Alexander Sergeyevich Esenin-Volpin (also written Ésénine-Volpine and Yessenin-Volpin in his French and English publications; ; May 12, 1924 March 16, 2016) was a Soviet-born American poet and mathematician. He was a known dissident, political prisoner and a leader of the Soviet human rights movement. He spent a total of fourteen years incarcerated and repressed by the Soviet authorities in prisons, psikhushkas and exile. He worked at Boston University.