unordered pair (Q1477744)
set having two elements a and b with no particular relation between them
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other details
aliases pair set
 binary set
description set having two elements a and b with no particular relation between them

External Links
(P646) /m/0471jg
(P2812) Pair
(P4215) unordered pair
(P6366) 54373215
(P12888) df-pr