압착정리(The Squeeze Theorem)

• $[\forall \epsilon>0 , a+\epsilon >0 ]\Leftrightarrow a\ge 0$

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• $\left[f(x) \le g(x) (0 < |x-a| < \delta_0) \ , \ \displaystyle \lim_{x \rightarrow a} f(x) =L \ , \ \displaystyle \lim_{x \rightarrow a} g(x) =M\right]\Rightarrow L\le M$

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• $\left[f(x) \le g(x) \le h(x) (0 < |x-a| < \delta_0) \ , \ \displaystyle \lim_{x \rightarrow a} f(x) =\lim_{x \rightarrow a} h(x)=L \right] \Rightarrow \displaystyle \lim_{x \rightarrow a} g(x)=L$

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