Tadeusz Iwaniec is Polish born mathematician who has held positions in the United States since 1983. He has made outstanding contributions to nonlinear analysis and geometric function theory including applications of the calculus of variations to mathematical models of elasticity theory. He has won many awards including the Wacław Sierpiński Medal in 2009.
Find out more at: https://mathshistory.st-andrews.ac.uk/Biographies/Iwaniec_Tadeusz/