László Fejes Tóth (Szeged, 12 March 1915 – Budapest, 17 March 2005) was a Hungarianmathematician who specialised in geometry. He proved that a lattice pattern is the most efficient way to pack centrally symmetric convex sets on the Euclidean plane (a generalization of Thue's theorem, a 2-dimensional analog of the Kepler conjecture). He also investigated packings on the sphere. He was the first to show, in 1953, that the Kepler conjecture can be reduced to a finite case analysis.
He was a member of the Hungarian Academy of Sciences (from 1962), former director of the Mathematical Research Institute (1970-1983), and received both the Kossuth Prize (1957) and State Award (1973).
Fejes Tóth, L. (1953), Lagerungen in der Ebene, auf der Kugel und im Raum, Die Grundlehren der Mathematischen Wissenschaften in Einzeldarstellungen mit besonderer Berücksichtigung der Anwendungsgebiete, Band LXV, Berlin, New York: Springer-Verlag, MR0057566