"Magnitudes have all the characteristics Plato attributes to Apeiron."
p. 394
Socratic, Platonic and Aristotelian Studies: Essays in Honor of Gerasimos Santas 2011
https://www.google.com/books/edition/Platon_und_Aristoteles_sub_ratione_verit/d-XBHKpMNEUC?hl=en&gbpv=1&dq=inauthor:%22Wolfgang+Wieland%22&printsec=frontcover
"Aristotle argues....if the units in the first Two come into being simultaneously, then they can not be ordered as prior and posterior, as the hypothesis of non-comparability [of Platonic Forms] implies."p. 15... "he [Aristotle] argues it is impossible that two be some nature separated from two units....Here he is raising the difficulty of how Platonic Form numbers can exist separately (actually) apart from the units that constitute them...How can a number like 2 be a unity?...a collection is not an entity over and above its members."
The metric system is for physical quantities and measurable distances, not time: "points in time are not units."
Noncommutative origin of the Pythagorean Comma.
https://en.wikipedia.org/wiki/Pythagorean_comma
Apotome and limma are the two kinds of semitones defined in Pythagorean tuning. Namely, the apotome (e.g. from C to C♯) is the chromatic semitone, or augmented unison (A1), while the limma (e.g. from C to D♭) is the diatonic semitone, or minor second (m2).
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