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Nonstandard
existence proofs for reaction diffusion equations
Connor Olson, Marshall Mueller and Sigurd B. Angenent
Vol. 12 (2019), No. 6, 1015–1034
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Abstract |
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We give an existence proof for distribution solutions to a scalar reaction diffusion equation, with the aim of illustrating both the differences and the common ingredients of the nonstandard and standard approaches. In particular, our proof shows how the operation of taking the standard part of a nonstandard real number can replace several different compactness theorems, such as Ascoli’s theorem and the Banach–Alaoglu theorem on weak-compactness of the unit ball in the dual of a Banach space. |
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\vrule height 2.5pt depth -2pt width 26pt To the memory of Terry Millar \vrule height 2.5pt depth -2pt width 26pt |
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Keywords
nonstandard analysis, partial differential equations,
reaction diffusion equations
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Mathematical Subject Classification 2010
Primary: 26E35, 35K57
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Milestones
Received: 19 September 2018
Revised: 28 March 2019
Accepted: 2 April 2019
Published: 3 August 2019
Communicated by Suzanne Lenhart
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Authors |
| Connor Olson | |
| Department of Mathematics University of Wisconsin Madison, WI United States |
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| Marshall Mueller | |
| Department of Mathematics Tufts University Medford, MA United States |
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| Sigurd B. Angenent | |
| Department of Mathematics University of Wisconsin Madison, WI United States |
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