118,219 research outputs found
Bounded extremal problems in Hardy spaces for the conjugate Beltrami equation in simply-connected domains
No full textTechniques of constrained approximation are used to recover solutions to elliptic partial
differential equations from incomplete and corrupted boundary data. The approach involves
constructive computations in generalized Hardy spaces of functions whose real and
imaginary parts are related by formulae similar to the Cauchy–Riemann equations: these
spaces were recently introduced by Baratchart, Leblond, Rigat and Russ. A prime motivation
for this research is the modeling of plasma confinement in a tokamak reactor. Constructive
and numerical aspects are also discussed in detail
À l'assaut des pays nègres : journal des missionnaires d'Alger dans l'Afrique équatoriale.
No full text"Au lecteur" signed: G. L. (i. e. Georges Leblond)Mode of access: Internet
C'est un locataire : chanson créée par Henriette Leblond, Darcet, Elvell, Cottin (4 artistes) [photo de Henriette Leblond non-créditée] [illustration monogramme H.V. pour H. Viollet]
No full textC'est un locataire : chanson créée par Henriette Leblond à l’Alhambra, Darcet au Petit Casino, Elvell, Cottin [Pierre Cottin] (4 artistes) ; (dédicace) “A nos camarades Paulette Mons, Delly-Mô, L. Destrée, J. Delorme [Jane Delorme], Sarthel, Harryso, L. Cotté” (7 artistes) ; illustration monogramme H.V. pour H. Viollet (série HV Viollet Bénech médaillon) ; photo de Henriette Leblond non-créditée ; paroles de F.L. Bénech ; musique de V. Scotto [Vincent Scotto] ; Les chansons de L. Bénech, auteur, 37 Faubourg Saint-Denis, Paris ; © sans date ; imprimerie Crevel ; (tampon) “Dépôt & vente/chez/Louis Tournayre” ; [intérieur : “chansonnette” ; aucune (dédicace, artiste) ; ©1909 ; cotage LBP110 ; Mlle Bertrand gravure ; imprimerie Crevel] ; verso catalogue (33 titres - 1910) ; incipit “L’autr’ jour sortant pour m’ prom’ner” ; refrain “C’est un locataire / Qui est en train d’emménager” ; datation (titre) 1909 par © ; exemplaire 1910 par catalogue. [notice mise à jour 14/04/2017
C'est un locataire : chanson créée par Henriette Leblond, Darcet, Elvell, Cottin (4 artistes) [photo de Henriette Leblond non-créditée] [illustration monogramme H.V. pour H. Viollet]
No full textC'est un locataire : chanson créée par Henriette Leblond à l’Alhambra, Darcet au Petit Casino, Elvell, Cottin (4 artistes) ; (dédicace) “A nos camarades Paulette Mons, Delly-Mô, L. Destrée, J. Delorme [Jane Delorme], Sarthel, Harryso, L. Cotté” (7 artistes) ; illustration monogramme H.V. pour H. Viollet (série HV Viollet Bénech médaillon) ; photo de Henriette Leblond non-créditée ; paroles de F.L. Bénech ; musique de V. Scotto ; Les chansons de L. Bénech, auteur, 37 Faubourg Saint-Denis, Paris ; © sans date ; imprimerie Crevel ; (tampon) “Dépôt & vente/chez/Louis Tournayre” ; [intérieur : “chansonnette” ; aucune (dédicace, artiste) ; ©1909 ; cotage LBP110 ; Mlle Bertrand gravure ; imprimerie Crevel] ; verso catalogue (33 titres - 1910) ; incipit “L’autr’ jour sortant pour m’ prom’ner” ; refrain “C’est un locataire / Qui est en train d’emménager” ; datation (titre) 1909 par © ; exemplaire 1910 par catalogue. [notice mise à jour 14/04/2017
On fractional semidiscrete Dirac operators of L\'evy-Leblond type
No full textIn this paper we introduce a wide class of space-fractional and
time-fractional semidiscrete Dirac operators of L\'evy-Leblond type on the
semidiscrete space-time lattice (),
resembling to fractional semidiscrete counterparts of the so-called parabolic
Dirac operators. The methods adopted here are fairly operational, relying
mostly on the algebraic manipulations involving Clifford algebras, discrete
Fourier analysis techniques as well as standard properties of the analytic
fractional semidiscrete semigroup
, carrying
the parameter constraints and . The results obtained involve the study of Cauchy problems on
.Comment: 30 pages, 3 figures; several typos were corrected; Section 5 was
expande
Generalized supersymmetry and Lévy-Leblond equation
No full textThe symmetries of the L\'evy-Leblond equation are investigated beyond the standard Lie framework.It is shown that the equation has two remarkable symmetries.One is given by the super Schr\"odinger algebra and the other is by a \ZZ graded Lie algebra.The \ZZ graded Lie algebra is achieved by transforming bosonic into fermionic operators in the super Schr\"odinger algebraand introducing second order differential operators as generators of symmetry
On the Lévy-Leblond-Newton equation and its symmetries: a geometric view
No full text24 pages, 2 figuresInternational audienceThe L\'evy-Leblond-Newton (LLN) equation for non-relativistic fermions with a gravitational self-interaction is reformulated within the framework of a Bargmann structure over a -dimensional Newton-Cartan (NC) spacetime. The Schr\"odinger-Newton (SN) group, introduced in [21] as the maximal group of invariance of the SN equation, turns out to be also the group of conformal Bargmann automorphisms preserving the coupled L\'evy-Leblond and NC gravitational field equations. Within the Bargmann geometry a generalization of the LLN equation is provided as well. The canonical projective unitary representation of the SN group on 4-component spinors is also presented. In particular, when restricted to dilations, the value of the dynamical exponent is recovered as previously derived in [21] for the SN equation. Subsequently, conserved quantities associated to the (generalized) LLN equation are also exhibited
A πάρεργα und παραλειπŏμενα of J-M. Lévy-Leblond ''On the Conceptual Nature of the Physical Constants''
No full textStarting, at first, from some little known but notable formal remarks made by the mathematician Gabriele Darbo about the qualitative dimensional analysis of the physical quantities, for then, above all, take into account some latest science education (d’après diSessa) and philosophy (d’après Gärdenfors) research results, it shall be possible, paraphrasing a celebrated 1851 work of Arthur Schopenhauer, work out a kind of Parerga und Paralipòmena of the basic J-M. Lévy-Leblond paper On the Conceptual Nature of the Physical Constants, published in Rivista del Nuovo Cimento in 1977. The epistemological reconnaissance thereof, might turn out to be of some usefulness in the physics education context as regard, for instance, the meaning of the physical constants, their values and possible further epistemological and pedagogical implications
Trial G. — Dix Ans de Chasses au Gabon. Préface de Tony Burnand, desins originaux de L. Blancou et H. Pain. Crépin-Leblond et Cie, éditeurs, Paris, 1955
No full textDechambre Edmond. Trial G. — Dix Ans de Chasses au Gabon. Préface de Tony Burnand, desins originaux de L. Blancou et H. Pain. Crépin-Leblond et Cie, éditeurs, Paris, 1955. In: La Terre et La Vie, Revue d'Histoire naturelle, tome 9, n°3, 1955. p. 206
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