Nonlinear and Convex Analysis 172 (2017) 415–429.

(c) He is involved in two patents.