Non-technical Papers of David J. Thouless relating to the University of Washington, 1993 Contains non-technical correspondence of David J. Thouless in relation to his time at the University of Washington. Previously stored within a hanging file, these papers have been placed into chronological order. Contains the following: Correspondence from Ruedi Seiler to Thouless concerning algebraic equations and calculations - dated June 1993. Correspondence received by Thouless and Seiler from Yosi [Avron] concerning the Index approach and other observations - dated November 1993. June 1993-November 1993