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For questions concerning limit superior and limit inferior of sequences (of real numbers and various generalizations) and also for $\limsup$ and $\liminf$ of sequences of sets.

2 votes

Comparing two limsup's

Assuming lots of stuff, just to get the ball rolling: $$\frac{1}{f(x)}\int_{x}^{\infty}f^{2}(t)dt=\frac{1}{xf(x)}\frac{\int_{0}^{\frac{1}{x}}f^{2}(\frac{1}{t})\frac{1}{t^{2}}dt}{\frac{1}{x}}.$$ So …
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