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Dominique Barbolosi 《Monatshefte für Mathematik》1999,28(4):189-200
For any irrational , let denote the regular continued fraction expansion of x and define f, for all z > 0 by and by J. GALAMBOS proved that (μ the Gauss measure)
In this paper, we first point out that for all , ( has no limit for for almost all , proving more precisely that: For all , one has for almost all
相似文献
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D. Barbolosi 《Monatshefte für Mathematik》1990,109(1):25-37
Let (B
n
)
n
be the sequence of denominators of convergents, given by the continued fraction expansion with odd partial quotients of an irrational number. For integersm>2 andk, 0k<m, we give (almost everywhere) the density of the set of integersn such thatB
n
is congruent tok modm. This result comes from an ergodic system.
Recherche partiellement subventionnée par l'URA no225, CNRS, Marseille. 相似文献
Recherche partiellement subventionnée par l'URA no225, CNRS, Marseille. 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1999,328(11):999-1002
We introduce a notion of characteristic codirections for 2 × 2 systems of conservation laws in two-dimensional space. These codirections are used to construct rarefaction waves. 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1997,324(9):959-962
We generalize to second order logic a result of Keisler concerning second order arithmetic. We prove that for any countable second order model, verifying certain axioms, there exists an elementary extension having the same domain of intrepretation for individuals and whose domain of interpretation for relations is uncountable. The axioms we ask for are the comprehension scheme, a choice scheme and a pairing scheme that allow us not to have explicitly a pairing function in the language. 相似文献
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Serge Alinhac 《Inventiones Mathematicae》1993,111(1):627-670
Résumé Nous considérons le système des équations d'Euler isentropiques en dimension deux; pour des données initiales invariantes par rotation et perturbations de taille d'un état de repos, on établit un équivalent du temps de vieT
de la solution classique (lim
2
T
=
*
2
).De plus, on donne, pour
une estimation de la vraie solution, en calculant la taille de son écart à une solution approchée construite dans un précédent travail.
Oblatum 2-XII-1991 & 24-IX-1992 相似文献
Summary We consider the 2D isentropic Euler equations; for rotationnally invariant data which are a perturbation of size of a rest state, we establish the first term asymptotic of the life spanT of the classical solution (lim 2 T = * 2 ).Moreover, we give, for an estimate of the true solution, by computing the size of its difference with an approximate solution obtained in a previous work.
Oblatum 2-XII-1991 & 24-IX-1992 相似文献
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Sans résumé 相似文献
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