符号代码描述\(\sim\)$\sim$波浪号\(\sum\)$\sum$求和公式\(\sum_{i=0}^n\)$\sum_{i=0}^n$求和上下标\(\times\)$\times$乘号\(\pm\)$\pm$正负号\(\div\)$\div$除号$ \mid$$\mid$竖线\(\cdot\)$\cdot$点\(\circ\)$\circ$圈$\ast $$\ast $星号$ \bigotimes$$\bigotimes$克罗内克积\(\bigoplus\)$\bigoplus$异或\(\leq\)$\leq$小于等于\(\geq\)$\geq$大于等于$ \neq$$\neq$不等于\(\approx\)$\approx$约等于$ \prod$$\prod$N元乘积$ \...