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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: 46 Publications since 1984
3 Contributions as Editor
Biographic References: 1 Publication
Co-Authors: 22 Co-Authors with 45 Joint Publications
369 Co-Co-Authors

Publications by Year

Citations contained in zbMATH Open

42 Publications have been cited 533 times in 303 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
Isoperimetric control of the Steklov spectrum. Zbl 1235.58020
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
40
2011
Extremal eigenvalues of the Laplacian in a conformal class of metrics: the ‘conformal spectrum’. Zbl 1036.58026
Colbois, Bruno; El Soufi, Ahmad
38
2003
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.
37
1992
Riemannian manifolds admitting isometric immersions by their first eigenfunctions. Zbl 1030.53043
El Soufi, Ahmad; Ilias, Saïd
35
2000
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
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
30
2006
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.
30
2007
Laplacian eigenvalue functionals and metric deformations on compact manifolds. Zbl 1137.49040
El Soufi, Ahmad; Ilias, Saïd
27
2008
Domain deformations and eigenvalues of the Dirichlet Laplacian in a Riemannian manifold. Zbl 1124.49035
El Soufi, Ahmad; Ilias, Saïd
22
2007
Second eigenvalue of Schrödinger operators and mean curvature. Zbl 0955.58025
El Soufi, Ahmad; Ilias, Saïd
18
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
15
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
14
1993
Isoperimetric control of the spectrum of a compact hypersurface. Zbl 1282.58017
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
13
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
11
2010
Extremal first Dirichlet eigenvalue of doubly connected plane domains and dihedral symmetry. Zbl 1156.35068
El Soufi, Ahmad; Kiwan, Rola
10
2007
Eigenvalues of the Laplacian on a compact manifold with density. Zbl 1317.58031
Colbois, Bruno; El Soufi, Ahmad; Savo, Alessandro
9
2015
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 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
Where to place a spherical obstacle so as to maximize the second Dirichlet eigenvalue. Zbl 1157.35441
El Soufi, Ahmad; Kiwan, Rola
6
2008
Compact manifolds with fixed boundary and large Steklov eigenvalues. Zbl 1483.58007
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
6
2019
On sums of eigenvalues of elliptic operators on manifolds. Zbl 1382.58023
El Soufi, Ahmad; Harrell, Evans M. II; Ilias, Saïd; Stubbe, Joachim
5
2017
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
A lower bound on the spectrum of the Sublaplacian. Zbl 1322.53076
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad
4
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
4
2016
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
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
Critical metrics of the trace of the heat kernel on a compact manifold. Zbl 1037.58010
El Soufi, Ahmad; Ilias, Saïd
3
2002
Critical potentials of the eigenvalues and eigenvalue gaps of Schrödinger operators. Zbl 1081.58022
El Soufi, Ahmad; Moukadem, Nazih
3
2006
Spectrum of the Laplacian with weights. Zbl 1408.35105
Colbois, Bruno; El Soufi, Ahmad
3
2019
On the continuity of the eigenvalues of a sublaplacian. Zbl 1286.32018
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad
3
2014
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
Some remarks on Witten’s method. Poincaré-Hopf theorem and Atiyah-Bott formula. Zbl 0657.58040
El Soufi, A.; Wang, X. P.
2
1987
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
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
Numerical computation of the first eigenvalue of the \(p\)-Laplace operator on the unit sphere. Zbl 1268.65148
El Soufi, A.; Jazar, M.; Azari, H.
1
2012
Compact manifolds with fixed boundary and large Steklov eigenvalues. Zbl 1483.58007
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
6
2019
Spectrum of the Laplacian with weights. Zbl 1408.35105
Colbois, Bruno; El Soufi, Ahmad
3
2019
On sums of eigenvalues of elliptic operators on manifolds. Zbl 1382.58023
El Soufi, Ahmad; Harrell, Evans M. II; Ilias, Saïd; Stubbe, Joachim
5
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
4
2016
Eigenvalues of the Laplacian on a compact manifold with density. Zbl 1317.58031
Colbois, Bruno; El Soufi, Ahmad; Savo, Alessandro
9
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
13
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
Numerical computation of the first eigenvalue of the \(p\)-Laplace operator on the unit sphere. Zbl 1268.65148
El Soufi, A.; Jazar, M.; Azari, H.
1
2012
Isoperimetric control of the Steklov spectrum. Zbl 1235.58020
Colbois, Bruno; El Soufi, Ahmad; Girouard, Alexandre
40
2011
Bounding the eigenvalues of the Laplace-Beltrami operator on compact submanifolds. Zbl 1187.58027
Colbois, Bruno; Dryden, Emily B.; El Soufi, Ahmad
11
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
27
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
6
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.
30
2007
Domain deformations and eigenvalues of the Dirichlet Laplacian in a Riemannian manifold. Zbl 1124.49035
El Soufi, Ahmad; Ilias, Saïd
22
2007
Extremal first Dirichlet eigenvalue of doubly connected plane domains and dihedral symmetry. Zbl 1156.35068
El Soufi, Ahmad; Kiwan, Rola
10
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
30
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
38
2003
Extremal metrics for the first eigenvalue of the Laplacian in a conformal class. Zbl 1027.58010
El Soufi, Ahmad; Ilias, Saïd
15
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
35
2000
Second eigenvalue of Schrödinger operators and mean curvature. Zbl 0955.58025
El Soufi, Ahmad; Ilias, Saïd
18
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
14
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.
37
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 315 Authors

20 El Soufi, Ahmad
15 Colbois, Bruno
13 Girouard, Alexandre
9 Karpukhin, Mikhail A.
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 Sicbaldi, Pieralberto
6 Wang, Qiaoling
5 Gittins, Katie
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 Hassannezhad, Asma
4 Huang, Guangyue
4 Jammes, Pierre
4 Kokarev, Gerasim
4 Laugesen, Richard Snyder
4 Matthiesen, Henrik
4 Polterovich, Iosif
4 Provenzano, Luigi
4 Stubbe, Joachim
4 Sun, Hejun
4 Wang, Xiaoliu
4 Yu, Chengjie
3 Aithal, A. R.
3 Ali, Akram
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 Lagacé, Jean
3 Makhoul, Ola
3 Nadirashvili, Nikolai S.
3 Osting, Braxton
3 Petrides, Romain
3 Qi, Xuerong
3 Qu, Chengyuan
3 Ros, Antonio
3 Roth, Julien
3 Savo, Alessandro
3 Xu, Guangyu
2 Ali, Rifaqat
2 Alkhaldi, Ali H.
2 Ariturk, Sinan
2 Benalili, Mohammed
2 Benallal, Hafida
2 Bourgoin, Jean-Christophe
2 Chaves Brasil Junior, Aldir
2 Buoso, Davide
2 Canzani, Yaiza
2 Chen, Hang
2 Chiang, Yuanjen
2 Chorwadwala, Anisa M. H.
2 Cianci, Donato
2 do Carmo, Manfredo Perdigão
2 Domingo-Juan, M. Carmen
2 Fall, Mouhamed Moustapha
2 Ghigi, Alessandro
2 Han, Yuzhu
2 Harlim, John
2 Henrot, Antoine
2 Ho, Pak Tung
2 Ichikawa, Takamichi
2 Kiwan, Rola
2 Lamboley, Jimmy
2 Laptev, Ari
2 Li, Haizhong
2 Luzzini, Paolo
2 Mametsuka, Shinji
2 Mao, Jing
2 Marrocos, Marcus A. M.
2 Métras, Antoine
2 Miquel, Vicente
2 Niculescu, Constantin P.
2 Oudet, Edouard
2 Pérez-Ayala, Samuel
2 Ratto, Andrea
2 Roventa, Ionel
2 Sabourau, Stéphane
2 Sher, David A.
2 Shi, Yongjie
2 Siffert, Anna
2 Siudeja, Bartłomiej Andrzej
...and 215 more Authors
all top 5

Cited in 104 Serials

26 The Journal of Geometric Analysis
16 Calculus of Variations and Partial Differential Equations
12 Annals of Global Analysis and Geometry
11 Journal of Mathematical Analysis and Applications
11 Proceedings of the American Mathematical Society
9 Differential Geometry and its Applications
8 Journal of Functional Analysis
8 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods
8 Transactions of the American Mathematical Society
7 Mathematische Zeitschrift
7 Journal of Spectral Theory
6 Advances in Mathematics
6 Journal of Differential Equations
6 Geometric and Functional Analysis. GAFA
5 Journal of Geometry and Physics
5 Manuscripta Mathematica
5 Mathematische Annalen
4 Computers & Mathematics with Applications
4 Compositio Mathematica
4 Inventiones Mathematicae
4 Mathematische Nachrichten
4 Annales de l’Institut Henri Poincaré. Analyse Non Linéaire
4 International Journal of Mathematics
4 SIAM Journal on Mathematical Analysis
4 Comptes Rendus. Mathématique. Académie des Sciences, Paris
3 Journal of Mathematical Physics
3 Annales de l’Institut Fourier
3 Geometriae Dedicata
3 Potential Analysis
3 European Series in Applied and Industrial Mathematics (ESAIM): Control, Optimization and Calculus of Variations
3 Mediterranean Journal of Mathematics
2 Applicable Analysis
2 Archive for Rational Mechanics and Analysis
2 Communications in Mathematical Physics
2 ZAMP. Zeitschrift für angewandte Mathematik und Physik
2 Annali di Matematica Pura ed Applicata. Serie Quarta
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 Discrete and Continuous Dynamical Systems
2 Acta Mathematica Sinica. English Series
2 Boundary Value Problems
2 SIGMA. Symmetry, Integrability and Geometry: Methods and Applications
2 Complex Analysis and Operator Theory
2 Journal of Topology and Analysis
1 Indian Journal of Pure & Applied Mathematics
1 Inverse Problems
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 Bulletin of the London Mathematical Society
1 Canadian Mathematical Bulletin
1 Duke Mathematical Journal
1 Glasgow Mathematical Journal
1 Indiana University Mathematics 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 Physica D
1 Revista Matemática Iberoamericana
1 Journal of the Ramanujan Mathematical Society
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 Filomat
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 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
...and 4 more Serials

Citations by Year