Item #29297 Two-Way Communication Channels. Claude E. Shannon, Elwood.
The offprint?? issue

Two-Way Communication Channels

Berkeley, CA: University of California Press 1961. 611-644 pages. 10 1/16 x 6 3/4 inches. Stapled self-wrappers. Creased, some minor soiling. Very Good. Wraps. [29297]

The Proceedings of the Fourth Berkeley Symposium Probability and Statistics first published this paper. The construction of this item leaves us a little unsure of its intended use. It could be an offprint, but it lacks the usual separate wrapper or reprint statement. It could also be stapled, trimmed extracts from the Symposium’s preprints or transactions. The layout and details appear the same as the digitalized Proceedings. Regardless, it is the form of the paper that Shannon was distributing when requested. Lacking any additional information, and realizing it was in the author's personal files, we lean toward it being an offprint for the author's use.

"...The problem is to communicate in both directions through the channel as effectively as possible. Particularly, we wish to determine what pairs of signaling rates R1 and R2 for the two directions can be approached with arbitrarily small error probabilities..." (introduction)

PROVENANCE: The personal files of Claude E. Shannon (unmarked). There were multiple examples of this item in Shannon's files.

Sloane and Wyner, "Claude Elwood Shannon Collected Papers," #119
Hook and Norman, "Origins of Cyberspace," #899
Reprinted in D. Slepian, editor, "Key Papers in the Development of Information Theory," IEEE Press, NY, 1974, pp 339-372
Proceedings Fourth Berkeley Symposium Probability and Statistics, June 20 - July 30, 1960, edited by J. Neyman, Univ. Calif. Press, Berkeley, CA, Vol. 1, 1961, pp. 611-644

Price: $75.00

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