convert number to cardinality selbri; x_{1} is the mass formed from set x_{2} whose n member(s) are x_{3}.

[x_{1} is a mass with N components x_{3} composing set x_{2}; x_{2} is an n-tuple (x_{2} is completely specified) (= selmei for reordered places); x_{1} forms an n-some; x_{3} (not necessarily a complete enumeration) are among the members of x_{2}]; See also cmima, gunma, cmavo list moi.