TY - JOUR T1 - Poznámka o Vennových diagramoch A1 - Doboš, Jozef JA - Obzory matematiky, fyziky a informatiky Y1 - 2015 VL - 44 IS - 4 SP - 1 EP - 6 SN - 1335-4981 N2 - The purpose of this paper is to present an interesting proof technique of set identities by Venn diagrams, namely “Proving Set Identities with One Example”, which is quite rarely found in textbooks. ER -