18.19. Other uses of mekso

The following cmavo are discussed in this section:

me'o

LI

the mekso

nu'a

NUhA

operator to selbri

mai

MAI

utterance ordinal

mo'o

MAI

higher order utterance ordinal

roi

ROI

quantified tense

So far we have seen mekso used as sumti (with li), as quantifiers (often parenthesized), and in MOI and ME-MOI selbri. There are a few other minor uses of mekso within Lojban.

The cmavo me'o has the same grammatical use as li but slightly different semantics. li means the number which is the value of the mekso ..., whereas me'o just means the mekso ... So it is true that:

Example 18.128. 

liresu'iredulivo
The-numbertwoplustwoequalsthe-numberfour.
2 + 2 = 4

but false that:

Example 18.129. 

me'oresu'iredume'ovo
The-meksotwoplustwoequalsthe-meksofour.

2 + 2=4


since the expressions 2 + 2 and 4 are not the same. The relationship between li and me'o is related to that between la .djan., the person named John, and zo .djan., the name John

The cmavo nu'a is the inverse of na'u, and allows a mekso operator to be used as a normal selbri, with the place structure:

x1 is the result of applying (operator) to x2, x3, ...

for as many places as may be required. For example:

Example 18.130. 

lini'umucunu'ava'alima'umu
The-number-5is-the-operatornegation-ofthe-number+5.

uses nu'a to make the operator va'a into a two-place bridi

Used together, nu'a and na'u make it possible to ask questions about mekso operators, even though there is no specific cmavo for an operator question, nor is it grammatical to utter an operator in isolation. Consider Example 18.131, to which Example 18.132 is one correct answer:

Example 18.131. 

lirena'u
The-numbertwoapplied-to-selbri
moredulivo
which-selbri?twoequalsthe-numberfour.
2 ? 2 = 4

Example 18.132. 

nu'asu'i

plus


In Example 18.131, na'u mo is an operator question, because mo is the selbri question cmavo and na'u makes the selbri into an operator. Example 18.132 makes the true answer su'i into a selbri (which is a legal utterance) with the inverse cmavo nu'a. Mechanically speaking, inserting Example 18.132 into Example 18.131 produces:

Example 18.133. 

lirena'unu'a
The-numbertwo(the-operatorthe-selbri
su'iredulivo
plus)twoequalsthe-numberfour.

where the na'u nu'a cancels out, leaving a truthful bridi

Numerical free modifiers, corresponding to English firstly, secondly, and so on, can be created by suffixing a member of selma'o MAI to a digit string or a lerfu string. (Digit strings are compound cmavo beginning with a cmavo of selma'o PA, and containing only cmavo of PA or BY; lerfu strings begin with a cmavo of selma'o BY, and likewise contain only PA or BY cmavo.) Here are some examples:

Example 18.134. 

pamai

firstly


Example 18.135. 

remai

secondly


Example 18.136. 

romai
all-ly

lastly


Example 18.137. 

ny.mai

nth-ly


Example 18.138. 

pasomo'o

nineteenthly (higher order)

Section 19


The difference between mai and mo'o is that mo'o enumerates larger subdivisions of a text. Each mo'o subdivision can then be divided into pieces and internally numbered with mai. If this chapter were translated into Lojban, each section would be numbered with mo'o. (See Section 18.1 for more on these words.)

A numerical tense can be created by suffixing a digit string with roi. This usage generates tenses corresponding to English once, twice, and so on. This topic belongs to a detailed discussion of Lojban tenses, and is explained further in Section 18.1.

Note: the elidable terminator boi is not used between a number and a member of MAI or ROI.