d_{1} is the natural logarithm of d_{2}.

See also te'o, dugri, reldugri, pavnondugri.

- dugri
- x
_{1}is the logarithm of x_{2}with base x_{3}. - stero
- x
_{1}is x_{2}steradian(s) [metric unit] in solid angle (default is 1) by standard x_{3}. - zekri
- x
_{1}(event/state) is a punishable crime/[taboo/sin] to people/culture/judges/jury x_{2}.

- cmapagjvo
- x
_{1}(text) is a lujvo with meaning x_{2}and arguments x_{3}, and which is constructed from tanru/veljvo x_{4}such that each element of the veljvo is ultimately only a cmavo (including "{zei}", "{ke}"/"{ke'e}", "{bo}", etc.), gismu, or rafsi of such cmavo or gismu. - zejvo
- x
_{1}(text) is a Lojban compound predicate using the particle “zei”; with meaning x_{2}, arguments x_{3}, built from metaphor (tanru) x_{4}. - luvrzei
- x
_{1}(text) is a Lojban compound predicate using the particle “zei”; with meaning x_{2}, arguments x_{3}, built from metaphor (tanru) x_{4}. - zeiljvo
- x
_{1}(text) is a Lojban compound predicate using the particle “zei”; with meaning x_{2}, arguments x_{3}, built from metaphor (tanru) x_{4}. - zo si si zei fa'o
- x
_{1}is a nonsense zei-lujvo using parts x_{2}, silly by standard x_{3}.

- dekydugri
- du
_{1}is the common logarithm (base 10) of du_{2}. - pavnondugri
- d
_{1}is the common logarithm (base 10) of d_{2}. - reldugri
- d
_{1}is the binary logarithm of d_{2}. - tezyfrinu
- x
_{1}is a fraction with x_{2}divided by e (natural exponential base) - ka'o'ei
*(exp!)* - imaginary i, comma - spherical coordinates: first coordinate gives magnitude (complex modulus/radius) of the number, the second number gives the angle from the positive real axis measured counterclockwise toward the 'positive' imaginary axis (default: in the primary branch/Arg) as measured in some units (which that number should contain; the contextless default will suppose radians); the angle is not normalized.
- si'oi'e
*(exp!)* - n-ary mekso operator: Logistical growth/cumulative function, sigmoid function; (X
_{3 / (1 + e^(-X}. - te'o'a
*(exp!)* - unary mekso operator: natural exponentiation operator exp, where exp(a) = e
^{a \forall a}. - xi'i'ei
*(exp!)* - digit/number: Khinchin's constant K
_{0}= 2.6854520010…