1.π (Pi; periphery/周长) March 14 marks Pi Day, the holiday commemorating the mathematical constant π (pi), written numerically as 3.141592+. Since mathematic notation is a language that uses symbols from a multitude of alphabets and typefaces, it seem…
参考: Write math and make a box with alltt environment LaTex Verbatim 环境下使用数学符号 在 Verbatim 环境下使用数学符号,需要借助额外的宏包,fancyvrb.例如: \documentclass{article} \usepackage{fancyvrb} \begin{document} \begin{Verbatim}[commandchars=\\\{\}, codes={\catcode`\$=3\catcod…
1.#{}表示一个占位符号,通过#{}可以实现preparedStatement向占位符中设置值,自动进行java类型和jdbc类型转换,#{}可以有效防止sql注入. #{}可以接收简单类型值或pojo属性值. 如果parameterType传输单个简单类型值,#{}括号中可以是value或其它名称. 使用#传入参数是,sql语句解析是会加上"",比如 select * from table where name = #{name} ,传入的name为小李,那么最后打印出来的就是…
argument of the maximum/minimum arg max f(x): 当f(x)取最大值时,x的取值 arg min f(x):当f(x)取最小值时,x的取值 表示使目标函数取最小值时的变量值From Wikipedia In mathematics, arg max (or argmax) stands for the argument of the maximum, that is to say, the set of points of the given argum…
基本运算 乘法 x×y x \times y 乘方 23x 2^{3x} 平方根 x+y−−−−−√ \sqrt {x + y} 除法 x÷y x \div y 分数 xy \frac{x}{y} 异或 ⊕ \oplus 小于或等于 x≤y x \leq y 大于或等于 x≥y x \geq y 不等于 x≠y x \neq y 向下取整 ⌊x⌋ \lfloor x \rfloor 向下取整 ⌈x⌉ \lceil x \rceil 求和 ∑x=1n7x \sum\limits_{x = 1}^{…
\mathrm is the normal upright Roman font \mathnormal is the normal math italic font: $\mathnormal{a}$ and $a$ give the same result \mathcal is the special calligraphic font for uppercase letters only \mathbf gives upright Roman boldface letters \math…