  Olympiodorus’ main influences in this commentary stem from Alexander of Aphrodisias, whom he cites frequently, and the views of Ammonius, which he was intimately familiar with. But Olympiodorus never refers to Philoponus. There are occasional references to certain unnamed people who proffered views Olympiodorus disagrees with (see e.g., 4,16; 7,22; 23,5.11.18.20), but it is difficult to trace these views back to Philoponus. The latter seems to have been of no concern to him. Shockingly, perhaps, Olympiodorus simply ignores relevant and important intellectual work that was carried out in his own lifetime, in the same ‘university’, and even the same ‘department’ by a man he must have known personally. To Olympiodorus and his disciples, as with Simplicius in Athens, John Philoponus was evidently persona non grata.