Now showing items 21-30 of 357
Almost commuting matrices
(Elsevier, 1979-09)
It is shown that if A and B are n x n complex matrices with A = A* and ||AB - BA||2/(n - 1), then there exist n x n matrices A' and B' with A' = A'* such that A'B' = B'A' and ||A - A'||[les] [epsilon], ||B - B'||[les] ...
On Travelling Waves for the Stochastic Fisher–Kolmogorov–Petrovsky–Piscunov Equation
(Kluwer Academic Publishers-Plenum Publishers; Springer Science+Business Media, Inc., 2005-08)
This paper is concerned with properties of the wave speed for the stochastically perturbed Fisher–Kolmogorov–Petrovsky–Piscunov (FKPP) equation. It was shown in the classical 1937 paper by Kolmogorov, Petrovsky and Piscunov ...
Infinite Prandtl Number Convection
(Kluwer Academic Publishers-Plenum Publishers; Kluwer Academic/Plenum Publishers ; Springer Science+Business Media, 1999-01)
We prove an inequality of the type N ≤ CR 1/3 (1+log + R ) 2/3 for the Nusselt number N in terms of the Rayleigh number R for the equations describing three-dimensional Rayleigh–Bénard convection in the limit of infinite ...
Semiclassical spectra of gauge fields
(Elsevier, 1992-11-15)
We study the asymptotic behavior of the eigenvalues of the Schrodinger operator with a vector potential on a compact manifold, as Planck's constant tends to zero. We obtain estimates in terms of periodic trajectories of ...
A phase cell approach to Yang-Mills theory
(Springer-Verlag, 1987-06)
In this paper the basic local stability result is obtained, in a form valid in both small field and large field regions. To achieve this, some modifications are made in both the action and the renormalization group ...
On the group velocity of symmetric and upwind numerical schemes
(John Wiley & Sons, Ltd, 1994-06-15)
Dissipative numerical approximations to the linear advection equation are considered with respect to their behaviour in the limit of weak dissipation. The context is wave propagation under typical far-field conditions where ...
Diverse homogeneous sets
(Elsevier, 1992-03)
A set H [subset of or equal to] [omega] is said to be diverse with respect to a partition [Pi] of [omega] if at least two pieces of [Pi] have an infinite intersection with H. A family of partitions of [omega] has the Ramsey ...