Highly nonlinear large-competition limits of elliptic systems |
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Authors: | ECM Crooks EN Dancer |
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Institution: | a Department of Mathematics, Swansea University, Swansea SA2 8PP, UK b School of Mathematics and Statistics, University of Sydney, NSW 2006, Australia |
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Abstract: | This article is concerned with the effect of different types of competitive interaction terms on the large-interaction limit of nonlinear elliptic systems modelling the steady states of populations that compete in some region. As the competition rate tends to infinity, we show that non-negative solutions of quite simple-looking systems converge to the positive and negative parts of a solution of a scalar limit problem which may be much more strongly nonlinear than the original system, possibly with quadratic growth in the gradient of the limit function. |
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Keywords: | Competition systems Singular limits Spatial segregation Quadratic gradient growth |
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