Problems and results in extremal combinatorics—I

The strong perfect graph theorem

Maria Chudnovsky, Neil Robertson, Paul Seymour et al. · Annals of Mathematics · 2006 · 1.3K citations · Full text

A theorem in finite projective geometry and some applications to number theory

James Singer · Transactions of the American Mathematical Society · 1938 · 731 citations

Galois Field, Finite Geometry, Geometry Of Number +10

Extensions of Lipschitz mappings into a Hilbert space

William B. Johnson · Medical Entomology and Zoology · 1984 · 666 citations

Riemann-hilbert Problem, Interpolation Space, Hilbert Space +2

On a Packing and Covering Problem

Vojtěch Rödl · European Journal of Combinatorics · 1985 · 404 citations

Mathematical Programming, Covering Problem, Covering Problems +7

Existence and Explicit Constructions of q + 1 Regular Ramanujan Graphs for Every Prime Power q

Moshe Morgenstern · Journal of Combinatorial Theory Series B · 1994 · 303 citations

Regular Ramanujan Graphs, Graph Theory, Explicit Constructions +6