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- W4387076271 abstract "We consider perodic homogenization of boundary value problems for second-order semilinear elliptic systems in 2D of the type $$ mbox{div} left(A(x/varepsilon)nabla u(x)right)= b(x,u(x)) mbox{ for } x in Omega. $$ For small $varepsilon>0$ we prove existence of weak solutions $u=u_varepsilon$ as well as their local uniqueness for $|u-u_0|_infty approx 0$, where $u_0$ is a given non-degenerate weak solution to the homogenized boundary value problem, and we estimate the rate of convergence to zero of $|u_varepsilon-u_0|_infty$ for $varepsilon to 0$. Our assumptions are, roughly speaking, as follows: The map $y mapsto A(y)$ is bounded, measurable and $mathbb{Z}^2$-periodic, the maps $b(cdot,u)$ are bounded and measurable, the maps $b(x,cdot)$ are $C^1$-smooth, and $Omega$ is a bounded Lipschitz domain in $mathbb{R}^2$. Neither global solution uniqueness is supposed nor growth restriction of $b(x,cdot)$ nor $W^{2,2}$-regularity of $u_0$, and cross-diffusion is allowed. The main tool of the proofs is an abstract result of implicit function theorem type which in the past has been applied to singularly perturbed nonlinear ODEs and elliptic and parabolic PDEs and, hence, which permits a common approach to existence, local uniqueness and error estimates for singularly perturbed problems and and for homogenization problems." @default.
- W4387076271 created "2023-09-27" @default.
- W4387076271 creator A5038852029 @default.
- W4387076271 creator A5062942964 @default.
- W4387076271 date "2023-09-25" @default.
- W4387076271 modified "2023-10-12" @default.
- W4387076271 title "A Common Approach to Singular Perturbation and Homogenization II: Semilinear Elliptic Systems" @default.
- W4387076271 doi "https://doi.org/10.48550/arxiv.2309.14108" @default.
- W4387076271 hasPublicationYear "2023" @default.
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