cu'a _VUhU3 cmavo

unary mathematical operator: absolute value/norm |a|.

On affix form:

cuxna: x₁ chooses/selects x₂ [choice] from set/sequence of alternatives x₃ (complete set).

nacnilbra: x₁ is the absolute value/norm of x₂.
cu'ai (exp!): binary mathematical operator: vector norm/magnitude of vector a in structure (normed vector space) b.
gu'au'i: mekso operator, variable arity - algebraic structure order of X1; OR: order of/(size of) period of element X1 in algebraic structure X2 under operator/of type X3
ka'au (exp!): mekso unary operator: cardinality (#, | |)
sei'au: terbri editor: passes the terbri value through the quoted function so that the sumti that fills it really is filling the output of the function
cu'alni: x₁ is the absolute value of x₂
cu'alvu'u: x₁ is the absolute difference of numbers x₂ and x₃ ; x₁= |x_{2 - x}