Pontryagin was strongly influenced by Aleksandrov and the direction of Aleksandrov 's research was to determine the area of Pontryagin's work for many years. However this was as much to do with Aleksandrov himself as with his mathematics (and):
Matindi ang Pontryagin ay naiimpluwensyahan ng Aleksandrov at ang mga utos ng Aleksandrov 's pananaliksik ay upang matukoy ang mga lugar ng Pontryagin ng trabaho para sa maraming taon. Subalit ito ay bilang marami ang gagawin sa Aleksandrov kanyang sarili bilang sa kanyang matematika (at):