Union Closed Sets Conjecture: Combinatorial Mathematics, Péter Frankl, Family of Sets, Empty Set, Complement Set

Algebra of Sets: Set (mathematics), Union (set theory), Intersection Complement Binary relation, Equality (mathematics)

Positively Separated Sets: Mathematics, Non Empty, Subset

Concave Set: Mathematics, Convex Set, Complement (mathematics)

Vector Measure: Mathematics, Family of Sets, Function (Mathematics), Space, Measure (Mathematics)