Kazimierz Kuratowski (b. February 2, 1896, d. June 18, 1980) was a Polish mathematician who worked primarily in general topology and mathematical logic.
He is probably best known for a celebrated theorem in graph theory: that a graph is planar iff neither the complete graph on vertices nor the complete bipartite graph on a pair of -element sets appear as edge subdivisions of subgraphs of (closely related to Wagner’s theorem that this is the case iff neither nor appear as graph minors of ).
C. Kuratowski, Sur la notion d’ensemble fini , Fund. Math. I (1920) pp.130-131. (pdf)
C. Kuratowski, Sur l’opération de l’analysis situs , Fund. Math. III (1922) pp.192-195. (pdf)
Casimir Kuratowski (1930), “Sur le problème des courbes gauches en Topologie”, Fundamenta Mathematicae, 15 (1):271-283. (eudml)
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