He was also a Member - at - Large of the Council of the American Mathematical Society .
During sabbaticals and leaves he also spent time at the Institute for Advanced Study and at Churchill College , Cambridge ( where he was a Fulbright Fellow ) .
Fulbright Fellow was also a Member - at - Large of the Council of the American Mathematical Society .
During sabbaticals and leaves he also spent time at the Institute for Advanced Study and at Churchill College , Cambridge ( where he was a Fulbright Fellow ) .