Tretter, Christiane

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Brown, B. Malcolm; Langer, Heinz; Tretter, Christiane (2019). Compressed resolvents and reduction of spectral problems on star graphs. Complex analysis and operator theory, 13(1), pp. 291-320. Birkhäuser 10.1007/s11785-018-0793-6


Freitas, Pedro; Siegl, Petr; Tretter, Christiane (2018). The damped wave equation with unbounded damping. Journal of differential equations, 264(12), pp. 7023-7054. Elsevier 10.1016/j.jde.2018.02.010

Ibrogimov, Orif; Tretter, Christiane (2018). On the spectrum of an operator in truncated Fock space. In: Alpay, Daniel; Kirstein, Bernd (eds.) Indefinite inner product spaces, Schur analysis, and differential equations. Operator Theory: Advances and Applications: Vol. 263 (pp. 321-334). Cham: Birkhäuser/Springer

Rasulov, Tulkin; Tretter, Christiane (2018). Spectral inclusion for unbounded diagonally dominant n × n operator matrices. Rocky Mountain journal of mathematics, 48(1), pp. 279-324. Rocky Mountain Mathematics Consortium 10.1216/RMJ-2018-48-1-279

Jacob, Birgit; Tretter, Christiane; Trunk, Carsten; Vogt, Hendrik (2018). Systems with strong damping and their spectra. Mathematical methods in the applied sciences, 41(16), pp. 6546-6573. Wiley 10.1002/mma.5166

Stefani, Frank; Tretter, Christiane (2018). On a spectral problem in magnetohydrodynamics and its relevance for the geodynamo. GAMM-Mitteilungen, 41(3), e201800012. Wiley 10.1002/gamm.201800012


Bögli, Sabine; Siegl, Petr; Tretter, Christiane (2017). Approximations of spectra of Schrödinger operators with complex potentials on ℝd. Communications in partial differential equations, 42(7), pp. 1001-1041. Taylor & Francis 10.1080/03605302.2017.1330342

Ibrogimov, Orif; Tretter, Christiane (2017). Essential spectrum of elliptic systems of pseudo-differential operators on L² (RN) ⊕ L²(RN). Journal of pseudo-differential operators and applications, 8(2), pp. 147-166. Springer 10.1007/s11868-017-0198-8

Engström, Christian; Langer, Heinz; Tretter, Christiane (2017). Rational eigenvalue problems and applications to photonic crystals. Journal of mathematical analysis and applications, 445(1), pp. 240-279. Elsevier 10.1016/j.jmaa.2016.07.048


Adamyan, V.; Langer, Heinz; Tretter, Christiane; Winklmeier, Monika (2016). Dirac-Krein systems on star graphs. Integral equations and operator theory, 86(1), pp. 121-150. Birkhäuser 10.1007/s00020-016-2311-4

Ibrogimov, Orif; Siegl, Petr; Tretter, Christiane (2016). Analysis of the essential spectrum of singular matrix differential operators. Journal of differential equations, 260(4), pp. 3881-3926. Elsevier 10.1016/j.jde.2015.10.050

Cuenin, Jean-Claude; Tretter, Christiane (2016). Non-symmetric perturbations of self-adjoint operators. Journal of mathematical analysis and applications, 441(1), pp. 235-258. Elsevier 10.1016/j.jmaa.2016.03.070

Ball, Joseph A.; Dym, Harry; Kaashoek, Marinus A.; Langer, Heinz; Tretter, Christiane (eds.) (2016). Operator Theory: Advances and Applications. Birkhäuser/Springer


Tretter, Christiane; Wyss, Christian (2014). Dichotomous Hamiltonians with unbounded entries and solutions of Riccati equations. Journal of evolution equations, 14(1), pp. 121-153. Birkhäuser 10.1007/s00028-013-0210-6

Radl, Agnes; Tretter, Christiane; Wagenhofer, Markus (2014). The block numerical range of analytic operator functions. Operators and Matrices, 8(4), pp. 901-934. Element 10.7153/oam-08-51

Bögli, Sabine; Brown, B. Malcolm; Marletta, Marco; Tretter, Christiane; Wagenhofer, Markus (2014). Guaranteed resonance enclosures and exclosures for atoms and molecules. Proceedings of the Royal Socociety London. Series A Mathematical and Physical Sciences, 470(2171), 20140488, 17. 10.1098/rspa.2014.0488

Cuenin, Jean-Claude; Laptev, Ari; Tretter, Christiane (2014). Eigenvalue estimates for non-selfadjoint Dirac operators on the real line. Annales Henri Poincaré, 15(4), pp. 707-736. Springer 10.1007/s00023-013-0259-3


Pivovarchik, Vyacheslav; Rozhenko, Natalia; Tretter, Christiane (2013). Dirichlet-Neumann inverse spectral problem for a star graph of Stieltjes strings. Linear algebra and its applications, 439(8), pp. 2263-2292. Elsevier 10.1016/j.laa.2013.07.003

Marletta, Marco; Tretter, Christiane (2013). Spectral bounds and basis results for non-self-adjoint pencils, with an application to Hagen-Poiseuille flow. Journal of functional analysis, 264(9), pp. 2136-2176. Elsevier 10.1016/j.jfa.2013.02.008

Ibrogimov, Orif; Tretter, Christiane; Langer, Heinz; Langer, Matthias (2013). Essential spectrum of systems of singular differential equations. Acta Scientiarum Mathematicarum, 79(3-4), pp. 423-465. Bolyai Institute, University of Szeged


Tretter, Christiane (2012). Analysis I. Basel: Birkhäuser

Ball, J.A.; Dym, H.; Kaashoek, M.A.; Langer, H.; Tretter, C. (eds.) (2012). Operator Theory: Advances and Applications. Birkhäuser

Tretter, Christiane (ed.) (2012). Integral Equations and Operator Theory. Birkhäuser


Tretter, Christiane (2010). The quadratic numerical range of an analytic operator function. Complex analysis and operator theory, 4(2), pp. 449-469. Basel: Birkhäuser 10.1007/s11785-009-0019-z

Günther, Uwe; Langer, Heinz; Tretter, Christiane (2010). On the Spectrum of the Magnetohydrodynamic Mean-Field $\alpha^2$-Dynamo Operator. SIAM journal on mathematical analysis, 42(3), pp. 1413-1447. Philadelphia, Pa.: Society for Industrial and Applied Mathematics SIAM 10.1137/100782024

Brown, B. Malcolm; Langer, Matthias; Marletta, Marco; Tretter, Christiane; Wagenhofer, Markus (2010). Eigenvalue enclosures and exclosures for non-self-adjoint problems in hydrodynamics. LMS journal of computation and mathematics, 13, pp. 65-81. London: London Mathematical Society 10.1112/S1461157008000466


Tretter, Christiane (2009). Spectral inclusion for unbounded block opeerator matrices. Journal of functional analysis, 256(11), pp. 3806-3829. Amsterdam: Elsevier 10.1016/j.jfa.2008.12.024

Tretter, Christiane (2009). In memoriam Israel Gohberg (23.8.1928-12.10.2009). Integral equations and operator theory, 65(3), pp. 305-306. Basel: Birkhäuser 10.1007/s00020-009-1730-x


Langer, Heinz; Najman, Branko; Tretter, Christiane (2008). Spectral theory of the Klein-Gordon equation in Krein spaces. Proceedings of the Edinburgh Mathematical Society, 51(3), pp. 711-750. Cambridge: Cambridge University Press 10.1017/S0013091506000150

Tretter, Christiane (2008). Spectral theory of block operator matrices and applications. London: Imperial College Press

Langer, Heinz; Langer, Matthias; Markus, Alexander; Tretter, Christiane (2008). The Virozub–Matsaev Condition and Spectrum of Definite Type for Self-adjoint Operator Functions. Complex analysis and operator theory, 2(1), pp. 99-134. Basel: Birkhäuser 10.1007/s11785-007-0032-z

Li, Chi-Kwong; Rodman, Leiba; Tretter, Christiane (2008). Preface and conference report. Linear and multilinear algebra, 56(1-2), pp. 1-2. Reading, UK: Taylor & Francis 10.1080/03081080701538074


Marletta, Marco; Tretter, Christiane (2007). Essential spectra of coupled systems of differential equations and applications in hydrodynamics. Journal of differential equations, 243(1), pp. 36-69. Orlando, Fla.: Elsevier 10.1016/j.jde.2007.09.002


Langer, Matthias; Tretter, Christiane (2006). Variational principles for eigenvalues of the Klein-Gordon equation. Journal of mathematical physics, 47(10), p. 103506. Melville, N.Y.: American Institute of Physics 10.1063/1.2345108

Denk, Robert; Möller, Manfred; Tretter, Christiane (2006). The spectrum of the multiplication operator associated with a family of operators in a Banach space. In: Förster, Karl-Heinz; Jonas, Peter; Langer, Heinz (eds.) Operator theory in Krein spaces and nonlinear eigenvalue problems. Operator Theory: Advances and Applications: Vol. 162 (pp. 103-116). Basel: Birkhäuser 10.1007/3-7643-7453-5_6

Langer, Heinz; Najman, Branko; Tretter, Christiane (2006). Spectral theory of the Klein-Gordon equation in Pontryagin spaces. Communications in mathematical physics, 267(1), pp. 159-180. Heidelberg: Springer 10.1007/s00220-006-0022-4

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