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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
Arlinskiĭ, Yury; Tretter, Christiane (2023). Maximal sectorial operators and invariant operator ranges. Journal of mathematical analysis and applications, 528(2), p. 127475. Elsevier 10.1016/j.jmaa.2023.127475
Bögli, S.; Ferraresso, F.; Marletta, M.; Tretter, C. (2023). Spectral analysis and domain truncation for Maxwell's equations. Journal de Mathématiques Pures et Appliquées, 170, pp. 96-135. Elsevier 10.1016/j.matpur.2022.12.004
Gerhat, Borbala; Tretter, Christiane (2022). Pseudo Numerical Ranges and Spectral Enclosures. Complex analysis and operator theory, 16(6), p. 78. Springer 10.1007/s11785-022-01232-9
Hefti, Nicolas; Tretter, Christiane (2022). Essential numerical range and C-numerical range for unbounded operators. Studia mathematica, 264(3), pp. 305-333. Polish Academy of Sciences 10.4064/sm201231-16-9
Tretter, Christiane (2021). Eigenvalue accumulation and bounds for non-selfadjoint matrix differential operators related to NLS. In: Exner, Pavel; Frank, Rupert L.; Gesztesy, Fritz; Holden, Helge; Weidl, Timo (eds.) Partial differential equations, spectral theory, and mathematical physics. EMS Series of Congress Reports (pp. 445-456). European Mathematical Society 10.4171/ECR/18-1/26
Langer, Heinz; Tretter, Christiane (2021). Maximal J-semi-definite invariant subspaces of unbounded J-selfadjoint operators in Krein spaces. Journal of mathematical analysis and applications, 494(2), p. 124597. Elsevier 10.1016/j.jmaa.2020.124597
Arlinskiĭ, Yury; Tretter, Christiane (2020). Everything is possible for the domain intersection ${\rm dom}\,T\cap{\rm dom}\,T*$. Advances in mathematics, 374, p. 107383. Elsevier 10.1016/j.aim.2020.107383
Bögli, Sabine; Marletta, Marco; Tretter, Christiane (2020). The essential numerical range for unbounded linear operators. Journal of functional analysis, 279(1), p. 108509. Elsevier 10.1016/j.jfa.2020.108509
Boegli, Sabine; Tretter, Christiane (2020). Eigenvalues of magnetohydrodynamic mean-field dynamo models: bounds and reliable computation. SIAM journal on applied mathematics, 80(5), pp. 2194-2225. Society for Industrial and Applied Mathematics 10.1137/19M1286359
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 (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
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
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
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
