Search results for "Godi"

Dynamics of the scenery flow and geometry of measures

2015

We employ the ergodic theoretic machinery of scenery flows to address classical geometric measure theoretic problems on Euclidean spaces. Our main results include a sharp version of the conical density theorem, which we show to be closely linked to rectifiability. Moreover, we show that the dimension theory of measure-theoretical porosity can be reduced back to its set-theoretic version, that Hausdorff and packing dimensions yield the same maximal dimension for porous and even mean porous measures, and that extremal measures exist and can be chosen to satisfy a generalized notion of self-similarity. These are sharp general formulations of phenomena that had been earlier found to hold in a n…

Guillem Godi, "Si·l gen cors d’estieu es remas" (BdT 219.1)

2018

This article offers a new edition, based on Occitan Chansonnier R, of the canso-sirventes Si·l gen cors d’estieu es remas by the troubadour Guillem Godi. Moving from a textual and documentary analysis, as well as a material-philological perspective, the lectura proposes a later date for the composition (late 13th - early 14th century); moreover, a possible identification of the author with the cardinal Guillem de Peire Godin (1260-1336) is cautiously suggested.

MR2966106 Reviewed Shahidi, F. A.; Ganiev, I. G. Vector valued martingale-ergodic and ergodic-martingale theorems. Stoch. Anal. Appl. 30 (2012), no. …

2013

L’algodistrofia post-traumatica

2015

Non disponibile

EFFICACIA DEL TRATTAMENTO RIABILITATIVO INTEGRATO CON RIEDUCAZIONE PROPRIOCETTIVA E MIRROR THERAPY NELLA CRPS-I DEL POLSO: STUDIO RANDOMIZZATO CONTRO…

2008

Patrimonio abitativo

2018

Il contributo restituisce il quadro del patrimonio abitativo in Sicilia attraverso l'analisi e l'interpretazione dei dati del XV Censimento. In particolare, attraverso l'elaborazione di grafici, tabelle e cartogrammi, si evidenzia lo stock edilizio esistente, quello non utilizzato e il numero di abitazioni occupate da residenti per figura giuridica del proprietario e per titolo di godimento. Il contributo illustra la comparazione delle province siciliane e in taluni casi anche il riferimento ad altre aree geografiche d'Italia.

Dynamics and spectra of composition operators on the Schwartz space

2017

[EN] In this paper we study the dynamics of the composition operators defined in the Schwartz space of rapidly decreasing functions. We prove that such an operator is never supercyclic and, for monotonic symbols, it is power bounded only in trivial cases. For a polynomial symbol ¿ of degree greater than one we show that the operator is mean ergodic if and only if it is power bounded and this is the case when ¿ has even degree and lacks fixed points. We also discuss the spectrum of composition operators.

Static and dynamic glass transitions in the 10-state Potts glass: What can Monte Carlo simulations contribute?

2002

The p-state Potts glass with infinite range Gaussian interactions can be solved exactly in the thermodynamic limit and exhibits an unconventional phase behavior if p >4: A dynamical transition from ergodic to non-ergodic behavior at a temperature T D is followed by a first order transition at T 0 < T D, where a glass order parameter appears discontinuously, although the latent heat is zero. If one assumes that a similar scenario occurs for the structural glass transition as well (though with the singular behavior at T D rounded off), the p-state Potts glass should be a good test case to develop methods to deal with finite size effects for the static as well as the dynamic transition, and to…

Ergodicity for a stochastic Hodgkin–Huxley model driven by Ornstein–Uhlenbeck type input

2013

We consider a model describing a neuron and the input it receives from its dendritic tree when this input is a random perturbation of a periodic deterministic signal, driven by an Ornstein-Uhlenbeck process. The neuron itself is modeled by a variant of the classical Hodgkin-Huxley model. Using the existence of an accessible point where the weak Hoermander condition holds and the fact that the coefficients of the system are analytic, we show that the system is non-degenerate. The existence of a Lyapunov function allows to deduce the existence of (at most a finite number of) extremal invariant measures for the process. As a consequence, the complexity of the system is drastically reduced in c…

Applications de type Lasota–Yorke à trou : mesure de probabilité conditionellement invariante et mesure de probabilité invariante sur l'ensemble des …

2003

Abstract Let T :I→I be a Lasota–Yorke map on the interval I, let Y be a nontrivial sub-interval of I and g 0 :I→ R + , be a strictly positive potential which belongs to BV and admits a conformal measure m. We give constructive conditions on Y ensuring the existence of absolutely continuous (w.r.t. m) conditionally invariant probability measures to nonabsorption in Y. These conditions imply also existence of an invariant probability measure on the set X∞ of points which never fall into Y. Our conditions allow rather “large” holes.