Much of the fluidity and tonal surface in his music is closely related to his skillful play with collectional
invariances and his full exploration of the chromatic space through the pentatonic path.
1g shows, coinciding with the arrival on D is a distinct shift in the collectional resources, and the most appropriate matrix is now that of sum 6 (or 0).
6 offers a starting-point for an alternative analysis of this movement in which the structural overlay is less a matter of linear coherence than intervallic and collectional interaction.
These transpositional changes, and most of the other collectional
"modulations" throughout the piece, are characteristically abrupt.
 The modification to definitions VC and VIC constrains their collectional
reference to the C formed with the n(set) in [IVC.sub.h].
Mazzola treats modulation purely as a matter of changing collectional