نتایج جستجو برای: pointwise pseudo

تعداد نتایج: 54484  

Journal: :Journal of Computational and Applied Mathematics 1987

Journal: :Mathematical Proceedings of the Cambridge Philosophical Society 1992

Journal: :Journal of the London Mathematical Society 2008

Journal: :Proceedings 2022

We introduce a pointwise variant of the Assouad dimension for measures on metric spaces, and study its properties in relation to global dimension. show that, general, value may differ from counterpart, but many classical cases, exhibits similar exact dimensionality as local dimension, namely it equals almost everywhere. also prove an explicit formula certain invariant with place-dependent proba...

2008
JENNIFER BURKE QI S. ZHANG

We obtain a pointwise, a priori bound for the vorticity of axis symmetric solutions to the 3 dimensional Navier-Stokes equations. The bound is in the form of a reciprocal of a power of the distance to the axis of symmetry. This seems to be the first general pointwise estimate established for the axis symmetric Navier-Stokes equations.

Journal: :Adv. Comput. Math. 2007
S. B. Damelin

We study pointwise bounds of orthogonal expansions on the real line for a class of exponential weights of smooth polynomial decay at infinity. As a consequence of our main results, we establish pointwise bounds for weighted Hilbert transforms which are of independent interest.

Journal: :CoRR 2015
Fulvio Forni Alexandre Mauroy Rodolphe Sepulchre

The paper shows that normally hyperbolic one-dimensional compact attractors of smooth dynamical systems are characterized by differential positivity, that is, the pointwise infinitesimal contraction of a smooth cone field. The result is analog to the characterization of zero-dimensional hyperbolic attractors by differential stability, which is the pointwise infinitesimal contraction of a Rieman...

Journal: :بینا 0
عباس باقری a bagheri ocular tissue engineering research center, shahid beheshti university of medical sciences, tehran, iranمرکز تحقیقات مهندسی بافت چشم- دانشگاه علوم پزشکی شهید بهشتی- تهران- ایران رضا جعفری r jafari mazandaran university of medical sciences, sari, iran; 3ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranدانشگاه علوم پزشکی مازندران- ساری- ایران محدثه فیضی m feizi mazandaran university of medical sciences, sari, iran; 3ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranمرکز تحقیقات چشم- دانشگاه علوم پزشکی شهید بهشتی- تهران- ایران

purpose: to report a case who had optic disc duplication, a rare congenital disorder characterized by two well-defined discs in one eye. case report: a 19 months-old child presented with unilateral epiphora in the right eye since birthday. the right eye was smaller than the left eye and mild ptosis was apparent. nasolacrimal duct probing was performed under general anesthesia. the examination r...

1998
Eyal Amir

A decade ago, Pointwise Circumscription was proposed as a tool for formalizing common sense. In this paper, we revisit some of its uses and examine some cases in which it does not yield the intended behavior. Specifically, we explore the cases in which unsatisfiability may result from the presence of multiple minimal models (for McCarthy’s Circumscription). Then, we present a form of circumscri...

1986
Vladimir Lifschitz

Circumscription is the minimization of predicates subject to restrictions expressed by predicate formulas. We propose a modified notion of circumscription so that, instead of being a single minimality condition, it becomes an “infinite conjun(*tion” of “local” minimality conditions; each of these conditions expresses the impbssibility of changing the value of a predicate from true to f&e at one...

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