Results 11 to 20 of about 72 (57)
, 2022 International audienceIn the last decade, great interest in using microalgae for applications in several fields such as nutrition, cosmetic or sustainable chemicals manufacturing, e.g. plastic or pharmaceutical synthesis intermediates.
Krichen, Youssef +6 more
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Powersum formula for differential resolvents
International Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 7, Page 365-371, 2004., 2004 We will prove that we can specialize the indeterminate α in a linear differential α‐resolvent of a univariate polynomial over a differential field of characteristic zero to an integer q to obtain a q‐resolvent. We use this idea to obtain a formula, known as the powersum formula, for the terms of the α‐resolvent.
John Michael Nahay
wiley +1 more source
A partial factorization of the powersum formula
International Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 58, Page 3075-3101, 2004., 2004 For any univariate polynomial P whose coefficients lie in an ordinary differential field 𝔽 of characteristic zero, and for any constant indeterminate α, there exists a nonunique nonzero linear ordinary differential operator ℜ of finite order such that the αth power of each root of P is a solution of ℜzα = 0, and the coefficient functions of ℜ all lie ...
John Michael Nahay
wiley +1 more source
Differential resolvents of minimal order and weight
International Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 54, Page 2867-2893, 2004., 2004 We will determine the number of powers of α that appear with nonzero coefficient in an α‐power linear differential resolvent of smallest possible order of a univariate polynomial P(t) whose coefficients lie in an ordinary differential field and whose distinct roots are differentially independent over constants.
John Michael Nahay
wiley +1 more source
Powersum formula for polynomials whose distinct roots are differentially independent over constants
International Journal of Mathematics and Mathematical Sciences, Volume 32, Issue 12, Page 721-738, 2002., 2002 We prove that the author′s powersum formula yields a nonzero expression for a particular linear ordinary differential equation, called a resolvent, associated with a univariate polynomial whose coefficients lie in a differential field of characteristic zero provided the distinct roots of the polynomial are differentially independent over constants.
John Michael Nahay
wiley +1 more source
Multivariable dimension polynomials and new invariants of differential field extensions
International Journal of Mathematics and Mathematical Sciences, Volume 27, Issue 4, Page 201-214, 2001., 2001 We introduce a special type of reduction in the ring of differential polynomials and develop the appropriate technique of characteristic sets that allows to generalize the classical Kolchin′s theorem on differential dimension polynomial and find new differential birational invariants of a finitely generated differential field extension.
Alexander B. Levin
wiley +1 more source
Décider ensemble : ça s’apprend
, 2021 Par Laurent Reynaud et Tiphaine Beaslay, professeur.e.s au lycée Jacques Feyder d’Épinay sur Seine “ L’intelligence c’est la socialité intériorisée ” Henri Wallon CONSTAT Témoignage d’un instant de classe Mercredi, il est 12h05, la sonnerie va bientôt
REYNAUD Laurent
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, 2016 Fréquence protestante - Midi-Magazine - 12h05 © Jean-Manuel Simoes. Pour toute autre utilisation, contacter directement l'auteur :contact.simoes@gmail.com Laurence Arven avec Bernard Wallon et Jean-Manuel SIMOES, photographe.
hermes
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Journée d'études — "Marche et démarches"
, 2018 15 mai 2018, 9h30-17h, Théâtre du Soleil, Cartoucherie de Vincennes. Journée d'études organisée par le CIRRAS (Centre International de Réflexion et de Recherches sur les Arts du Spectacle), en partenariat avec l'IRHiS et avec le soutien de l'IUF Marche ...
irhis
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, 2017 Kent Archaeological Society propose une journée d'étude le samedi 4 novembre 2017 sur Archaeology of Medieval Kent. Programme de cette journée : Matin 10h-10h30 : Café 10h30-10h40 : Introduction par Geral Cramp, KAS president 10h40-11h20 : Throwley ...
Nordoc'Archéo
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