Results 11 to 20 of about 705 (40)

A Note on Schanuel's Conjectures for Exponential Logarithmic Power Series Fields

, 2012
In [1], J. Ax proved a transcendency theorem for certain differential fields of characteristic zero: the differential counterpart of the still open Schanuel's conjecture about the exponential function over the field of complex numbers [11, page 30].
Kuhlmann, Salma, Matusinski, Mickael, Shkop, Ahuva C.   +2 more
core   +3 more sources

Divergence-free polynomial derivations [PDF]

, 2017
In this paper we present some new and old properties of divergences and divergence-free ...
Nowicki, Andrzej
core   +1 more source

Algorithms yield upper bounds in differential algebra

, 2020
Consider an algorithm computing in a differential field with several commuting derivations such that the only operations it performs with the elements of the field are arithmetic operations, differentiation, and zero testing.
Li, Wei, Ovchinnikov, Alexey, Pogudin, Gleb, Scanlon, Thomas   +3 more
core   +2 more sources

Classical nonintegrability of a quantum chaotic SU(3) Hamiltonian system

, 2009
We prove nonintegrability of a model Hamiltonian system defined on the Lie algebra $\mathfrak{su}_3$ suitable for investigation of connections between classical and quantum characteristics of chaos.Comment: 17 ...
Adam Sawicki, Almeida, Audin, Bohigas, Crespo, Georgi, Gnutzmann, Gnutzmann, Guillemin, Gutzwiller, Haake, Kaplansky, Kimura, Kirillov, Kolchin, Kovacic, Maciejewski, Maciejewski, Marek Kuś, Mehta, Morales-Ruiz, Pechukas, Perelomov, Poincaré, Pommaret, Saenz, Schäfer, Simon, Yukawa, Ziglin, Ziglin   +30 more
core   +1 more source

Castanea sativa mill. flowers as a source of bioactive phenolic compounds [PDF]

, 2014
In the Trás-os-Montes region of Portugal and across a good part of the Mediterranean countries, chestnut trees are a considerable part of the landscape.
Barros, Lillian, Bento, Albino, Carocho, Márcio, Ferreira, Isabel C.F.R., Morales, Patricia, Santos-Buelga, Celestino   +5 more
core  

Nonautonomous Hamiltonian Systems and Morales-Ramis Theory I. The Case $\ddot{x}=f(x,t)$

, 2012
In this paper we present an approach towards the comprehensive analysis of the non-integrability of differential equations in the form $\ddot x=f(x,t)$ which is analogous to Hamiltonian systems with 1+1/2 degree of freedom.
Morales-Ruiz J. J., Morales-Ruiz J. J., Primitivo B. Acosta-Humánez, Stoyanova T.   +3 more
core   +1 more source

Amitsur's theorem, semicentral idempotents, and additively idempotent semirings

Open Mathematics
The article explores research findings akin to Amitsur’s theorem, asserting that any derivation within a matrix ring can be expressed as the sum of an inner derivation and a hereditary derivation.
Rachev Martin, Trendafilov Ivan
doaj   +1 more source

Analyses physico-chimiques des eaux de la Lagune Ebrié effectuées de 1979 à 1981 au cours des programmes "Variabilité interannuelle" et "Baie de Biétri" [PDF]

, 1984
Physico-chemical data collections aimed to assess the interannual variability of the lagoon hydroclimate and the impact of an airport dam on the water quality of the Ebrié ...
Chantraine, J.M., Djedje, R., Guiral, D.
core  

Créer les conditions de possibilité de la réussite de tous les élèves [PDF]

, 2012
National ...
Guével, Marie-Renée, Jourdan, Didier, Pironom, Julie, Pommier, Jeanine   +3 more
core  

Extensions of differential representations of SL(2) and tori

, 2011
Linear differential algebraic groups (LDAGs) measure differential algebraic dependencies among solutions of linear differential and difference equations with parameters, for which LDAGs are Galois groups.
Alexey Ovchinnikov, Andrey Minchenko, Cassidy, Kolchin, Kolchin, Zobnin   +5 more
core   +1 more source