Adjective
pairwise disjoint (not comparable)
(mathematics, set theory, of a collection of two or more sets) Let
{
A
λ
}
λ
∈
Λ
{\displaystyle \{A_{\lambda }\}_{\lambda \in \Lambda }}
be any collection of sets indexed by a set
Λ
{\displaystyle \Lambda }
. We call the indexed collection pairwise disjoint if for any two distinct indices,
λ
,
μ
∈
Λ
{\displaystyle \lambda,\mu \in \Lambda }
, the sets
A
λ
{\displaystyle A_{\lambda }}
and
A
μ
{\displaystyle A_{\mu }}
are disjoint.