Travel
Airports. The closest airport is in Hannover, but the large airports in Hamburg, Frankfurt (Main), and Berlin are also fairly accessible via train from Göttingen.
Train. Göttingen is well connected to most major cities in Germany via fast trains. The travel time from Frankfurt is about 2h and from Hannover less than 1h.
Local. Walking from the train station to the Mathematical Institute takes no more than 20 minutes passing through the town centre. Most hotels are in walking distance from the main building, however there is also a chance of using the buses.
Hotels
Here is a list of recommended Hotels in Göttingen:
Leine Hotel
Eden Hotel
Hotel Central
Four Points Flex by Sheraton
Novostar
Hotel Stadt Hannover
Leine Hotel
Eden Hotel
Hotel Central
Four Points Flex by Sheraton
Novostar
Hotel Stadt Hannover
Map
Here is a map where you can find bus stops, sightseeing points and other information about Göttingen. The link shows the Sitzungszimmer, in which the talks will take place.