fTriangle S
Definition 3.1 in [BW1] defines the fTriangle, a generalisation of the fVector, to have entries $f#(i,j)$ equal to the number of faces of $S$ with degree $i$ and dimension $j1$. The degree of a face is the dimension of the largest face of $S$ containing it, plus one.
If $S$ is pure, then the last row is the traditional fVector and the remainder is zeros.



The object fTriangle is a method function.