Uniform decoupling conjecture for the parabola below scale N2N^2

Let s[1,2)s\in[1,2) and 2p2+2s2\le p\le 2+2s. Write D(N,Ns,p)D(N,N^s,p) for the decoupling constant associated with the parabola at spatial scale NsN^s and exponent pp. Uniform decoupling conjecture. There exists C(s)>0C(s)>0 such that

D(N,Ns,p)C(s).D(N,N^s,p)\le C(s).

The conjecture asserts that the relevant decoupling constants remain uniformly bounded in NN for scales strictly below N2N^2 throughout the indicated range of exponents. The surrounding discussion notes that the preceding superlevel-set estimates are not sharp in this regime, apart from endpoint-type cases.

Sources & referencesView supporting material

Primary source

Yuqiu Fu, Larry Guth and Dominique Maldague, “Sharp superlevel set estimates for small cap decouplings of the parabola”, arXiv:2107.13139 (2021).

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