Elias M. Stein

"What I like about mathematics is the interplay with other people. And that generates extra energy — because it really helps you think."

"Working with Eli Stein is amazing. There are good teachers and there are great teachers — and then there is Eli. He was simply the best teacher, I believe, of advanced math, I believe, in the whole world, by far. ... he conveyed a spirit of optimism. ... He has a wonderful style of explaining math — in which almost all of the effort of explanation goes into finding the right point of view and getting the essence of the problem."

"That geometric considerations enter in a decisive way in many questions of harmonic analysis is by now a well-known fact. In explicit form such ideas arose first in the estimation of the of surface-carried measure; they have since played a key role in averages over lower-dimensional varieties, restriction theorems, in connection with the study of s and Fourier integral operators, and in application to linear and non-linear s."