# Varadhan's visit to Trondheim

On Thursday 24 May Srinivasa S. R. Varadhan travelled to Trondheim where he gave a lecture at the Norwegian University of Science and Technology (NTNU). Varadhan also visited a math circus in the town centre where hundreds of children turned up to meet him.

After three days of celebrations in Oslo the Abel Laureate Srinivasa S. R. Varadhan headed for Trondheim where he was received at the airport by Trond Digernes, mathematics professor at the Norwegian University of Science and Technology, who had previously collaborated with Varadhan.

At the Norwegian University of Science and Technology the Abel Laureate was welcomed by Rector Torbjørn Digernes before delivering his lecture "Scaling limits of Large Interacting systems". Abstract: We shall examine through examples how the macroscopic behavior of large interacting systems can be predicted from their microscopic laws of interaction and how the theory of large deviations plays a role in it. The lecture was well attended by both academic staff and students.

After the university lecture Professor Varadhan was invited to meet schoolchildren at a math circus in the town center organized by the Norwegian Centre for Mathematics Education. Ingvill Merete Stedøy-Johansen, "math circus director" and several hundred schoolchildren were waiting eagerly to meet the Abel Laureate. It is not every day that the opportunity to ask questions to such a distinguished mathematician occurs, and the schoolchildren in Trondheim certainly knew how to make the most of it.

In the evening Rector Torbjørn Digernes gave a dinner in honour of Abel Laureate Srinivasa S. R. Varadhan at Lerchendal gård. Among the invited guests were members of the Abel committee and the Abel board.