Displaying similar documents to “Sur une algèbre Q-symétrique”

Comportement local moyen de la fonction de Brjuno

Michel Balazard, Bruno Martin (2012)

Fundamenta Mathematicae

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We describe the average behaviour of the Brjuno function Φ in the neighbourhood of any given point of the unit interval. In particular, we show that the Lebesgue set of Φ is the set of Brjuno numbers and we find the asymptotic behaviour of the modulus of continuity of the integral of Φ.

Spaces of type H ∞ + C

Walter Rudin (1975)

Annales de l'institut Fourier

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A simple theorem is proved which states a sufficient condition for the sum ot two closed subspaces of a Banach space to be closed. This leads to several analogues of Sarason’s theorem which states that H ∞ + C is a closed subalgebra of L ∞ . In these analogues, the unit circle is replaces by other groups, and the unit disc is replaced by polydiscs or by balls in spaces of several complex variables. Sums of closed ideals in Banach algebras are also studied.

Fonction de Correlation pour des Mesures Complexes

Wei Min Wang (1998-1999)

Séminaire Équations aux dérivées partielles

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We study a class of holomorphic complex measures, which are close in an appropriate sense to a complex Gaussian. We show that these measures can be reduced to a product measure of real Gaussians with the aid of a maximum principle in the complex domain. The formulation of this problem has its origin in the study of a certain class of random Schrödinger operators, for which we show that the expectation value of the Green’s function decays exponentially.

About being

Bertram Kienzle (2003)

Philosophia Scientiae

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Dans cet article c’est la question pérenne de l’être qui est discutée. On esquisse une nouvelle espèce d’ontologie, appelée «ontologie des événements», selon laquelle les objets naturels peuvent être construits comme des événements avec une dimension spatiale. Ce cadre ontologique est utilisé pour introduire quelques-unes des modalités réelles et pour en donner les conditions de vérité. Les modalités discutées sont les attributions modales comme, par exemple, «Néandre peut nager» et...