string duality
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string duality
[¦striŋ dü′al·əd·ē] (particle physics)
The property of superstring theories that the strongly coupled behavior of each theory appears to be equivalent to that of some other weakly coupled system, and all the seemingly different superstring theories, as well as M-theory, are just different weakly coupled limits of a single theory.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.