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Existence Theorems for a Fourth-Order Exponential PDE Related to Crystal Surface Growth

In this article we prove the global existence of a unique strong solution to the initial boundary-value problem for a fourth-order exponential PDE. The equation we study was originally proposed to study the evolution of crystal surfaces, and was derived by applying a nonstandard scaling regime to a microscopic Markov jump process with Metropolis rates. Our investigation here finds that compared to the PDE's which use Arhenious rates, (and also have a fourth order exponential nonlinearity) the hyperbolic sine nonlinearity in our equation can offer much better control over the exponent term even in high dimensions.

preprint2022arXivOpen access
Brock C. PriceXiangsheng Xu
math.AP
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Open access2 authors1 topic
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Brock C. PriceXiangsheng Xu

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