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Prof. Dr. rer. nat. habil. Matthias Kriesell


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Veröffentlichungen am Institut für Mathematik seit 1990

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Giribet, Juan; Langer, Matthias; Leben, Leslie; Maestripieri, Alejandra; Martínez Pería, Francisco; Trunk, Carsten;
Spectrum of J-frame operators. - Ilmenau : Technische Universität, Institut für Mathematik, 2017. - 1 Online-Ressource (20 Seiten). . - (Preprint. - M17,01)

A J-frame is a frame F for a Krein space which is compatible with the indefinite inner product in the sense that it induces an indefinite reconstruction formula that resembles those produced by orthonormal bases in H . With every J-frame the so-called J-frame operator is associated, which is a self-adjoint operator in the Krein space H. The J-frame operator plays an essential role in the indefinite reconstruction formula. In this paper we characterize the class of J-frame operators in a Krein space by a 2X2 block operator representation. The J-frame bounds of F are then recovered as the suprema and infima of the numerical ranges of some uniformly positive operators which are build from the entries of the 2X2 block representation. Moreover, this 2X2 block representation is utilized to obtain enclosures for the spectrum of J-frame operators, which finally leads to the construction of a square root. This square root allows a complete description of all J-frames associated with a given J-frame operator.
Bang-Jensen, Jørgen; Bessy, Stéphane; Jackson, Bill; Kriesell, Matthias;
Antistrong digraphs. - In: Journal of combinatorial theory. . - Orlando, Fla. : Academic Press, 1971- ; ZDB-ID: 1469158-9, Bd. 122 (2017), S. 68-90
Proch, Michael; Worthmann, Karl; Schlüchtermann, Jörg;
A negotiation-based algorithm to coordinate supplier development in decentralized supply chains. - In: European journal of operational research : EJOR.. - Amsterdam [u.a.] : Elsevier, ISSN 0377-2217, Bd. 256 (2017), 2, S. 412-429
Mehlhorn, Kurt; Neumann, Adrian; Schmidt, Jens M.;
Certifying 3-edge-connectivity. - In: Algorithmica : an international journal in computer science.. - New York, NY : Springer, ISSN 1432-0541, Bd. 77 (2017), 2, S. 309-335
Behrndt, Jussi; Möws, Roland; Trunk, Carsten;
Eigenvalue estimates for operators with finitely many negative squares. - In: Opuscula mathematica : semiannual.. - Kraków : AGH Univ. of Science and Technology Press, Bd. 36 (2016), 6, S. 717-734
Braun, Philipp; Faulwasser, Timm; Grüne, Lars; Kellett, Christopher M.; Weller, Steven R.; Worthmann, Karl;
Maximal islanding time for microgrids via distributed predictive control. - In: 22nd International Symposium on Mathematical Theory of Networks and Systems : July 12-15, 2016, University of Minnesota, Twin Cities Campus.. - Minneapolis, MN : University Digital Conservancy, ISBN 978-1-5323-1358-5, (2016), S. 652-659
Braun, Philipp; Grüne, Lars; Kellett, Christopher M.; Weller, Steven R.; Worthmann, Karl;
Model predictive control of residential energy systems using energy storage and controllable loads. - In: Progress in industrial mathematics at ECMI 2014. - Cham : Springer International Publishing, (2016), S. 617-623
Harant, Jochen; Fabrici, Igor; Jendrol', Stanislav;
On longest cycles in essentially 4-connected planar graphs. - In: Electronic notes in discrete mathematics. - Amsterdam : Elsevier Science, ISSN 1571-0653, Bd. 55 (2016), S. 143-146
Shkalikov, A. A.; Trunk, Carsten;
On stability of closedness and self-adjointness for 2 x 2 operator matrices. - In: Mathematical notes. - Dordrecht [u.a.] : Springer Science + Business Media B.V, ISSN 1573-8876, Bd. 100 (2016), 5, S. 870-875
Braun, Philipp; Grüne, Lars; Kellett, Christopher M.; Weller, Steven R.; Worthmann, Karl;
A distributed optimization algorithm for the predictive control of smart grids. - In: IEEE transactions on automatic control. - New York, NY : Institute of Electrical and Electronics Engineers, ISSN 1558-2523, Bd. 61 (2016), 12, S. 3898-3911