Publication 1840

Varela F. J. (1975) A calculus for self-reference. International Journal of General Systems 2: 5–24. Fulltext at
An extension of the calculus of indications (of G. Spencer Brown) is presented to encompass all occurrences of self-referential situations. This is done through the introduction of a third state in the form of indication, a state seen to arise autonomously by self-indication. The new extended calculus is fully developed, and some of its consequences for systems, logic and epistemology are discussed.


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