We prove that the cubic wave equation is globally well-posed and scattering for radial initial data lying in . This space of functions is a scale-invariant subspace of .
"Global well-posedness and scattering for the radial, defocusing, cubic wave equation with initial data in a critical Besov space." Anal. PDE 12 (4) 1023 - 1048, 2019. https://doi.org/10.2140/apde.2019.12.1023