HIGHLIGHTS
SUMMARY
Although not as rigorous as the previous method, the extremal functional allows a quite accurate and precise determination of the CFT data, see e_g_[11] for an application to the 3d Ising model. Locating, even approximately, putative CFTs could be a useful first step to understand which assumptions to impose so that these theories become extremal and hence amenable to, e_g, a fully rigorous bootstrap analysis. Though this is an interesting line of research to pursue, it is not clear to the authors if and how such techniques can alleviate the problem of fake . . .
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