Results 31 to 40 of about 1,376,473 (288)
Karpatsʹkì Matematičnì Publìkacìï, 2019 In this paper, we continue the study of approximative characteristics of the classes $B^{\Omega}_{p,\theta}$ of periodic functions of several variables whose majorant of the mixed moduli of continuity contains both exponential and logarithmic multipliers.
O.V. Fedunyk-Yaremchuk, S.B. Hembars'ka
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Special Properties of Plane Solenoidal Fields
Mathematics, 2021 Algebraic and integral identities have been obtained for a pair or a triple of plane solenoidal fields. We obtain sufficient potentiality conditions for a plane vector field. The integral identities are also important for exact a priori estimates.
Vladimir I. Semenov
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Exact versus estimated pruning of subject hierarchies [PDF]
Proceedings of the American Society for Information Science and Technology, 2013 AbstractMany large digital collections are organized by subject; these useful information organization structures are large and complex, thus difficult to browse. Current online tools and visualization prototypes show small localized subsets and do not provide the ability to explore the predominant patterns of the overall subject structure.
Julien, Charles-Antoine, Tirilly, Pierre
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Semilinear geometric optics with boundary amplification [PDF]
, 2012 We study weakly stable semilinear hyperbolic boundary value problems with highly oscillatory data. Here weak stability means that exponentially growing modes are absent, but the so-called uniform Lopatinskii condition fails at some boundary frequency ...
Alinhac +6 more
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Sharp Estimates of Radial Dunkl and Heat Kernels in the Complex Case $A_n$
Comptes Rendus. Mathématique, 2021 In this article, we consider the radial Dunkl geometric case $k=1$ corresponding to flat Riemannian symmetric spaces in the complex case and we prove exact estimates for the positive valued Dunkl kernel and for the radial heat kernel.
Graczyk, Piotr, Sawyer, Patrice
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Order estimates for the exact Lugannani–Rice expansion [PDF]
Japan Journal of Industrial and Applied Mathematics, 2014 The Lugannani-Rice formula is a saddlepoint approximation method for estimating the tail probability distribution function, which was originally studied for the sum of independent identically distributed random variables. Because of its tractability, the formula is now widely used in practical financial engineering as an approximation formula for the ...
Takashi Kato +2 more
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Path-integral Monte Carlo and the squeezed trapped Bose-Einstein gas
, 2006 Bose-Einstein condensation has been experimentally found to take place in finite trapped systems when one of the confining frequencies is increased until the gas becomes effectively two-dimensional (2D).
Fernández, Juan Pablo +1 more
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Counting Contours on Trees [PDF]
, 2016 We calculate the exact number of contours of size $n$ containing a fixed vertex in $d$-ary trees and provide sharp estimates for this number for more general trees.
Alon, Noga +2 more
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Effective potential in three-dimensional O(N) models
, 1998 We consider the effective potential in three-dimensional models with O(N) symmetry. For generic values of N, and in particular for the physically interesting cases N=0,1,2,3, we determine the six-point and eight-point renormalized coupling constants ...
Antonenko +54 more
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Local exact controllability of the age-dependent population dynamics with diffusion
Abstract and Applied Analysis, 2001 We investigate the local exact controllability of a linear age and space population dynamics model where the birth process is nonlocal. The methods we use combine the Carleman estimates for the backward adjoint system, some estimates in the theory of ...
Bedr'eddine Ainseba, Sebastian Anita
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