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I have been studying the Exponential-Time Hypothesis, ETH, from this paper, there defined $s_k = \inf\{\delta \geq 0 | k\text{-}SAT \in RTIME[2^{\delta n}]\}$.

But in that paper's page number 10, I see this theorem, $s_k \leq (1 − \Omega(k^{−1}))s_{\infty}.$

My question is how to prove this theorem, is there any sources are available?

And is it also possible to prove $s_k$ strictly increases $(s_{k+1} > s_k)$ for an infinite number of the values of $k?$ What hypothesis do we need for this? And Why?

Any help or hints are most welcomed.

Helpful reference maybe this paper.

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  • $\begingroup$ Can you email the author to ask? $\endgroup$
    – Simd
    Feb 1 at 10:19
  • $\begingroup$ If there is no one in your department who can help, you will have to email one of those authors politely and ask. $\endgroup$
    – Simd
    Feb 1 at 10:27

1 Answer 1

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The partial answer existed in the paper, On the Complexity of k-SAT by Russell Impagliazzo and Ramamohan Paturi, 374 page, Theorem 3.

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