Walter Pitts and “A Logical Calculus”
 Mark Schlatter,
 Ken Aizawa
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Many years after the publication of “A Logical Calculus of the Ideas Immanent in Nervous Activity,” Warren McCulloch gave Walter Pitts credit for contributing his knowledge of modular mathematics to their joint project.
In 1941 I presented my notions on the flow of information through ranks of neurons to Rashevsky’s seminar in the Committee on Mathematical Biology of the University of Chicago and met Walter Pitts, who then was about seventeen years old. He was working on a mathematical theory of learning and I was much impressed. He was interested in problems of circularity, how to handle regenerative nervous activity in closed loops....For two years Walter and I worked on these problems whose solution depended upon modular mathematics of which I knew nothing, but Walter did. (McCulloch 1989, pp. 35–36, cf. McCulloch, 1965a, pp. 9–10).
In this paper, we will fill in some of the details regarding Pitts’s interest in problems of circularity, regenerative activity in closed loops of neurons, and modular mathematics, and the way in which they relate to “A Logical Calculus.”
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 Title
 Walter Pitts and “A Logical Calculus”
 Journal

Synthese
Volume 162, Issue 2 , pp 235250
 Cover Date
 20080501
 DOI
 10.1007/s1122900791829
 Print ISSN
 00397857
 Online ISSN
 15730964
 Publisher
 Springer Netherlands
 Additional Links
 Topics
 Keywords

 McCulloch
 Pitts
 Cybernetics
 Logical Calculus
 Industry Sectors
 Authors

 Mark Schlatter ^{(1)}
 Ken Aizawa ^{(2)}
 Author Affiliations

 1. Department of Mathematics, Centenary College, 2911 Centenary Boulevard, Shreveport, LA, 77134, USA
 2. Department of Philosophy, Centenary College, 2911 Centenary Boulevard, Shreveport, LA, 77134, USA