mathematical ordered n-ary operator: (pointwise) functional left composition; X1 \circ X.
Inputs must be appropriate functions; this outputs a function; follow by "ku'e (boi)" in order to include/apply the output function to arguments (thereby producing a number). a1 \circ a= a1(a for any positive integer or countable infinity n and functions ai for all integer i < n+1. Replaces all of the inputs with a (possibly stripped, as appropriate) tuple; for replacing a single argument in a multivariate function with a function (either evaluated or not), use (partial) (e)valuation. Left compose multiple terms by separating the function names with "boi".