On grammatical class:
- xa'ei'o
- binary mekso operator: Let the inputs X1 and X2 be sets in the same universal set O; then the result of this operator applied to them is X1^c
\cup X, where for any A \subseteq O, Ac = O \setminus A.
- xa'ei'u
- binary mekso operator: Let the inputs X1 and X2 be sets in the same universal set O; then the result of this operator applied to them is X1^c
\cap X, where for any A \subseteq O, Ac = O \setminus A.