nacyzmarai lujvo

x1 (number) is the greatest element/maximum of the set (of numbers) x2 under (partial) ordering x3

x1 must be a set. If this word is being used as a function (max), common but lazy mathematical practice allows for speaking of "the maximum of a function" (including sequences) or to constrain the maximum with respect to certain variables, but these constraints can and properly ought to be incorporated into the definition of the set of which the maximum is being taken. This word is not limited to purely mathematical usage and the set can be defined loosely (such as in "the maximum number of people whom I permit to be invited" wherein the set x2 is understood to be the set of the possible acceptable numbers of guests allowed by the speaker). The maximum x1 must belong to set x2; compare with: mecraizmana'u (supremum). See also: nacmecrai.

In notes:

x1 (number) is the supremum of set x2 under (partial) ordering x3
x1 (number) is the least element/minimum of the set (of numbers) x2 under (partial) ordering x3