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Localized initial data for Einstein equations

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arxiv 2210.09437 v2 pith:ZTRSM6RS submitted 2022-10-17 math.AP math.DG

classification math.APmath.DG
keywords datainitialalphaasymptoticallyeinsteinflatapplicationsapply
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abstract

We apply a new method with explicit solution operators to construct asymptotically flat initial data sets of the vacuum Einstein equation with new localization properties. Applications include an improvement of the decay rate in Carlotto--Schoen [arXiv:1407.4766] to $\mathcal{O}(|x|^{-(d-2)})$ and a construction of nontrivial asymptotically flat initial data supported in a degenerate sector $\{(x',x_d)\in\mathbb{R}^d:|x'|\leq x_d^\alpha\}$ for $\frac{3}{d+1}<\alpha<1$.

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