x1 is a binary relationship which is transitive in space/under conditions/on set x2.
Denote this binary relation x1 between elements y, z (in that order) by "y R z" (in that order); then, for any elements a, b, c in the set of consideration (possibly x2), if a R b and b R C, then a R c. See also: "kinra", "kinfi"; "taknyklojyzilpra", ".efklipi", ".efklizu".