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pro vyhledávání: '"Nicolas Popoff"'
Autor:
Nicolas Popoff, Jean-François Bony
Publikováno v:
Asymptotic Analysis
Asymptotic Analysis, IOS Press, 2019, 112 (1-2), pp.23-36. ⟨10.3233/ASY-181493⟩
Asymptotic Analysis, IOS Press, 2019, 112 (1-2), pp.23-36. ⟨10.3233/ASY-181493⟩
International audience
Autor:
Nicolas Popoff
Publikováno v:
Spectral Theory and Mathematical Physics ISBN: 9783030555559
In this article we review various results about the negative spectrum of the Laplacian with a mixed attractive Robin boundary condition.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48ad722e56ad73cb9ff8f72d04f19f54
https://doi.org/10.1007/978-3-030-55556-6_12
https://doi.org/10.1007/978-3-030-55556-6_12
Publikováno v:
Annales Henri Poincaré
Annales Henri Poincaré, Springer Verlag, 2020, 21 (2), pp.377-403. ⟨10.1007/s00023-019-00865-5⟩
Annales Henri Poincaré, Springer Verlag, 2020, 21 (2), pp.377-403. ⟨10.1007/s00023-019-00865-5⟩
We consider a three-dimensional waveguide that is a small deformation of a periodically twisted tube (including in particular the case of a straight tube). The deformation is given by a bending and an additional twisting of the tube, both parametrize
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fd90c7f095032956ce32dcd861ca0df
http://arxiv.org/abs/1903.10599
http://arxiv.org/abs/1903.10599
Publikováno v:
Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society, American Mathematical Society, 2018, 146 (11), pp.4801-4812. ⟨10.1090/proc/14141⟩
Proceedings of the American Mathematical Society, American Mathematical Society, 2018, 146 (11), pp.4801-4812. ⟨10.1090/proc/14141⟩
We consider the Dirichlet Laplacian in a straight three dimensional waveguide with non-rotationally invariant cross section, perturbed by a twisting of small amplitude. It is well known that such a perturbation does not create eigenvalues below the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91908dfdf8aca84602d79c5ec909c63f
https://hal.archives-ouvertes.fr/hal-02484377
https://hal.archives-ouvertes.fr/hal-02484377
This proceedings volume contains peer-reviewed, selected papers and surveys presented at the conference Spectral Theory and Mathematical Physics (STMP) 2018 which was held in Santiago, Chile, at the Pontifical Catholic University of Chile in Decemb
Autor:
Nicolas Merle, Laurent Delevoye, Frédéric Lefebvre, Carmen Claver, Kai Chung Szeto, Mostafa Taoufik, Cyril Godard, Jessica Llop Castelbou, Nicolas Popoff, Jean Raynaud, Wissam Sahyoun, Régis M. Gauvin
Publikováno v:
Catal. Sci. Technol.
Catal. Sci. Technol., 2016, Catal. Sci. Technol., 6, pp.882-889. ⟨10.1039/C5CY01372K⟩
Catalysis Science & Technology
Catalysis Science & Technology, 2016, 6 (3), pp.882-889. ⟨10.1039/C5CY01372K⟩
Catal. Sci. Technol., 2016, Catal. Sci. Technol., 6, pp.882-889. ⟨10.1039/C5CY01372K⟩
Catalysis Science & Technology
Catalysis Science & Technology, 2016, 6 (3), pp.882-889. ⟨10.1039/C5CY01372K⟩
Supported Lewis acid/base systems based on a triphenyl phosphine fragment and Piers' reagent (HB(C6F5)2) or BArF have been prepared and characterized. Both materials show unprecedented catalytic activity in the Z-selective hydrogenation of 3-hexyne t
Publikováno v:
Proceedings of the Royal Society of Edinburgh: Section A Mathematics
Proceedings of the Royal Society of Edinburgh: Section A Mathematics, Cambridge University Press (CUP), In press, pp.1-23. ⟨10.1017/prm.2019.48⟩
Proceedings of the Royal Society of Edinburgh: Section A Mathematics, Cambridge University Press (CUP), In press, pp.1-23. ⟨10.1017/prm.2019.48⟩
We consider the Robin Laplacian in the domains Ω and Ωε, ε > 0, with sharp and blunted cusps, respectively. Assuming that the Robin coefficient a is large enough, the spectrum of the problem in Ω is known to be residual and to cover the whole co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::986f9763ae75ead826e1a11991eee9ea
http://arxiv.org/abs/1809.10963
http://arxiv.org/abs/1809.10963
Autor:
Nicolas Popoff, Sergei A. Nazarov
Publikováno v:
Comptes Rendus. Mathématique
Comptes Rendus. Mathématique, Académie des sciences (Paris), 2018, 356 (9), pp.927-932. ⟨10.1016/j.crma.2018.07.001⟩
Comptes Rendus. Mathématique, Académie des sciences (Paris), 2018, 356 (9), pp.927-932. ⟨10.1016/j.crma.2018.07.001⟩
We study the Laplacian in a bounded domain, with a varying Robin boundary condition singular at one point. The associated quadratic form is not semi-bounded from below, and the corresponding Laplacian is not self-adjoint, it has a residual spectrum c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::317b5bbc705c0835cded68c3409063ce
Autor:
Nicolas Merle, Laurent Delevoye, Frédéric Lefebvre, Jeff Espinas, Jérémie D. A. Pelletier, Régis M. Gauvin, Nicolas Popoff, Jean Thivolle-Cazat, Mostafa Taoufik, Kai C. Szeto, Aimery De Mallmann
Publikováno v:
Catalysis Today. 235:41-48
We have developed a new hybrid material, featuring single-site phenolic functions on a silica surface. This new material was used for the grafting, by surface organometallic chemistry, of tungsten perhydrocarbyl and molybdenum bispyrrolide alkylidene
Autor:
Nicolas Popoff, Régis M. Gauvin, Mostafa Taoufik, Alessandra Quadrelli, Aimery De Mallmann, Kai C. Szeto, Nicolas Merle, Laurent Delevoye, Hong-Peng Jia, Björn Loges, Elise Berrier
Publikováno v:
Organometallics. 32:6452-6460
The molecular complex [V(═O)(Mes)3] (1) reacts with silica partially dehydroxylated at 700 °C (SiO2-700) to afford [(≡SiO)V(═O)(Mes)2] (2) as the major surface species, while a bis-grafted surface species [(≡SiO)2V(═O)(Mes)] (3) is obtaine