Zobrazeno 1 - 10
of 1 161
pro vyhledávání: '"A. Geiges"'
We classify Legendrian realisations, up to coarse equivalence, of the Hopf link in the lens spaces L(p,1) with any contact structure.
Comment: 28 pages, 15 figures
Comment: 28 pages, 15 figures
Externí odkaz:
http://arxiv.org/abs/2409.02582
Autor:
A. Geiges, A. Nauels, P. Y. Parra, M. Andrijevic, W. Hare, P. Pfleiderer, M. Schaeffer, C.-F. Schleussner
Publikováno v:
Earth System Dynamics, Vol 11, Pp 697-708 (2020)
Current global mitigation ambition up to 2030 under the Paris Agreement, reflected in the National Determined Contributions (NDCs), is insufficient to achieve the agreement's 1.5 ∘C long-term temperature limit. As governments are preparing new an
Externí odkaz:
https://doaj.org/article/6da842fad81c416fb5ec03a65acb1804
Publikováno v:
J. Lond. Math. Soc. (2) 109 (2024), e12859, 42pp
This paper is devoted to studying a notion of Bott integrability for Reeb flows on contact 3-manifolds. We show, in analogy with work of Fomenko-Zieschang on Hamiltonian flows in dimension 4, that Bott-integrable Reeb flows exist precisely on graph m
Externí odkaz:
http://arxiv.org/abs/2302.07701
Publikováno v:
Anal. Math. Phys. 13 (2023), Paper No. 11, 11 pp
We present a simple example for the failure of the Calder\'on-Zygmund estimate for the $\bar{\partial}$-operator when the Sobolev $(k,p)$-norms are replaced by the $C^k$-norms. This example is discussed in the context of elliptic bootstrapping, Fredh
Externí odkaz:
http://arxiv.org/abs/2207.08509
Autor:
Geiges, Hansjörg, Thies, Norman
Publikováno v:
Involve 16 (2023) 621-636
Bredon and Wood have given a complete answer to the embeddability question for nonorientable surfaces in lens spaces. They formulate their result in terms of a recursive formula that determines, for a given lens space, the minimal genus of embeddable
Externí odkaz:
http://arxiv.org/abs/2205.04909
Autor:
Staudner, Tobias, Geiges, Linda, Khamseekaew, Juthamas, Sure, Florian, Korbmacher, Christoph, Ilyaskin, Alexandr V.
Publikováno v:
In Journal of Biological Chemistry August 2024 300(8)
Autor:
Albach, Bernhard, Geiges, Hansjörg
Publikováno v:
Arnold Math. J. 7 (2021), 573-597
We classify global surfaces of section for flows on 3-manifolds defining Seifert fibrations. We discuss branched coverings -- one way or the other -- between surfaces of section for the Hopf flow and those for any other Seifert fibration of the 3-sph
Externí odkaz:
http://arxiv.org/abs/2102.08142
Publikováno v:
Arch. Math. (Basel) 117 (2021), 227-231
We show that if the complement of a Donaldson hypersurface in a closed, integral symplectic manifold has the homology of a subcritical Stein manifold, then the hypersurface is of degree one. In particular, this demonstrates a conjecture by Biran and
Externí odkaz:
http://arxiv.org/abs/2101.02068
Autor:
Geiges, Hansjörg, Lange, Christian
Publikováno v:
Abh. Math. Semin. Univ. Hambg. 91 (2021), 145-150
We classify the Seifert fibrations of lens spaces where the base orbifold is non-orientable. This is an addendum to our earlier paper `Seifert fibrations of lens spaces'. We correct Lemma 4.1 of that paper and fill the gap in the classification that
Externí odkaz:
http://arxiv.org/abs/2009.08767
Autor:
Geiges, Hansjörg
Publikováno v:
J. Fixed Point Theory Appl. 24 (2022), Paper No. 23
This note provides an affirmative answer to a question of Viterbo concerning the existence of nondiffeomorphic contact forms that share the same Reeb vector field. Starting from an observation by Croke-Kleiner and Abbondandolo that such contact forms
Externí odkaz:
http://arxiv.org/abs/2003.06270