A General Theory of Combinatoriality and the Aggregate (Part 2)
Daniel Starr, Robert Morris · Perspectives of New Music · 1978
A CM-column defines a collection of row-segments belonging to different rows. These segments are internally ordered, but their alignment with respect to one another, has not been specified, except so as to define an aggregate. One might divide such a column into subcolumns of fewer than 12 PCs, and thereby specify the vertical alignment and proximity of PCs in greater detail. This process might be shown by inserting dotted vertical lines: