Baer, Christian; Bandara, Lashi First-order elliptic boundary value problems on manifolds with non-compact boundary. arXiv:2401.17784 Preprint, arXiv:2401.17784 [math.DG] (2024). MSC: 35J56 47A53 58J05 58J32 46E35 53C21 BibTeX Cite \textit{C. Baer} and \textit{L. Bandara}, ``First-order elliptic boundary value problems on manifolds with non-compact boundary'', Preprint, arXiv:2401.17784 [math.DG] (2024) Full Text: arXiv OA License
Bär, Christian; Hanke, Bernhard Boundary conditions for scalar curvature. (English) Zbl 07733276 Gromov, Mikhail L. (ed.) et al., Perspectives in scalar curvature. Vol. 2. Singapore: World Scientific. 325-377 (2023). Reviewer: Kai Köhler (Düsseldorf) MSC: 53C23 53C27 53C20 57R15 PDFBibTeX XMLCite \textit{C. Bär} and \textit{B. Hanke}, in: Perspectives in scalar curvature. Vol. 2. Singapore: World Scientific. 325--377 (2023; Zbl 07733276) Full Text: DOI arXiv
Baer, Christian; Hanke, Bernhard K-cowaist of manifolds with boundary. arXiv:2309.07503 Preprint, arXiv:2309.07503 [math.DG] (2023). MSC: 53C21 53C23 53C27 58J20 BibTeX Cite \textit{C. Baer} and \textit{B. Hanke}, ``K-cowaist of manifolds with boundary'', Preprint, arXiv:2309.07503 [math.DG] (2023) Full Text: arXiv OA License
Baer, Christian; Brendle, Simon; Hanke, Bernhard; Wang, Yipeng Scalar curvature rigidity of warped product metrics. arXiv:2306.04015 Preprint, arXiv:2306.04015 [math.DG] (2023). MSC: 53C20 53C21 53C27 BibTeX Cite \textit{C. Baer} et al., ``Scalar curvature rigidity of warped product metrics'', Preprint, arXiv:2306.04015 [math.DG] (2023) Full Text: arXiv OA License
Bär, Christian; Hanke, Bernhard Local flexibility for open partial differential relations. (English) Zbl 1497.35485 Commun. Pure Appl. Math. 75, No. 6, 1377-1415 (2022). MSC: 35R01 58A20 53B25 53B30 53A10 PDFBibTeX XMLCite \textit{C. Bär} and \textit{B. Hanke}, Commun. Pure Appl. Math. 75, No. 6, 1377--1415 (2022; Zbl 1497.35485) Full Text: DOI arXiv
Bär, Christian; Bandara, Lashi Boundary value problems for general first-order elliptic differential operators. (English) Zbl 1489.35073 J. Funct. Anal. 282, No. 12, Article ID 109445, 69 p. (2022). MSC: 35J56 58J05 58J32 PDFBibTeX XMLCite \textit{C. Bär} and \textit{L. Bandara}, J. Funct. Anal. 282, No. 12, Article ID 109445, 69 p. (2022; Zbl 1489.35073) Full Text: DOI arXiv
Baer, Christian; Gehring, Penelope The Cauchy problem for Lorentzian Dirac operators under non-local boundary conditions. arXiv:2210.15052 Preprint, arXiv:2210.15052 [math.DG] (2022). MSC: 58J45 35L50 BibTeX Cite \textit{C. Baer} and \textit{P. Gehring}, ``The Cauchy problem for Lorentzian Dirac operators under non-local boundary conditions'', Preprint, arXiv:2210.15052 [math.DG] (2022) Full Text: arXiv OA License
Baer, Christian; Hanke, Bernhard; Schick, Thomas Remarks on the paper ”On Gromov’s dihedral extremality and rigidity conjectures” by Jinmin Wang, Zhizhang Xie and Guoliang Yu. arXiv:2202.05180 Preprint, arXiv:2202.05180 [math.DG] (2022). BibTeX Cite \textit{C. Baer} et al., ``Remarks on the paper "On Gromov's dihedral extremality and rigidity conjectures" by Jinmin Wang, Zhizhang Xie and Guoliang Yu'', Preprint, arXiv:2202.05180 [math.DG] (2022) Full Text: arXiv OA License
Bär, Christian; Mazzeo, Rafe Manifolds with many Rarita-Schwinger fields. (English) Zbl 1479.53061 Commun. Math. Phys. 384, No. 1, 533-548 (2021). MSC: 53C27 58J60 32Q20 PDFBibTeX XMLCite \textit{C. Bär} and \textit{R. Mazzeo}, Commun. Math. Phys. 384, No. 1, 533--548 (2021; Zbl 1479.53061) Full Text: DOI arXiv
Baer, Christian; Strohmaier, Alexander Local Index Theory for Lorentzian Manifolds. arXiv:2012.01364 Preprint, arXiv:2012.01364 [math.DG] (2020). MSC: 58J20 58J45 35L02 35L05 58J32 BibTeX Cite \textit{C. Baer} and \textit{A. Strohmaier}, ``Local Index Theory for Lorentzian Manifolds'', Preprint, arXiv:2012.01364 [math.DG] (2020) Full Text: arXiv OA License
Bär, Christian; Strohmaier, Alexander An index theorem for Lorentzian manifolds with compact spacelike Cauchy boundary. (English) Zbl 1429.83004 Am. J. Math. 141, No. 5, 1421-1455 (2019). MSC: 83C05 83C60 53C50 58J20 58J45 PDFBibTeX XMLCite \textit{C. Bär} and \textit{A. Strohmaier}, Am. J. Math. 141, No. 5, 1421--1455 (2019; Zbl 1429.83004) Full Text: DOI arXiv Link
Bär, Christian; Hannes, Sebastian Boundary value problems for the Lorentzian Dirac operator. (English) Zbl 1422.58005 Andersen, Jørgen Ellegaard (ed.) et al., Geometry and physics. A festschrift in honour of Nigel Hitchin. Volume 1. Oxford: Oxford University Press. 3-18 (2018). Reviewer: Vicenţiu D. Rădulescu (Craiova) MSC: 58J32 58J20 58J45 53C27 PDFBibTeX XMLCite \textit{C. Bär} and \textit{S. Hannes}, in: Geometry and physics. A festschrift in honour of Nigel Hitchin. Volume 1. Oxford: Oxford University Press. 3--18 (2018; Zbl 1422.58005) Full Text: arXiv
Andersson, Lars; Bär, Christian Wave and Dirac equations on manifolds. (English) Zbl 1417.83003 Brüning, Jochen (ed.) et al., Space – time – matter. Analytic and geometric structures. Berlin: De Gruyter. 324-348 (2018). MSC: 83C05 83C57 81Q05 35L05 83C60 58J45 53C50 53C27 PDFBibTeX XMLCite \textit{L. Andersson} and \textit{C. Bär}, in: Space -- time -- matter. Analytic and geometric structures. Berlin: De Gruyter. 324--348 (2018; Zbl 1417.83003) Full Text: arXiv
Bär, Christian; Ballmann, Werner Guide to elliptic boundary value problems for Dirac-type operators. (English) Zbl 1377.58022 Ballmann, Werner (ed.) et al., Arbeitstagung Bonn 2013. In memory of Friedrich Hirzebruch. Proceedings of the meeting, Bonn, Germany, May, 22–28, 2013. Basel: Birkhäuser/Springer (ISBN 978-3-319-43646-3/hbk; 978-3-319-43648-7/ebook). Progress in Mathematics 319, 43-80 (2016). Reviewer: Mohammed El Aïdi (Bogotá) MSC: 58J32 58J05 35J56 58J20 PDFBibTeX XMLCite \textit{C. Bär} and \textit{W. Ballmann}, Prog. Math. 319, 43--80 (2016; Zbl 1377.58022) Full Text: DOI arXiv Link
Bär, Christian; Strohmaier, Alexander A rigorous geometric derivation of the chiral anomaly in curved backgrounds. (English) Zbl 1350.81029 Commun. Math. Phys. 347, No. 3, 703-721 (2016). MSC: 81T50 81T20 81V17 81T13 PDFBibTeX XMLCite \textit{C. Bär} and \textit{A. Strohmaier}, Commun. Math. Phys. 347, No. 3, 703--721 (2016; Zbl 1350.81029) Full Text: DOI arXiv Link
Bär, Christian; Wafo, Roger Tagne Initial value problems for wave equations on manifolds. (English) Zbl 1338.58018 Math. Phys. Anal. Geom. 18, No. 1, Article ID 7, 29 p. (2015). MSC: 58J45 35L05 35L15 35R01 PDFBibTeX XMLCite \textit{C. Bär} and \textit{R. T. Wafo}, Math. Phys. Anal. Geom. 18, No. 1, Article ID 7, 29 p. (2015; Zbl 1338.58018) Full Text: DOI arXiv
Bär, Christian; Becker, Christian Differential characters and geometric chains. (English) Zbl 1304.53019 Bär, Christian et al., Differential characters. Cham: Springer (ISBN 978-3-319-07033-9/pbk; 978-3-319-07034-6/ebook). Lecture Notes in Mathematics 2112, 1-90 (2014). Reviewer: Ioan Pop (Iaşi) MSC: 53C08 55N20 55R10 57P99 58A40 PDFBibTeX XMLCite \textit{C. Bär} and \textit{C. Becker}, Lect. Notes Math. 2112, 1--90 (2014; Zbl 1304.53019) Full Text: DOI arXiv
Bär, Christian; Becker, Christian Differential characters. (English) Zbl 1296.58002 Lecture Notes in Mathematics 2112. Cham: Springer (ISBN 978-3-319-07033-9/pbk; 978-3-319-07034-6/ebook). viii, 187 p. (2014). MSC: 58-06 58-02 58J28 55N20 PDFBibTeX XMLCite \textit{C. Bär} and \textit{C. Becker}, Differential characters. Cham: Springer (2014; Zbl 1296.58002) Full Text: DOI
Brunetti, Romeo (ed.); Bär, Christian (ed.); Dappiaggi, Claudio (ed.); Fredenhagen, Klaus (ed.) Mini-workshop: New crossroads between mathematics and field theory. Abstracts from the mini-workshop held July 21–27, 2013. (English) Zbl 1349.00086 Oberwolfach Rep. 10, No. 3, 2155-2177 (2013). MSC: 00B05 00B25 81-06 81T05 81T20 81T13 PDFBibTeX XMLCite \textit{R. Brunetti} (ed.) et al., Oberwolfach Rep. 10, No. 3, 2155--2177 (2013; Zbl 1349.00086) Full Text: DOI
Bär, Christian; Ballmann, Werner Boundary value problems for elliptic differential operators of first order. (English) Zbl 1331.58022 Cao, Huai-Dong (ed.) et al., In memory of C. C. Hsiung. Lectures given at the JDG symposium on geometry and topology, Lehigh University, Bethlehem, PA, USA, May 28–30, 2010. Somerville, MA: International Press (ISBN 978-1-57146-237-4/hbk). Surveys in Differential Geometry 17, 1-78 (2012). MSC: 58J05 58J20 35J56 58J32 PDFBibTeX XMLCite \textit{C. Bär} and \textit{W. Ballmann}, Surv. Differ. Geom. 17, 1--78 (2012; Zbl 1331.58022) Full Text: arXiv
Sanz-Solé, Marta; Atiyah, Michael; Bär, Christian; Greuel, Gert-Martin; Manin, Yuri I.; Bourguignon, Jean-Pierre Friedrich Hirzebruch memorial session at the 6th European congress of mathematics. Kraków, July 5th, 2012. (English) Zbl 1264.01020 Eur. Math. Soc. Newsl. 85, 12-20 (2012). MSC: 01A65 01A70 01A60 PDFBibTeX XMLCite \textit{M. Sanz-Solé} et al., Eur. Math. Soc. Newsl. 85, 12--20 (2012; Zbl 1264.01020)
Bär, Christian; Ginoux, Nicolas CCR- versus CAR-quantization on curved spacetimes. (English) Zbl 1250.81073 Finster, Felix (ed.) et al., Quantum field theory and gravity. Conceptual and mathematical advances in the search for a unified framework. Papers based on the presentations at the conference, Regensburg, Germany, September 28 to October 1, 2010. Berlin: Springer (ISBN 978-3-0348-0042-6/hbk; 978-3-0348-0043-3/ebook). 183-206 (2012). MSC: 81T20 58J45 35L40 81T70 PDFBibTeX XMLCite \textit{C. Bär} and \textit{N. Ginoux}, in: Quantum field theory and gravity. Conceptual and mathematical advances in the search for a unified framework. Papers based on the presentations at the conference, Regensburg, Germany, September 28 to October 1, 2010. Berlin: Springer. 183--206 (2012; Zbl 1250.81073) Full Text: DOI HAL
Bär, Christian; Ginoux, Nicolas Classical and quantum fields on Lorentzian manifolds. (English) Zbl 1254.81044 Bär, Christian (ed.) et al., Global differential geometry. Berlin: Springer (ISBN 978-3-642-22841-4/hbk; 978-3-642-22842-1/ebook). Springer Proceedings in Mathematics 17, 359-400 (2012). Reviewer: Dimitar A. Kolev (Sofia) MSC: 81Q35 53C50 53C80 55R25 35Q41 58J90 81T20 PDFBibTeX XMLCite \textit{C. Bär} and \textit{N. Ginoux}, Springer Proc. Math. 17, 359--400 (2012; Zbl 1254.81044) Full Text: DOI arXiv
Bär, Christian (ed.); Lohkamp, Joachim (ed.); Schwarz, Matthias (ed.) Global differential geometry. (English) Zbl 1230.53005 Springer Proceedings in Mathematics 17. Berlin: Springer (ISBN 978-3-642-22841-4/hbk; 978-3-642-22842-1/ebook). viii, 521 p. (2012). MSC: 53-06 53Cxx 53Dxx 00B15 PDFBibTeX XMLCite \textit{C. Bär} (ed.) et al., Global differential geometry. Berlin: Springer (2012; Zbl 1230.53005) Full Text: DOI arXiv
Bär, Christian; Pfäffle, Frank Wiener measures on Riemannian manifolds and the Feynman-Kac formula. (English) Zbl 1302.58017 Mat. Contemp. 40, 37-90 (2011). Reviewer: Isamu Dôku (Saitama) MSC: 58J65 58J35 PDFBibTeX XMLCite \textit{C. Bär} and \textit{F. Pfäffle}, Mat. Contemp. 40, 37--90 (2011; Zbl 1302.58017) Full Text: arXiv
Bär, Christian; Pfäffle, Frank Asymptotic heat kernel expansion in the semi-classical limit. (English) Zbl 1211.58018 Commun. Math. Phys. 294, No. 3, 731-744 (2010). Reviewer: Dian K. Palagachev (Bari) MSC: 58J37 58J35 58J50 PDFBibTeX XMLCite \textit{C. Bär} and \textit{F. Pfäffle}, Commun. Math. Phys. 294, No. 3, 731--744 (2010; Zbl 1211.58018) Full Text: DOI arXiv
Bär, Christian; Bessa, G. Pacelli Stochastic completeness and volume growth. (English) Zbl 1201.58024 Proc. Am. Math. Soc. 138, No. 7, 2629-2640 (2010). Reviewer: Jean Picard (Aubière) MSC: 58J65 58J35 PDFBibTeX XMLCite \textit{C. Bär} and \textit{G. P. Bessa}, Proc. Am. Math. Soc. 138, No. 7, 2629--2640 (2010; Zbl 1201.58024) Full Text: DOI arXiv
Bär, Christian; Becker, Christian \(C^*\)-algebras. (English) Zbl 1185.46037 Bär, Christian (ed.) et al., Quantum field theory on curved spacetimes. Concepts and mathematical foundations. Extended lecture notes of the compact course quantum field theory on curved spacetimes, Potsdam, Germany, October 2007. Berlin: Springer (ISBN 978-3-642-02779-6/hbk; 978-3-642-02780-2/ebook). Lecture Notes in Physics 786, 1-37 (2009). MSC: 46L05 46L60 81T05 81R15 81T20 46-01 PDFBibTeX XMLCite \textit{C. Bär} and \textit{C. Becker}, Lect. Notes Phys. 786, 1--37 (2009; Zbl 1185.46037) Full Text: DOI
Bär, Christian (ed.); Fredenhagen, Klaus (ed.) Quantum field theory on curved spacetimes. Concepts and mathematical foundations. Extended lecture notes of the compact course quantum field theory on curved spacetimes, Potsdam, Germany, October 2007. (English) Zbl 1178.81003 Lecture Notes in Physics 786. Berlin: Springer (ISBN 978-3-642-02779-6/hbk; 978-3-642-02780-2/ebook). x, 160 p. (2009). MSC: 81-06 81Q70 53Z05 00B25 PDFBibTeX XMLCite \textit{C. Bär} (ed.) and \textit{K. Fredenhagen} (ed.), Quantum field theory on curved spacetimes. Concepts and mathematical foundations. Extended lecture notes of the compact course quantum field theory on curved spacetimes, Potsdam, Germany, October 2007. Berlin: Springer (2009; Zbl 1178.81003) Full Text: DOI
Bär, Christian; Pfäffle, Frank Path integrals on manifolds by finite dimensional approximation. (English) Zbl 1165.58015 J. Reine Angew. Math. 625, 29-57 (2008). Reviewer: Yuri E. Gliklikh (Voronezh) MSC: 58J65 58J35 PDFBibTeX XMLCite \textit{C. Bär} and \textit{F. Pfäffle}, J. Reine Angew. Math. 625, 29--57 (2008; Zbl 1165.58015) Full Text: DOI arXiv
Bär, Christian; Ginoux, Nicolas; Pfäffle, Frank Wave equations on Lorentzian manifolds and quantization. (English) Zbl 1118.58016 ESI Lectures in Mathematics and Physics. Zürich: European Mathematical Society Publishing House (ISBN 978-3-03719-037-1/pbk). viii, 194 p. (2007). Reviewer: Bülent Ünal (Ankara) MSC: 58J45 81T20 58-02 81-02 35L05 35L15 53C50 81T50 PDFBibTeX XMLCite \textit{C. Bär} et al., Wave equations on Lorentzian manifolds and quantization. Zürich: European Mathematical Society Publishing House (2007; Zbl 1118.58016) Full Text: DOI arXiv Backlinks: MO MO
Bär, Christian (ed.); Sitarz, Andrzej (ed.) Dirac operators in differential and noncommutative geometry. Abstracts from the mini-workshop held November 26 – December 2, 2006. (English) Zbl 1177.58001 Oberwolfach Rep. 3, No. 4, 3131-3188 (2006). MSC: 58-06 53-06 53C27 58J50 00B05 PDFBibTeX XMLCite \textit{C. Bär} (ed.) and \textit{A. Sitarz} (ed.), Oberwolfach Rep. 3, No. 4, 3131--3188 (2006; Zbl 1177.58001) Full Text: DOI Link
Bär, Christian; Gauduchon, Paul; Moroianu, Andrei Generalized cylinders in semi-Riemannian and spin geometry. (English) Zbl 1068.53030 Math. Z. 249, No. 3, 545-580 (2005). MSC: 53C27 53A07 53B30 PDFBibTeX XMLCite \textit{C. Bär} et al., Math. Z. 249, No. 3, 545--580 (2005; Zbl 1068.53030) Full Text: DOI arXiv
Bär, Christian; Dahl, Mattias The first Dirac eigenvalues on manifolds with positive scalar curvature. (English) Zbl 1053.58012 Proc. Am. Math. Soc. 132, No. 11, 3337-3344 (2004). Reviewer: Mircea Craioveanu (Timişoara) MSC: 58J50 53C27 58J60 PDFBibTeX XMLCite \textit{C. Bär} and \textit{M. Dahl}, Proc. Am. Math. Soc. 132, No. 11, 3337--3344 (2004; Zbl 1053.58012) Full Text: DOI arXiv
Bär, Christian; Moroianu, Sergiu Heat kernel asymptotics for roots of generalized Laplacians. (English) Zbl 1079.58020 Int. J. Math. 14, No. 4, 397-412 (2003). MSC: 58J40 58J37 58J35 58J42 PDFBibTeX XMLCite \textit{C. Bär} and \textit{S. Moroianu}, Int. J. Math. 14, No. 4, 397--412 (2003; Zbl 1079.58020) Full Text: DOI
Bär, Christian; Dahl, Matthias Small eigenvalues of the conformal Laplacian. (English) Zbl 1030.58003 Geom. Funct. Anal. 13, No. 3, 483-508 (2003). Reviewer: Enrique Outerelo (Madrid) MSC: 58C40 53C21 PDFBibTeX XMLCite \textit{C. Bär} and \textit{M. Dahl}, Geom. Funct. Anal. 13, No. 3, 483--508 (2003; Zbl 1030.58003) Full Text: DOI arXiv
Bär, Christian; Schopka, Sven The Dirac determinant of spherical space forms. (English) Zbl 1049.58030 Hildebrandt, Stefan (ed.) et al., Geometric analysis and nonlinear partial differential equations. Berlin: Springer (ISBN 3-540-44051-8/hbk). 39-67 (2003). Reviewer: Ilka Agricola (Berlin) MSC: 58J52 81T16 11S40 PDFBibTeX XMLCite \textit{C. Bär} and \textit{S. Schopka}, in: Geometric analysis and nonlinear partial differential equations. Berlin: Springer. 39--67 (2003; Zbl 1049.58030)
Ammann, Bernd; Bär, Christian The Einstein-Hilbert action as a spectral action. (English) Zbl 1255.81218 Scheck, Florian (ed.) et al., Noncommutative geometry and the standard model of elementary particle physics. Proceedings of the conference, Hesselberg, Germany, March 14–19, 1999. Berlin: Springer (ISBN 3-540-44071-2/hbk). Lect. Notes Phys. 596, 75-108 (2002). MSC: 81T75 58B34 58J42 83C65 47L90 81R60 81V22 PDFBibTeX XMLCite \textit{B. Ammann} and \textit{C. Bär}, Lect. Notes Phys. 596, 75--108 (2002; Zbl 1255.81218)
Bär, Christian; Dahl, Mattias Surgery and the spectrum of the Dirac operator. (English) Zbl 1017.58019 J. Reine Angew. Math. 552, 53-76 (2002). Reviewer: Sebastian Goette (Tübingen) MSC: 58J50 57R65 PDFBibTeX XMLCite \textit{C. Bär} and \textit{M. Dahl}, J. Reine Angew. Math. 552, 53--76 (2002; Zbl 1017.58019) Full Text: DOI arXiv
Ammann, Bernd; Bär, Christian Dirac eigenvalue estimates on surfaces. (English) Zbl 1007.58014 Math. Z. 240, No. 2, 423-449 (2002). Reviewer: Peter B.Gilkey (Eugene) MSC: 58J50 53A05 53C27 PDFBibTeX XMLCite \textit{B. Ammann} and \textit{C. Bär}, Math. Z. 240, No. 2, 423--449 (2002; Zbl 1007.58014) Full Text: DOI arXiv
Bär, Christian; Strohmaier, Alexander Semi-bounded restrictions of Dirac type operators and the unique continuation property. (English) Zbl 1031.58008 Differ. Geom. Appl. 15, No. 2, 175-182 (2001). Reviewer: Dian K.Palagachev (Bari) MSC: 58J05 35B05 81T20 58J60 35B60 PDFBibTeX XMLCite \textit{C. Bär} and \textit{A. Strohmaier}, Differ. Geom. Appl. 15, No. 2, 175--182 (2001; Zbl 1031.58008) Full Text: DOI arXiv
Ammann, Bernd; Bär, Christian Dirac eigenvalues and total scalar curvature. (English) Zbl 0960.58014 J. Geom. Phys. 33, No. 3-4, 229-234 (2000). Reviewer: Helga Baum (Berlin) MSC: 58J50 PDFBibTeX XMLCite \textit{B. Ammann} and \textit{C. Bär}, J. Geom. Phys. 33, No. 3--4, 229--234 (2000; Zbl 0960.58014) Full Text: DOI arXiv
Bär, Christian; Bleecker, David The Dirac operator and the scalar curvature of continuously deformed algebraic varieties. (English) Zbl 0951.53028 Booss-Bavnbek, Bernhelm (ed.) et al., Geometric aspects of partial differential equations. Proceedings of a minisymposium on spectral invariants, heat equation approach, Roskilde, Denmark, September 18-19, 1998. Providence, RI: American Mathematical Society. Contemp. Math. 242, 3-24 (1999). Reviewer: Anton Deitmar (Exeter) MSC: 53C21 58J60 53C27 PDFBibTeX XMLCite \textit{C. Bär} and \textit{D. Bleecker}, Contemp. Math. 242, 3--24 (1999; Zbl 0951.53028)
Bär, Ch.; Bleecker, D. Connections on soldered principal bundles. (English) Zbl 1010.53023 Acta Phys. Pol. B 29, No. 4, 891-903 (1998). MSC: 53C05 53C80 PDFBibTeX XMLCite \textit{Ch. Bär} and \textit{D. Bleecker}, Acta Phys. Pol. B 29, No. 4, 891--903 (1998; Zbl 1010.53023)
Ammann, Bernd; Bär, Christian The Dirac operator on nilmanifolds and collapsing circle bundles. (English) Zbl 0911.58037 Ann. Global Anal. Geom. 16, No. 3, 221-253 (1998). Reviewer: Sergui I.Văcaru (Chisinau) MSC: 58J50 58J60 53C25 53C30 PDFBibTeX XMLCite \textit{B. Ammann} and \textit{C. Bär}, Ann. Global Anal. Geom. 16, No. 3, 221--253 (1998; Zbl 0911.58037) Full Text: DOI arXiv
Bär, Christian; Schmutz, Paul Harmonic spinors on Riemann surfaces. (English) Zbl 0763.30017 Ann. Global Anal. Geom. 10, No. 3, 263-273 (1992). Reviewer: H.Köditz (Hannover) MSC: 30F10 PDFBibTeX XMLCite \textit{C. Bär} and \textit{P. Schmutz}, Ann. Global Anal. Geom. 10, No. 3, 263--273 (1992; Zbl 0763.30017) Full Text: DOI