On a Recursive Approximation of Singularly Perturbed Parabolic Equations
โ Scribed by J. Struckmeier; A. Unterreiter
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 165 KB
- Volume
- 250
- Category
- Article
- ISSN
- 0022-247X
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โฆ Synopsis
The asymptotic analysis of IBVPs for the singularly perturbed parabolic PDE ัจ u q ัจ u s ัจ u in the limit ยช 0 motivates investigations of certain recur-
ลฝ . sively defined approximative series ''ping-pong expansions'' . The recursion formulae rely on operators assigning to a boundary condition at the left or the right boundary a solution of the parabolic PDE. Sufficient conditions for uniform convergence of ping-pong expansions are derived and a detailed analysis for the model problem ัจ u q ัจ u s ัจ u is given.
๐ SIMILAR VOLUMES
We discuss singular perturbations of a self-adjoint positive operator A in Hilbert space H formally given by A T =A+T, where T is a singular positive operator (singularity means that Ker T is dense in H). We prove the following result: if T is strongly singular with respect to A in the sense that Ke
A method to eliminate the fast modes in a singularly perturbed system driven by white noise is presented together with error analysis. An approximate model is derived by replacing the transfer functions of the fast elements with their truncated Maclaurin expansions. It is shown that if the slow elem
A method to construct grid approximations for singularly perturbed boundary value problems for elliptic and parabolic equations, whose solutions contain a parabolic boundary layer, is considered. The grid approximations are based on the fitted operator method. Finite difference schemes, finite eleme