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The Griffiths inequality for critical exponents says $$\alpha+\beta(1+\delta) \geq 2$$

I have looking for the internet for a full derivation but couldn't find anything.

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    $\begingroup$ sciencedirect.com/topics/computer-science/critical-exponent “We now proceed to establish the Griffiths inequality.” $\endgroup$
    – G. Smith
    May 20 at 5:16
  • $\begingroup$ Can you give a bit more context/detail and define what each of the variables are? $\endgroup$ May 20 at 5:17
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    $\begingroup$ As suggested by @G.Smith, a derivation can be found, for instance, in the book by Pathria and Beale (p. 439-441 in the third edition). $\endgroup$ May 20 at 5:49