×

zbMATH — the first resource for mathematics

El Soufi, Ahmad

Compute Distance To:
Author ID: el-soufi.ahmad Recent zbMATH articles by "El Soufi, Ahmad"
Published as: El Soufi, Ahmad; El Soufi, A.
Homepage: http://www.lmpt.univ-tours.fr/~elsoufi/
External Links: MGP · ResearchGate · dblp
Documents Indexed: 49 Publications since 1984, including 3 Books
Biographic References: 1 Publication

Publications by Year

Citations contained in zbMATH Open

40 Publications have been cited 472 times in 267 Documents Cited by Year
Immersions minimales, première valeur propre du laplacien et volume conforme. (Minimal immersions, first eigenvalue of the Laplacian and conformal volume). Zbl 0675.53045
El Soufi, A.; Ilias, S.
41
1986
An inequality of “Reilly”-type for submanifolds of the hyperbolic space. (Une inégalité du type ”Reilly” pour les sous-variétés de l’espace hyperbolique.) Zbl 0758.53029
El Soufi, A.; Ilias, S.
35
1992
Riemannian manifolds admitting isometric immersions by their first eigenfunctions. Zbl 1030.53043
El Soufi, Ahmad; Ilias, Saïd
33
2000
Extremal eigenvalues of the Laplacian in a conformal class of metrics: the ‘conformal spectrum’. Zbl 1036.58026
Colbois, Bruno; El Soufi, Ahmad
33
2003
Universal inequalities for the eigenvalues of Laplace and Schrödinger operators on submanifolds. Zbl 1162.58009
El Soufi, Ahmad; Harrell, Evans M. II; Ilias, Saïd
33
2009
Isoperimetric control of the Steklov spectrum. Zbl 1235.58020
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
29
2011
A Gamma-convergence argument for the blow-up of a non-local semilinear parabolic equation with Neumann boundary conditions. Zbl 1112.35108
El Soufi, A.; Jazar, M.; Monneau, R.
29
2007
Laplacian eigenvalue functionals and metric deformations on compact manifolds. Zbl 1137.49040
El Soufi, Ahmad; Ilias, Saïd
25
2008
A unique extremal metric for the least eigenvalue of the Laplacian on the Klein bottle. Zbl 1109.58029
El Soufi, Ahmad; Giacomini, Hector; Jazar, Mustapha
25
2006
Domain deformations and eigenvalues of the Dirichlet Laplacian in a Riemannian manifold. Zbl 1124.49035
El Soufi, Ahmad; Ilias, Saïd
18
2007
Second eigenvalue of Schrödinger operators and mean curvature. Zbl 0955.58025
El Soufi, Ahmad; Ilias, Saïd
16
2000
Upper bound for the second eigenvalue of a Schrödinger operator on a compact manifold and applications. (Majoration de la seconde valeur propre d’un opérateur de Schrödinger sur une variété compacte et applications.) Zbl 0766.58055
El Soufi, A.; Ilias, S.
15
1992
Extremal metrics for the first eigenvalue of the Laplacian in a conformal class. Zbl 1027.58010
El Soufi, Ahmad; Ilias, Saïd
13
2003
Harmonic mappings minimal immersions and conformal transformations of the sphere. (Applications harmoniques, immersions minimales et transformations conformes de la sphère.) Zbl 0777.58010
El Soufi, Ahmad
12
1993
Isoperimetric control of the spectrum of a compact hypersurface. Zbl 1282.58017
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
11
2013
Extremal eigenvalues of the Laplacian on Euclidean domains and closed surfaces. Zbl 1301.35063
Colbois, Bruno; El Soufi, Ahmad
11
2014
Bounding the eigenvalues of the Laplace-Beltrami operator on compact submanifolds. Zbl 1187.58027
Colbois, Bruno; Dryden, Emily B.; El Soufi, Ahmad
10
2010
Extremal first Dirichlet eigenvalue of doubly connected plane domains and dihedral symmetry. Zbl 1156.35068
El Soufi, Ahmad; Kiwan, Rola
7
2007
Conformal volume and its applications according to Li and Yau. (Le volume conforme et ses applications d’après Li et Yau.) Zbl 0757.53028
El Soufi, A.; Ilias, S.
7
1984
Eigenvalues of the Laplacian on a compact manifold with density. Zbl 1317.58031
Colbois, Bruno; El Soufi, Ahmad; Savo, Alessandro
6
2015
Eigenvalues of the Laplacian acting on \(p\)-forms and metric conformal deformations. Zbl 1095.35013
Colbois, Bruno; El Soufi, Ahmad
6
2006
Extremal \(G\)-invariant eigenvalues of the Laplacian of \(G\)-invariant metrics. Zbl 1127.58026
Colbois, Bruno; Dryden, Emily B.; El Soufi, Ahmad
6
2008
Morse index of \(p\)-harmonic maps. (Indice de Morse des applications \(p\)-harmoniques.) Zbl 0853.58037
El Soufi, Ahmad; Jeune, Albert
5
1996
Indice de Morse des applications \(p\)-harmoniques. (Morse index of \(p\)- harmonic maps). Zbl 0769.58011
El Soufi, Ahmad; Jeune, Albert
4
1992
Morse index of harmonic maps of the sphere. (Indice de Morse des applications harmoniques de la sphère.) Zbl 0924.58012
El Soufi, Ahmad
4
1995
A lower bound on the spectrum of the Sublaplacian. Zbl 1322.53076
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad
4
2015
Where to place a spherical obstacle so as to maximize the second Dirichlet eigenvalue. Zbl 1157.35441
El Soufi, Ahmad; Kiwan, Rola
4
2008
Inequalities and bounds for the eigenvalues of the sub-Laplacian on a strictly pseudoconvex CR manifold. Zbl 1269.32021
Aribi, Amine; El Soufi, Ahmad
4
2013
On sums of eigenvalues of elliptic operators on manifolds. Zbl 1382.58023
El Soufi, Ahmad; Harrell, Evans M. II; Ilias, Saïd; Stubbe, Joachim
4
2017
On the continuity of the eigenvalues of a sublaplacian. Zbl 1286.32018
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad
3
2014
Critical potentials of the eigenvalues and eigenvalue gaps of Schrödinger operators. Zbl 1081.58022
El Soufi, Ahmad; Moukadem, Nazih
3
2006
Critical metrics of the trace of the heat kernel on a compact manifold. Zbl 1037.58010
El Soufi, Ahmad; Ilias, Saïd
3
2002
Eigenvalues of the sub-Laplacian and deformations of contact structures on a compact CR manifold. Zbl 1320.32042
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad
2
2015
On the placement of an obstacle so as to optimize the Dirichlet heat trace. Zbl 1339.35200
El Soufi, Ahmad; Harrell, Evans M. II
2
2016
Some remarks on Witten’s method. Poincaré-Hopf theorem and Atiyah-Bott formula. Zbl 0657.58040
El Soufi, A.; Wang, X. P.
2
1987
On the first eigenvalue of tori. (Sur la première valeur propre des tores.) Zbl 0902.58003
El Soufi, Ahmad; Ilias, Saïd; Ros, Antonio
2
1997
\(p\)-harmonic diffeomorphisms. Zbl 0908.58006
El Soufi, A.; Sandier, E.
2
1998
Immersions minimales et immersions pluriharmoniques entre variétés riemanniennes: résultats de non existence et de rigidité. (Minimal and pluriharmonic immersions between Riemannian manifolds: non-existence and rigidity results). Zbl 0945.53038
El Soufi, Ahmad; Petit, Robert
1
2000
Harmonic maps, pluriharmonic maps and existence of non-trivial parallel 2-forms. (Applications harmoniques, applications pluriharmoniques et existence de 2-formes parallèles non nulles.) Zbl 0901.58012
El Soufi, Ahmad; Petit, Robert
1
1998
Spectrum of the Laplacian with weights. Zbl 1408.35105
Colbois, Bruno; El Soufi, Ahmad
1
2019
Spectrum of the Laplacian with weights. Zbl 1408.35105
Colbois, Bruno; El Soufi, Ahmad
1
2019
On sums of eigenvalues of elliptic operators on manifolds. Zbl 1382.58023
El Soufi, Ahmad; Harrell, Evans M. II; Ilias, Saïd; Stubbe, Joachim
4
2017
On the placement of an obstacle so as to optimize the Dirichlet heat trace. Zbl 1339.35200
El Soufi, Ahmad; Harrell, Evans M. II
2
2016
Eigenvalues of the Laplacian on a compact manifold with density. Zbl 1317.58031
Colbois, Bruno; El Soufi, Ahmad; Savo, Alessandro
6
2015
A lower bound on the spectrum of the Sublaplacian. Zbl 1322.53076
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad
4
2015
Eigenvalues of the sub-Laplacian and deformations of contact structures on a compact CR manifold. Zbl 1320.32042
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad
2
2015
Extremal eigenvalues of the Laplacian on Euclidean domains and closed surfaces. Zbl 1301.35063
Colbois, Bruno; El Soufi, Ahmad
11
2014
On the continuity of the eigenvalues of a sublaplacian. Zbl 1286.32018
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad
3
2014
Isoperimetric control of the spectrum of a compact hypersurface. Zbl 1282.58017
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
11
2013
Inequalities and bounds for the eigenvalues of the sub-Laplacian on a strictly pseudoconvex CR manifold. Zbl 1269.32021
Aribi, Amine; El Soufi, Ahmad
4
2013
Isoperimetric control of the Steklov spectrum. Zbl 1235.58020
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
29
2011
Bounding the eigenvalues of the Laplace-Beltrami operator on compact submanifolds. Zbl 1187.58027
Colbois, Bruno; Dryden, Emily B.; El Soufi, Ahmad
10
2010
Universal inequalities for the eigenvalues of Laplace and Schrödinger operators on submanifolds. Zbl 1162.58009
El Soufi, Ahmad; Harrell, Evans M. II; Ilias, Saïd
33
2009
Laplacian eigenvalue functionals and metric deformations on compact manifolds. Zbl 1137.49040
El Soufi, Ahmad; Ilias, Saïd
25
2008
Extremal \(G\)-invariant eigenvalues of the Laplacian of \(G\)-invariant metrics. Zbl 1127.58026
Colbois, Bruno; Dryden, Emily B.; El Soufi, Ahmad
6
2008
Where to place a spherical obstacle so as to maximize the second Dirichlet eigenvalue. Zbl 1157.35441
El Soufi, Ahmad; Kiwan, Rola
4
2008
A Gamma-convergence argument for the blow-up of a non-local semilinear parabolic equation with Neumann boundary conditions. Zbl 1112.35108
El Soufi, A.; Jazar, M.; Monneau, R.
29
2007
Domain deformations and eigenvalues of the Dirichlet Laplacian in a Riemannian manifold. Zbl 1124.49035
El Soufi, Ahmad; Ilias, Saïd
18
2007
Extremal first Dirichlet eigenvalue of doubly connected plane domains and dihedral symmetry. Zbl 1156.35068
El Soufi, Ahmad; Kiwan, Rola
7
2007
A unique extremal metric for the least eigenvalue of the Laplacian on the Klein bottle. Zbl 1109.58029
El Soufi, Ahmad; Giacomini, Hector; Jazar, Mustapha
25
2006
Eigenvalues of the Laplacian acting on \(p\)-forms and metric conformal deformations. Zbl 1095.35013
Colbois, Bruno; El Soufi, Ahmad
6
2006
Critical potentials of the eigenvalues and eigenvalue gaps of Schrödinger operators. Zbl 1081.58022
El Soufi, Ahmad; Moukadem, Nazih
3
2006
Extremal eigenvalues of the Laplacian in a conformal class of metrics: the ‘conformal spectrum’. Zbl 1036.58026
Colbois, Bruno; El Soufi, Ahmad
33
2003
Extremal metrics for the first eigenvalue of the Laplacian in a conformal class. Zbl 1027.58010
El Soufi, Ahmad; Ilias, Saïd
13
2003
Critical metrics of the trace of the heat kernel on a compact manifold. Zbl 1037.58010
El Soufi, Ahmad; Ilias, Saïd
3
2002
Riemannian manifolds admitting isometric immersions by their first eigenfunctions. Zbl 1030.53043
El Soufi, Ahmad; Ilias, Saïd
33
2000
Second eigenvalue of Schrödinger operators and mean curvature. Zbl 0955.58025
El Soufi, Ahmad; Ilias, Saïd
16
2000
Immersions minimales et immersions pluriharmoniques entre variétés riemanniennes: résultats de non existence et de rigidité. (Minimal and pluriharmonic immersions between Riemannian manifolds: non-existence and rigidity results). Zbl 0945.53038
El Soufi, Ahmad; Petit, Robert
1
2000
\(p\)-harmonic diffeomorphisms. Zbl 0908.58006
El Soufi, A.; Sandier, E.
2
1998
Harmonic maps, pluriharmonic maps and existence of non-trivial parallel 2-forms. (Applications harmoniques, applications pluriharmoniques et existence de 2-formes parallèles non nulles.) Zbl 0901.58012
El Soufi, Ahmad; Petit, Robert
1
1998
On the first eigenvalue of tori. (Sur la première valeur propre des tores.) Zbl 0902.58003
El Soufi, Ahmad; Ilias, Saïd; Ros, Antonio
2
1997
Morse index of \(p\)-harmonic maps. (Indice de Morse des applications \(p\)-harmoniques.) Zbl 0853.58037
El Soufi, Ahmad; Jeune, Albert
5
1996
Morse index of harmonic maps of the sphere. (Indice de Morse des applications harmoniques de la sphère.) Zbl 0924.58012
El Soufi, Ahmad
4
1995
Harmonic mappings minimal immersions and conformal transformations of the sphere. (Applications harmoniques, immersions minimales et transformations conformes de la sphère.) Zbl 0777.58010
El Soufi, Ahmad
12
1993
An inequality of “Reilly”-type for submanifolds of the hyperbolic space. (Une inégalité du type ”Reilly” pour les sous-variétés de l’espace hyperbolique.) Zbl 0758.53029
El Soufi, A.; Ilias, S.
35
1992
Upper bound for the second eigenvalue of a Schrödinger operator on a compact manifold and applications. (Majoration de la seconde valeur propre d’un opérateur de Schrödinger sur une variété compacte et applications.) Zbl 0766.58055
El Soufi, A.; Ilias, S.
15
1992
Indice de Morse des applications \(p\)-harmoniques. (Morse index of \(p\)- harmonic maps). Zbl 0769.58011
El Soufi, Ahmad; Jeune, Albert
4
1992
Some remarks on Witten’s method. Poincaré-Hopf theorem and Atiyah-Bott formula. Zbl 0657.58040
El Soufi, A.; Wang, X. P.
2
1987
Immersions minimales, première valeur propre du laplacien et volume conforme. (Minimal immersions, first eigenvalue of the Laplacian and conformal volume). Zbl 0675.53045
El Soufi, A.; Ilias, S.
41
1986
Conformal volume and its applications according to Li and Yau. (Le volume conforme et ses applications d’après Li et Yau.) Zbl 0757.53028
El Soufi, A.; Ilias, S.
7
1984
all top 5

Cited by 271 Authors

20 El Soufi, Ahmad
12 Colbois, Bruno
10 Girouard, Alexandre
8 Ilias, Saïd
8 Zhou, Jun
7 Xia, Changyu
6 Cheng, Qingming
6 Fraser, Ailana M.
6 Freitas, Pedro
6 Harrell, Evans M. II
6 Karpukhin, Mikhail A.
6 Sicbaldi, Pieralberto
6 Wang, Qiaoling
5 Grosjean, Jean-François
5 Penskoi, Alexei V.
5 Schoen, Richard Melvin
4 Bogoşel, Beniamin
4 Bucur, Dorin
4 Chen, Daguang
4 Du, Feng
4 Gittins, Katie
4 Hassannezhad, Asma
4 Huang, Guangyue
4 Jammes, Pierre
4 Kokarev, Gerasim
4 Polterovich, Iosif
4 Sun, Hejun
4 Wang, Xiaoliu
4 Yu, Chengjie
3 Alías, Luis J.
3 Antunes, Pedro Ricardo Simão
3 Aribi, Amine
3 Ding, Juntang
3 Dragomir, Sorin
3 Fardoun, Ali
3 Gao, Wenjie
3 Ginoux, Nicolas
3 Gomes, José Nazareno Vieira
3 Hou, Songbo
3 Jakobson, Dmitry
3 Kao, Chiu-Yen
3 Laugesen, Richard Snyder
3 Makhoul, Ola
3 Matthiesen, Henrik
3 Nadirashvili, Nikolai S.
3 Osting, Braxton
3 Petrides, Romain
3 Qi, Xuerong
3 Qu, Chengyuan
3 Ros, Antonio
3 Roth, Julien
3 Stubbe, Joachim
3 Xu, Guangyu
2 Aithal, A. R.
2 Ariturk, Sinan
2 Benalili, Mohammed
2 Benallal, Hafida
2 Bourgoin, Jean-Christophe
2 Chaves Brasil Junior, Aldir
2 Canzani, Yaiza
2 Chen, Hang
2 Chiang, Yuanjen
2 Cianci, Donato
2 do Carmo, Manfredo Perdigão
2 Domingo-Juan, M. Carmen
2 Fall, Mouhamed Moustapha
2 Ghigi, Alessandro
2 Han, Yuzhu
2 Henrot, Antoine
2 Ho, Pak Tung
2 Ichikawa, Takamichi
2 Kiwan, Rola
2 Lamboley, Jimmy
2 Laptev, Ari
2 Li, Haizhong
2 Mametsuka, Shinji
2 Mao, Jing
2 Marrocos, Marcus A. M.
2 Miquel, Vicente
2 Niculescu, Constantin P.
2 Oudet, Edouard
2 Provenzano, Luigi
2 Ratto, Andrea
2 Roventa, Ionel
2 Sabourau, Stéphane
2 Savo, Alessandro
2 Sher, David A.
2 Shi, Yongjie
2 Siudeja, Bartłomiej Andrzej
2 van den Berg, Michiel
2 Wang, Hengling
2 Wang, Xianfeng
2 Weth, Tobias
2 Wu, Chuanxi
2 Xiong, Changwei
2 Yang, Hongcang
2 Zhu, Jonathan J. H.
1 Akhmetgaliyev, Eldar
1 Al Sayed, Abdelkader
1 Alencar, Hilário
...and 171 more Authors
all top 5

Cited in 98 Serials

16 The Journal of Geometric Analysis
14 Calculus of Variations and Partial Differential Equations
11 Proceedings of the American Mathematical Society
11 Annals of Global Analysis and Geometry
10 Journal of Mathematical Analysis and Applications
8 Transactions of the American Mathematical Society
8 Differential Geometry and its Applications
7 Journal of Functional Analysis
7 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods
6 Advances in Mathematics
6 Journal of Differential Equations
6 Mathematische Zeitschrift
5 Journal of Geometry and Physics
5 Manuscripta Mathematica
5 Mathematische Annalen
5 Geometric and Functional Analysis. GAFA
5 Journal of Spectral Theory
4 Computers & Mathematics with Applications
4 Compositio Mathematica
4 Mathematische Nachrichten
4 Annales de l’Institut Henri Poincaré. Analyse Non Linéaire
4 Comptes Rendus. Mathématique. Académie des Sciences, Paris
3 Annales de l’Institut Fourier
3 Geometriae Dedicata
3 Inventiones Mathematicae
3 International Journal of Mathematics
3 SIAM Journal on Mathematical Analysis
3 Mediterranean Journal of Mathematics
2 Archive for Rational Mechanics and Analysis
2 Communications in Mathematical Physics
2 Journal of Mathematical Physics
2 ZAMP. Zeitschrift für angewandte Mathematik und Physik
2 Applied Mathematics and Optimization
2 Archiv der Mathematik
2 Journal of Differential Geometry
2 Journal of the Mathematical Society of Japan
2 Journal of Optimization Theory and Applications
2 Monatshefte für Mathematik
2 SIAM Journal on Control and Optimization
2 Applied Mathematics Letters
2 Annales de la Faculté des Sciences de Toulouse. Mathématiques. Série VI
2 Potential Analysis
2 Discrete and Continuous Dynamical Systems
2 European Series in Applied and Industrial Mathematics (ESAIM): Control, Optimization and Calculus of Variations
2 Acta Mathematica Sinica. English Series
2 SIGMA. Symmetry, Integrability and Geometry: Methods and Applications
2 Complex Analysis and Operator Theory
2 Journal of Topology and Analysis
1 Applicable Analysis
1 Indian Journal of Pure & Applied Mathematics
1 Journal of Statistical Physics
1 Mathematical Methods in the Applied Sciences
1 Mathematical Notes
1 Mathematical Proceedings of the Cambridge Philosophical Society
1 Anais da Academia Brasileira de Ciências
1 Annali di Matematica Pura ed Applicata. Serie Quarta
1 Bulletin of the London Mathematical Society
1 Canadian Mathematical Bulletin
1 Duke Mathematical Journal
1 Glasgow Mathematical Journal
1 Publications Mathématiques
1 Integral Equations and Operator Theory
1 Journal of Geometry
1 Mathematika
1 Michigan Mathematical Journal
1 Pacific Journal of Mathematics
1 Proceedings of the London Mathematical Society. Third Series
1 Ricerche di Matematica
1 Tohoku Mathematical Journal. Second Series
1 Revista Matemática Iberoamericana
1 European Journal of Applied Mathematics
1 Communications in Partial Differential Equations
1 Journal de Mathématiques Pures et Appliquées. Neuvième Série
1 Proceedings of the Royal Society of Edinburgh. Section A. Mathematics
1 Proceedings of the Indian Academy of Sciences. Mathematical Sciences
1 Boletim da Sociedade Brasileira de Matemática. Nova Série
1 The Journal of Analysis
1 NoDEA. Nonlinear Differential Equations and Applications
1 Doklady Mathematics
1 Abstract and Applied Analysis
1 Journal of Inequalities and Applications
1 Geometry & Topology
1 Discrete Dynamics in Nature and Society
1 Journal of Dynamical and Control Systems
1 Communications in Contemporary Mathematics
1 Lobachevskii Journal of Mathematics
1 Nonlinear Analysis. Real World Applications
1 Communications on Pure and Applied Analysis
1 Bulletin of the Brazilian Mathematical Society. New Series
1 Boundary Value Problems
1 Proceedings of the Steklov Institute of Mathematics
1 Frontiers of Mathematics in China
1 Advances in Calculus of Variations
1 Communications in Mathematics
1 Advances in Nonlinear Analysis
1 EMS Surveys in Mathematical Sciences
1 European Journal of Mathematics
1 Geometric Flows

Citations by Year