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Reference
I am concerned that the book Li, Ming; Vitányi, Paul (February 1997) does not appear to Google Books to contain the phrase "chain rule". Can anyone give a page reference? Deltahedron (talk) 17:02, 4 May 2014 (UTC)[reply]
"Chain rule", as a term, does not appear in Li & Vitányi. They use conditional complexity to denote H(x|y), but that term isn't mentioned here. It's possible that the older sources might use this "chain rule" terminology, but it also might be the case of someone writing stuff in wikipedia in their own terminology. (It wouldn't be the first time I see that happen.) Similar expressions are called "chain rule" in other fields, most notably the chain rule about conditional probabilities. JMP EAX (talk) 12:38, 24 July 2014 (UTC)[reply]
Also, the book Thomas M. Cover; Joy A. Thomas (2006). Elements of Information Theory (2nd ed.). John Wiley & Sons. ISBN978-0-471-74881-6. uses "chain rule" aplenty for entropy etc., but never for Kolmogorov complexity. JMP EAX (talk) 14:01, 24 July 2014 (UTC)[reply]
