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Sharp convergence for sequences of nonelliptic Schrödinger means

2020/11/20 by Li, Wenjuan, Wang, Huiju, Yan, Dunyan
#35S10 #42B20 #42B25 #Analysis of PDEs (math.AP) #Classical Analysis and ODEs (math.CA) #FOS: Mathematics

paper · doi:10.48550/arxiv.2011.10160

Abstract

We consider pointwise convergence of nonelliptic Schrödinger means e^itn\squaref(x) for f ∈ Hs(ℝ2) and decreasing sequences \tn\n=1 converging to zero, where e^itn\square f( x ): = ∫_ℝ2 e^i( x ⋅ ξ+ tn ξ1ξ2 )\widehatf ( ξ)dξ. We prove that when 0

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