https://maistrelis.com/en/social/notes/NotesenKostas MaistrelisKostas MaistrelisWed, 15 Jul 2026 20:11:44 +0000https://maistrelis.com/en/social/kostas_en/01kxkpg7s0gpwcsg420mrbrb6j/Wed, 15 Jul 2026 20:11:44 +0000Kostas Maistrelishttps://maistrelis.com/en/social/kostas_en/01kxkpg7s0gpwcsg420mrbrb6j/<p>A short introduction/reminder to the concept of the derivative</p> <p><a href="https://maistrelis.com/en/articles/eisagogi-paragogos/">https://maistrelis.com/en/articles/eisagogi-paragogos/</a> </p>