Scaling-critical Strichartz estimates for rational metrics on compact Lie groups

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Let GG be a compact Lie group equipped with a rational metric gg. Let dd be the dimension of GG and rr the rank of GG. Let I⊂RI\subset\mathbb{R} be a finite time interval. Compact-Lie-group Strichartz conjecture. The scaling-critical estimates

∥eitΔgf∥Lp(I×G)≲∥f∥Hd2−d+2p(G)\|e^{it\Delta_g}f\|_{L^p(I\times G)}\lesssim\|f\|_{H^{\frac{d}{2}-\frac{d+2}{p}}(G)}

hold for all p>2+4rp>2+\frac{4}{r}. This is motivated by the corresponding results on tori and the role of rational metrics; the conjecture concerns the expected extension of those estimates to compact Lie groups.

References

Primary source

Yunfeng Zhang, “Strichartz estimates for the Schrödinger flow on compact Lie groups”, arXiv:1703.07548 (2020).

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