tomgooo

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好的,我可以提供一份以前的数学公式相关文章,这在Markdown编辑器里可以非常直观地阅览 # 归结原则(海涅(Heine)定理) ## 定理内容: ![[公式]](https://www.zhihu.com/equation?tex=%5Clim_%7Bx%5Crightarrow+x_0%7Df%28x%29%3DA%5CLeftrightarrow%5Cforall+x_n%5Crightarrow+x_0%28n%5Crightarrow+%5Cinfty%29%E6%81%92%E6%9C%89%5Clim_%7Bn%5Crightarrow%5Cinfty%7Df%28x_n%29%3DA+) ## 证明: ![[公式]](https://www.zhihu.com/equation?tex=%28%5CRightarrow%29) 必要性: 由极限定义可得: ![[公式]](https://www.zhihu.com/equation?tex=for+%5Cforall+%5Cvarepsilon%3E0%2C%5Cexists%5Cdelta%3E0%2Cwhen0%3C%7Cx-x_0%7C%3C%5Cdelta%2C%7Cf%28x%29-A%7C%3C%5Cvarepsilon) 由数列极限可知:对于上述 ![[公式]](https://www.zhihu.com/equation?tex=%5Cdelta) ,存在 ![[公式]](https://www.zhihu.com/equation?tex=N) ,当 ![[公式]](https://www.zhihu.com/equation?tex=n%3EN+) 时 ![[公式]](https://www.zhihu.com/equation?tex=0%3C%7Cx_n-x_0%7C%3C%5Cdelta) ,所以 ![[公式]](https://www.zhihu.com/equation?tex=%7Cf%28x_n%29-A%7C%3C%5Cvarepsilon) ,由此可得 ![[公式]](https://www.zhihu.com/equation?tex=%5Clim_%7Bn%5Crightarrow%5Cinfty%7Df%28x_n%29%3DA) ------ ![[公式]](https://www.zhihu.com/equation?tex=%28%5CLeftarrow%29) 充分性: **条件**: ![[公式]](https://www.zhihu.com/equation?tex=%5Cforall+x_n%5Crightarrow+x_0%28n%5Crightarrow+%5Cinfty%29%E6%81%92%E6%9C%89%5Clim_%7Bn%5Crightarrow%5Cinfty%7Df%28x_n%29%3DA+) **结论**:...

**当页面比例 80% 时,能完整显示所有月份,100% 或更高时右侧月份显示不全** :-)