CC BY-SA 4.0 UnportedNegro, GiuseppeOliveira e Silva, Diogo2024-10-162024-10-162023https://oa.tib.eu/renate/handle/123456789/16857https://doi.org/10.34657/15879We describe how simple observations related to vectors of length 1 recently led to the proof of an important mathematical fact: the sharp Stein–Tomas inequality from Fourier restriction theory, a pillar of modern harmonic analysis with surprising applications to number theory and geometric measure theory.enghttp://creativecommons.org/licenses/by-sa/4.0/510AnalysisReport