Urs Frauenfelder and Joa Weber
A mathematical description of the Weber nucleus as a classical and quantum mechanical system
Analysis and Mathematical Physics 14, 31 (2024)
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Agustin Moreno, Cengiz Aydin, Otto van Koert, Urs Frauenfelder and Dayung Koh
Bifurcation graphs for the CR3BP via symplectic methods: on the Jupiter–Europa and Saturn–Enceladus systems
The Journal of the Astronautical Sciences 71, 51 (2024)
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Urs Frauenfelder
A compactness theorem for frozen planets
Journal of Topology and Analysis 15, 527-543 (2023)
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Kai Cieliebak, Urs Frauenfelder and Evgeny Volkov
A variational approach to frozen planet orbits in helium
Annales de l'Institut Henri Poincaré C, Analyse Non Linéaire 40, 379-455 (2023)
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Kai Cieliebak, Urs Frauenfelder and Evgeny Volkov
Nondegeneracy and integral count of frozen planet orbits in helium
Tunisian Journal of Mathematics 5, 713-770 (2023)
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Urs Frauenfelder
Nullity bounds for certain Hamiltonian delay equations
Kyoto Journal of Mathematics 63, 195-209 (2023)
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Urs Frauenfelder and Agustin Moreno
On doubly symmetric periodic orbits
Celestial Mechanics and Dynamical Astronomy 135, 20 (2023)
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Urs Frauenfelder
Rezension: Craig?A.?Stephenson: Periodic orbits. F.?R.?Moulton’s quest for a new lunar theory, History of Mathematics 45.?Providence, RI: American Mathematical Society 2021, 255?Seiten
Mathematische Semesterberichte 70, 73-75 (Springer: Berlin, 2023)
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Urs Frauenfelder, Dayung Koh and Agustin Moreno
Symplectic methods in the numerical search of orbits in real-life planetary systems
SIAM Journal on Applied Dynamical Systems 22, 3284-3319 (2023)
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Urs Frauenfelder
The Stark problem as a concave toric domain
Geometriae Dedicata 217, 10 (2023)
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Urs Frauenfelder
V-shaped action functional with delay
Regular and Chaotic Dynamics 28, 364-373 (2023)
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Kai Cieliebak, Urs Frauenfelder and Lei Zhao
J(+)-invariants for planar two-center Stark–Zeeman systems
Ergodic Theory and Dynamical Systems , 1-35 (2022)
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Kai Cieliebak, Urs Frauenfelder and M. Schwingenheuer
On Langmuir's periodic orbit
Archiv der Mathematik 118, 413-425 (2022)
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Urs Frauenfelder, Otto van Koert and Lei Zhao
On the problem of convexity for the restricted three-body problem around the heavy primary
Hokkaido Mathematical Journal 51, 287-317 (2022)
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Urs Frauenfelder
Helium and Hamiltonian delay equations
Israel Journal of Mathematics 246, 239-260 (2021)
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Urs Frauenfelder and J. Weber
The regularized free fall I. index computations
Russian Journal of Mathematical Physics 28, 464-487 (2021)
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Urs Frauenfelder and Joa Weber
The shift map on Floer trajectory spaces
Journal of symplectic geometry 19, 351-397 (2021)
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Wolfgang Brütting, Mirjam Dür, Ulrich Eckern, Urs Frauenfelder, Malte A. Peter and Andreas W. Rathgeber
Die Mathematisch-Naturwissenschaftlich-Technische Fakult?t: immer auch die Anwendung im Blick
in: Wissenschaft, Kreativit?t, Verantwortung - 50 Jahre Universit?t Augsburg, ed. by Hubert Zapf, 166-181 (Schnell & Steiner: Regensburg, 2020)
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Peter Albers, Urs Frauenfelder and Felix Schlenk
Hamiltonian delay equations: examples and a lower bound for the number of periodic solutions
Advances in Mathematics 373, 107319 (2020)
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Urs Frauenfelder and Lei Zhao
Transverse regularizations of central force problems by Hamiltonian structure
in: Proceedings of the International Consortium of Chinese Mathematicians, 27 - 29 December 2018, second annual meeting, Taipei, Taiwan, ed. by Lizhen Ji and Shing-Tung Yau, 539-552 (International Press of Boston: Somerville, MA, 2020)
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Urs Frauenfelder, Christian Lange and Stefan Suhr
A Hamiltonian version of a result of Gromoll and Grove
Annales de l'Institut Fourier 69, 409-419 (2019)
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Peter Albers, Urs Frauenfelder and Felix Schlenk
A compactness result for non-local unregularized gradient flow lines
Journal of Fixed Point Theory and Applications 21, 34 (2019)
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Edward Belbruno, Urs Frauenfelder and Otto van Koert
A family of periodic orbits in the three-dimensional lunar problem
Celestial Mechanics and Dynamical Astronomy 131, 7 (2019)
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Peter Albers, Urs Frauenfelder and Felix Schlenk
An iterated graph construction and periodic orbits of Hamiltonian delay equations
Journal of Differential Equations 266, 2466-2492 (2019)
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Urs Frauenfelder and Lei Zhao
Existence of either a periodic collisional orbit or infinitely many consecutive collision orbits in the planar circular restricted three-body problem
Mathematische Zeitschrift 291, 215-225 (2019)
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Urs Frauenfelder and Joa Weber
The fine structure of Weber’s hydrogen atom: Bohr–Sommerfeld approach
Zeitschrift für angewandte Mathematik und Physik 70, 105 (2019)
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Urs Frauenfelder and Otto van Koert
The restricted three-body problem and holomorphic curves
(Pathways in Mathematics (PATHMATH)) (Springer International Publishing: Cham, 2018)
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Urs Frauenfelder and Andrei Pajitnov
Finiteness of π1-sensitive Hofer–Zehnder capacity and equivariant loop space homology
Journal of Fixed Point Theory and Applications 19, 3-15 (2017)
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Kai Cieliebak, Urs Frauenfelder and Otto van Koert
Periodic orbits in the restricted three-body problem and Arnold’s J+-invariant
Regular and Chaotic Dynamics 22, 408-434 (2017)
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Urs Frauenfelder, Otto van Koert and Lei Zhao
A convex embedding for the rotating Kepler problem
preprint (2016)
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Peter Albers and Urs Frauenfelder
Bubbles and Onis
Journal of Fixed Point Theory and Applications 19, 85-112 (2016)
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Peter Albers, Urs Frauenfelder and Alexandru Oancea
Local systems on the free loop space and finiteness of the Hofer-Zehnder capacity
Mathematische Annalen 367, 1403-1428 (2016)
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Urs Frauenfelder and Jungsoo Kang
Real holomorphic curves and invariant global surfaces of section
Proceedings of the London Mathematical Society 112, 477-511 (2016)
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Urs Frauenfelder and Felix Schlenk
S^1-equivariant Rabinowitz-Floer homology
Hokkaido Mathematical Journal 45, 293-323 (2016)
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Urs Frauenfelder and Otto van Koert
Symmetric periodic orbits and uniruled real Liouville domains
Chinese Annals of Mathematics, Series B 37, 607-624 (2016)
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Peter Albers, Kai Cieliebak and Urs Frauenfelder
Symplectic Tate homology
Proceedings of the London Mathematical Society 112, 169-205 (2016)
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Urs Frauenfelder, Will J. Merry and Gabriel P. Paternain
Floer homology for non-resonant magnetic fields on flat tori
Nonlinearity 28, 1351-1370 (2015)
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Urs Frauenfelder and Kai Zehmisch
Gromov compactness for holomorphic discs with totally real boundary conditions
Journal of Fixed Point Theory and Applications 17, 521-540 (2015)
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Urs Frauenfelder, Clémence Labrousse and Felix Schlenk
Slow volume growth for Reeb flows on spherizations and contact Bott-Samelson theorems
Journal of Topology and Analysis 07, 407-451 (2015)
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Peter Albers, Urs Frauenfelder and Jake Solomon
A Gamma-structure on Lagrangian Grassmannians
Commentarii Mathematici Helvetici 89, 929-936 (2014)
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Urs Frauenfelder and Felix Schlenk
Filtered Hopf algebras and counting geodesic chords
Mathematische Annalen 360, 995-1020 (2014)
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Peter Albers and Urs Frauenfelder
Square roots of Hamiltonian diffeomorphisms
Journal of Symplectic Geometry 12, 427-434 (2014)
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Kai Cieliebak, Urs Frauenfelder and Otto van Koert
The Finsler geometry of the rotating Kepler problem
Publicationes Mathematicae Debrecen 84, 333-350 (2014)
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Urs Frauenfelder and Otto van Koert
The H?rmander index of symmetric periodic orbits
Geometriae Dedicata 168, 197-205 (2014)
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Urs Frauenfelder
Dihedral homology and the moon
Journal of Fixed Point Theory and Applications 14, 55-69 (2013)
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Peter Albers and Urs Frauenfelder
Exponential decay for sc-gradient flow lines
Journal of Fixed Point Theory and Applications 13, 571-586 (2013)
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Peter Albers and Urs Frauenfelder
A variational approach to Givental's nonlinear Maslov index
Geometric and Functional Analysis 22, 1033-1050 (2012)
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Urs Frauenfelder, Felix Schlenk and Otto van Koert
Displaceability and the mean Euler characteristic
Kyoto Journal of Mathematics 52, 797-815 (2012)
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Urs Frauenfelder, Will J. Merry and Gabriel P. Paternain
Floer homology for magnetic fields with at most linear growth on the universal cover
Journal of Functional Analysis 262, 3062-3090 (2012)
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Peter Albers and Urs Frauenfelder
Infinitely many leaf-wise intersections on cotangent bundles
Expositiones Mathematicae 30, 168-181 (2012)
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Peter Albers and Urs Frauenfelder
On a theorem by Ekeland-Hofer
Israel Journal of Mathematics 187, 485-491 (2012)
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Peter Albers, Joel W. Fish, Urs Frauenfelder and Otto van Koert
The Conley–Zehnder indices of the rotating Kepler problem
Mathematic