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The Wave Equation with Computable Initial Data Whose Unique Solution Is Nowhere Computable

โœ Scribed by Marian B. Pour-El; Ning Zhong


Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
456 KB
Volume
43
Category
Article
ISSN
0044-3050

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โœฆ Synopsis


Abstract

We give a rough statement of the main result. Let D be a compact subset of โ„^3^ร— โ„. The propagation u(x, y, z, t) of a wave can be noncomputable in any neighborhood of any point of D even though the initial conditions which determine the wave propagation uniquely are computable. A precise statement of the result appears below.


๐Ÿ“œ SIMILAR VOLUMES


Trace identities for solutions of the wa
โœ David Finch; Rakesh ๐Ÿ“‚ Article ๐Ÿ“… 2005 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 169 KB

## Abstract Suppose __u__ is the solution of the initial value problem Suppose __n__ โ‰ฅ 1 is odd, __f__ and __g__ are supported in a ball __B__ with boundary __S__, and one of __f__ or __g__ is zero. We derive identities relating the norm of __f__ or __g__ to the norm of the trace of __u__ on __S_