User Lee Seungwoo - Cryptography Meta Stack Exchange

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Lee Seungwoo

Member for 10 months
Last seen more than a month ago

South Korea

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9

What does 'a reduction is tight' mean rigorously?

5

Let $W$ be well-ordered and $f$ increasing. If $z$ is the smallest $x$ such that $f(x)<x$, why does $f(f(z))<f(z)$?