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Veröffentlichungen am Institut für Mathematik seit 1990

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Winkler, Henrik; Woracek, Harald
Reparametrizations of non trace-normed Hamiltonians. - Ilmenau : Techn. Univ., Inst. für Mathematik, 2011. - Online-Ressource (PDF-Datei: 23 S., 344,7 KB). . - (Preprint. - M11,17)

We consider a Hamiltonian system of the form y0(x) = JH(x)y(x), with a locally integrable and nonnegative 2_2-matrix valued Hamiltonian H(x). In the literature dealing with the operator theory of such equations, it is often required in addition that the Hamiltonian H is trace{normed, i.e. satis_es trH(x) _ 1. However, in many examples this property does not hold. The general idea is that one can reduce to the trace{normed case by applying a suitable change of scale (reparametrization). In this paper we justify this idea and work out the notion of reparametrization in detail.



http://www.db-thueringen.de/servlets/DocumentServlet?id=19504
Knobloch, Jürgen; Rieß, Thorsten; Vielitz, Martin
Nonreversible homoclinic snaking. - In: Dynamical systems : an international journal.. - London : Taylor & Francis, ISSN 1468-9375, Bd. 26 (2011), 3, S. 335-365

http://dx.doi.org/10.1080/14689367.2011.592488
Hildenbrandt, Regina;
A k-server problem with parallel requests and unit distances. - Ilmenau : Techn. Univ., Inst. für Mathematik, 2011. - Online-Ressource (PDF-Datei: 11 S., 207,5 KB). . - (Preprint. - M11,16)

In the paper a k-server problem with parallel requests where several servers can also be located on one point is considered. We show that a HARMONIC_p k-server algorithm is competitive against an adaptive online adversary in case of unit distances.



http://www.db-thueringen.de/servlets/DocumentServlet?id=19013
Harant, Jochen;
A lower bound on independence in terms of degrees. - In: Discrete applied mathematics. - [S.l.] : Elsevier, Bd. 159 (2011), 10, S. 966-970

http://dx.doi.org/10.1016/j.dam.2011.03.003
Kuzhel, Sergii; Trunk, Carsten
On a class of J-self-adjoint operators with empty resolvent set. - In: Journal of mathematical analysis and applications. - Amsterdam [u.a.] : Elsevier, Bd. 379 (2011), 1, S. 272-289

http://dx.doi.org/10.1016/j.jmaa.2010.12.048
Snoo, Henk; deWinkler, Henrik; Wojtylak, Michal
Zeros of nonpositive type of generalized Nevanlinna functions with one negative square. - In: Journal of mathematical analysis and applications. - Amsterdam [u.a.] : Elsevier, Bd. 382 (2011), 1, S. 399-417

http://dx.doi.org/10.1016/j.jmaa.2011.04.060
Kostochka, Alexandr V.; Stiebitz, Michael; Woodall, Douglas R.
Ohba's conjecture for graphs with independence number five. - In: Discrete mathematics. - Amsterdam [u.a.] : Elsevier, Bd. 311 (2011), 12, S. 996-1005

http://dx.doi.org/10.1016/j.disc.2011.02.026
Geletu, Abebe; Hoffmann, Armin; Klöppel, Michael; Li, Pu
Monotony analysis and sparse-grid integration for nonlinear chance constrained process optimization. - In: Engineering optimization. - London : Taylor & Francis, ISSN 1029-0273, Bd. 43 (2011), 10, S. 1019-1041

http://dx.doi.org/10.1080/0305215X.2010.532552
Löwenstein, Christian; Pedersen, Anders Sune; Rautenbach, Dieter; Regen, Friedrich
Independence, odd girth, and average degree. - In: Journal of graph theory. - New York, NY [u.a.] : Wiley, ISSN 1097-0118, Bd. 67 (2011), 2, S. 96-111

http://dx.doi.org/10.1002/jgt.20518
Babovsky, Hans;
Kinetic lattice group models: structure and numerics. - In: AIP conference proceedings. - Melville, NY : Inst, ISSN 15517616, Bd. 1333 (2011), S. 63-68

http://dx.doi.org/10.1063/1.3562626