Department of theoretical physics and astronomy is located at 42 Pastera str.; the conference will be held in the "Large Physical Audience", 25 Pastera str. (enterence from the courtyard); the main building of Odessa National University is located at 2 Dvoryanskaya St. (see map below).

There are reliable taxi companies like the internationally know UBER or the local “BOND” (https://bond.od.ua), tel. +38048 7007007; "Star Taxi" (https://startaxi.od.ua).

Or you can use public transportation.

Transportation from the airport:

The airport is about 8 km away from downtown Odessa, a taxi drive costing about  100 UAH (< 4 USD).

Public transport available is marked on the map. The most convenient (but not the fastest) choice is by bus No.117.  

Transportation from the railway station:

The railway station is relatively not far from the destination (the transoprtation map). The most convenient choice is by bus No.145.