byjus.com › maths › venn-diagramsVenn Diagrams of Sets - Definition, Symbols, A U B Venn ... Venn diagram, introduced by John Venn (1834-1883), uses circles (overlapping, intersecting and non-intersecting), to denote the relationship between sets. A Venn diagram is also called a set diagram or a logic diagram showing different set operations such as the intersection of sets, union of sets and difference of sets. It is also used to ...