1 on affix 5 in notes

ne'o _VUhU3 cmavo

unary mathematical operator: factorial; a!.

• jbovlaste

On affix form:

cnebo

x₁ is a/the neck [body-part] of x₂; [metaphor: a relatively narrow point].

In notes:

fampi'i

x₁ is the factorial of x₂.

ma'oi'e (exp!)

Like "ma'oi" but outputs the officially-designated/canonical sub-selma'o (if any) to which the immediately following and quoted word (cmavo) belongs, otherwise outputting the whole relevant selma'o in fashion equivalent to "ma'oi".

ne'o'a (exp!)

mekso ternary operator: the generalized incomplete (factorial-extending) Pi function; for input (X_{1, X} this word outputs the definite integral of t^X_{1 e^-t} with respect to t from X₂ to X₃ (see notes for default values).

ne'o'au (exp!)

mekso quaternary operator: polygamma function; for input X_{1, X}, outputs the (-X₂₎th derivative of Log(ne'o'a(X_{1, X})) with respect to X₁.

ne'o'o (exp!)

mekso quaternary operator – Pochhammer symbol: with/for input (X_{1, X}, this word/function outputs \prod_k = 0^X_{2 - 1 (X}; by default, X₄ = 1 unless explicitly defined otherwise.