Recension de Yves Matheron
نویسندگان
چکیده
منابع مشابه
Polymer dynamics in time - dependent Matheron - de
Polymer dynamics in time-dependent Matheron-de Marsily flows: An exactly solvable model. Abstract We introduce a new model of random layered media, extending the Matheron-de Marsily model: Here we allow for the flows to change in time. For such layered structures, we solve exactly the equations of motion for single particles, and also for polymers modelled as Rouse chains. The results show a ri...
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We show that the longitudinal position x(t) of a particle in a (d+1)-dimensional layered random velocity field (the Matheron-de Marsily model) can be identified as a fractional Brownian motion (fBm) characterized by a variable Hurst exponent H(d)=1-d/4 for d<2 and H(d)=1/2 for d>2. The fBm becomes marginal at d=2. Moreover, using the known first-passage properties of fBm we prove analytically t...
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To study the behavioral and cognitive structures that form in the childhood of animals, cognitive science has for a long time organized theories by trying to identify what is innate and what is learned, and how nature and nurture interact to influence each other. However, recent advances in developmental sciences are strongly questioning the relevance of this scientific framing based on the nat...
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We exhibit rigid rotations of spheres as distortion elements in groups of diffeomorphisms, thereby answering a question of Handel. We also show that every homeomorphism of a sphere is, in a suitable sense, as distorted as possible in the group Homeo(Sn), thought of as a discrete group. An appendix by Y. de Cornulier shows that Homeo(Sn) has the strong boundedness property, recently introduced b...
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ژورنال
عنوان ژورنال: Éducation et didactique
سال: 2015
ISSN: 1956-3485,2111-4838
DOI: 10.4000/educationdidactique.2226