This date corresponds to Safar 415 A.H. when Ibn al-Haytham wrote a copy of Apollonius' Conics. The existence of this copy, found in Aya Sofya (MS Aya Sofya 2762, 307 fob.), demonstrates Ibn al-Haytham's deep engagement with classical mathematics and geometry. It provides insight into his scholarly activities during this period and his dedication to preserving and studying important mathematical texts.
