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Letters to the editor |
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| Authors: | Steven H Weintraub Herbert A Simon Saunders Mac Lane |
| Institution: | 1. Mathematisches Institut, Universit?t Bayreuth, D-8580, Bayreuth, Federal Republic of Germany 2. Department of Computer Science and Psychology, Carnegie Mellon University, 15213, Pittsburgh, PA, USA 3. Department of Mathematics, University of Chicago, 60637, Chicago, IL, USA |
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