What does this symbol mean? It’s in Stephanus, p. 45 line 1.
I don’t see anything on pg. 45 of the Hayduck edition, or pg. 45 by his folio numbering. I do see this on pg. 44, though I don’t know if that’s what you’re talking about.

It brings back, fresh in my mind, the most useful day of undergrad mathematics, where we learned about the converse of a statement, and the contrapositive and so on, a quarter century ago. I don’t remember precisely what he drew on the blackboard to illustrate everything – he was a big black professor, head of the department then, whose name escapes me now, specialty numerical approximation, I think – but it would have looked about like that, I suspect.
the first line on p. 45 reads: φοράν τινα ἔχουσιν χἰ προσδιωρισμέναι etc. So what is this symbol?ok sorry it is just bad print, it is aἰ