Note 4 — Chapter XXVIII · THEÆTETUS.
Reading edition
Plato, Theætêt. p. 148. Oblong (προμήκεις) numbers are such as can be produced only from two unequal factors. The explanation of this difficult passage, requiring us to keep in mind the geometrical conception of numbers usual among the Greek mathematicians, will be found clearly given in Mr. Campbell’s edition of this dialogue, pp. 20-22.