My discussion is divided into six sections. In the first I provide some background to the form-in-matter problem in Aristotle; the second focusses on Alexander's solution to the problem; in the third, we consider Plotinus' contribution; in the fourth, there's brief treatment of the problem by the commentators on the Categories; and finally in the fifth section I look at what I call the 'Lucius problem' - this pertains directly to the substantial qualities doctrine, and it reveals, I suggest, how Alexander's way of solving the form-in-matter problem contributes to the breakdown of Aristotelian categories. In the sixth section I suggest how the two issues are connected.
Ellis, John O., "Alexander on Form-in-Matter and the Breakdown of Aristotle's Categories" (1992). The Society for Ancient Greek Philosophy Newsletter. 180.