##### 勒贝格积分基础运算 - 勒贝格积分基础运算 - 线性 - $\displaystyle \int_X (af + bg) \text{d}\mu = a \int_X f \text{d}\mu + b \int_X g \text{d}\mu$ - 单调性 - $\displaystyle \int_X f \text{d}\mu \leq \int_X g \text{d}\mu$ - 绝对值不等式 - $\displaystyle \left| \int_X f \text{d}\mu \right| \leq \int_X |f| \text{d}\mu$