As an undergraduate he had already met Pelageia Polubarinova and the two found that they had much in common, for Kochin's research was on meteorology, gas dynamics and shock waves in compressible fluids.
Bilang isang undergraduate niya na matugunan Pelageia Polubarinova at ang dalawang natagpuan na sila ay marami sa karaniwan, para sa Kochin ng pananaliksik ay sa meteorolohiya, gas dinamika at shock waves sa napipiga fluids.