te'o zei dugri zei-lujvo

d1 is the natural logarithm of d2.

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

On affix form:

dugri
x1 is the logarithm of x2 with base x3.
stero
x1 is x2 steradian(s) [metric unit] in solid angle (default is 1) by standard x3.
zekri
x1 (event/state) is a punishable crime/[taboo/sin] to people/culture/judges/jury x2.

In definition:

cmapagjvo
x1 (text) is a lujvo with meaning x2 and arguments x3, and which is constructed from tanru/veljvo x4 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
x1 (text) is a Lojban compound predicate using the particle “zei”; with meaning x2, arguments x3, built from metaphor (tanru) x4.
luvrzei
x1 (text) is a Lojban compound predicate using the particle “zei”; with meaning x2, arguments x3, built from metaphor (tanru) x4.
zeiljvo
x1 (text) is a Lojban compound predicate using the particle “zei”; with meaning x2, arguments x3, built from metaphor (tanru) x4.
zo si si zei fa'o
x1 is a nonsense zei-lujvo using parts x2, silly by standard x3.

In notes:

dekydugri
du1 is the common logarithm (base 10) of du2.
pavnondugri
d1 is the common logarithm (base 10) of d2.
reldugri
d1 is the binary logarithm of d2.
tezyfrinu
x1 is a fraction with x2 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; (X3 / (1 + e^(-X.
te'o'a (exp!)
unary mekso operator: natural exponentiation operator exp, where exp(a) = ea \forall a.
xi'i'ei (exp!)
digit/number: Khinchin's constant K0 = 2.6854520010…