Fengshi

Why does the formula lack the $ symbol after OCR, making it unable to render in the md editor?

1

### 📚 The doc issue  The formula for identifying academic papers is: [ \begin{aligned} \vec{OD} &= (XI - XO, YI - YO) = \ &= \left( \frac{\sum_{i=1}^{n} (I_i)}{\sum_{i=1}^{n} P_i},...