non-logical connective/mekso operator - of arity only 1 xor 2: set (absolute) complement, or set exclusion (relative complement). Unary: X_{1 ^C}; binary: X_{1 - X}.

In the definition and in this note, due to parsing constraints, "-" represents set exclusion; this is typically denoted as a backslash elsewhere. Each input must be a set or similar. The definition of the binary case expands to "the set of all elements which are in X_{1} but not in X_{2}". This word and operator has ordered input: 'X_{1} kei'i X_{2}' is not generally equivalent to 'X_{2} kei'i X_{1}'; in other words, the operator is not commutative. If unary (meaning that X_{1} is not explicitly specified in a hypothetical expression "X_{1 - X}"), then X_{1} is taken to be some universal set O in/of the discourse (of which all other mentioned sets are subsets, at the least); in this case, the word operates as the set (absolute) complement of the explicitly mentioned set here (but not in the definition) designated as X_{2} for clarity (id est: the output is O - X_{2 }= X_{2 ^C}, where "^{C}" denotes the set absolute complement; in other words, it is the set of all elements which may be under consideration such that they are not elements of the explicitly specified set). When binary with both X_{1} and X_{2} explicitly specified, this word/operator is the set relative complement. Somewhat analogous to logical 'NOT' (just as set intersection is analogous to logical 'AND', and set union is analogous to logical '(AND/)OR'). The preferred description/name in English is "set (theoretic) exclusion". For reference: https://en.wikipedia.org/wiki/Complement_(set_theory) .

- jo'ei'i
- nonlogical connective (and mekso operator) - symmetric difference of sets
- mau'au
- mekso: conversion of operator/function to operand
- xa'ei'o
- binary mekso operator: Let the inputs X
_{1}and X_{2}be sets in the same universal set O; then the result of this operator applied to them is X_{1^c \cup X}, where for any A \subseteq O, A^{c }= O \setminus A. - kleivmu
- x
_{1}(set) is the relative set complement of x_{2}(set) in/from/with respect to/relative to set x_{3}(set; default: the relevant universal set).