Ancient Greek
ΠΡΟΣ ΜΑΘΗΜΑΤΙΚΟΥΣ
Sextus Empiricus, Adversus mathematicos 112
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δισσοῦ οὖν ὄντος τοῦ α καὶ ι καὶ υ οὐ- κέτι ἑπτὰ γενήσεται μόνον στοιχεῖα φωνάεντα, ὧν δύο μὲν μακρά, τό τε η καὶ τὸ ω, δύο δὲ βραχέα, τὸ τε ε καὶ τὸ ο, τρία δὲ δίχρονα, τό τε α καὶ ι καὶ υ, ἀλλὰ τὰ σύμπαντα δέκα, καὶ τούτων τὰ πέντε μὲν μακρά, τό τε η καὶ τὸ ω καὶ τὸ μακρὸν α καὶ ι καὶ υ, ἰσάριθμα δὲ τὰ βραχέα, τὸ ο καὶ τὸ ε καὶ τὸ βραχὺ α καὶ ι καὶ υ.