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What does 'a reduction is tight' mean rigorously?
asked Feb 6 at 6:03
Let $W$ be well-ordered and $f$ increasing. If $z$ is the smallest $x$ such that $f(x)<x$, why does $f(f(z))<f(z)$?
asked Jan 22, 2021 at 15:39
No answers with score of 5 or more