常用的数学符号和公式的英文表示法_图文

常用的数学符号和公式的读法 数学公式的读法(Pronunciation of mathematical expressions) 1 逻辑(Logic) ? for all p? q if p, then q p?q p if and only if q 2 集合(Sets) x?A x?A x belongs to A x does not belong to A A?B A is a subset of B A?B B is a subset of A A?B A cap B A?B A cup B 3 实数(Real numbers) x+1 x-1 x±1 xy x y x plus one x minus one x plus or minus one xy / x multiplied by y x over y x equals 5 / x is equal to 5 x (is) not equal to 5 x=5 x≠5 3 实数(Real numbers) x>y x is greater than y x≥y x is greater than or equal to y x< y x is less than y x?y x is less than or equal to y 0<x<1 zero is less than x is less than 1 0?x?1 zero is less than or equal to x is less than or equal to 1 |x| mod x / modulus x x2 x squared / x (raised) to the power 2 x3 x cubed; the third power of x x4 x to the fourth / x to the power four xn x to the nth / x to the power n x-n x to the (power) minus n 3 实数(Real numbers) n! n factorial (x+y)2 x plus y all squared the sum from i equals one to n ai a ? i i ?1 n ?x? ? ? y? ? ? ? 2 x over y all squared a ? b : a is proportional to b 1 a ? : a is inversely proportional to b b a ? ??(??) : a approaches the limit plus (minus ) infinity a : square root of a 3 n a : cube root of a a : nth root of a e x : exponential function of x 4 函数(Functions) f(x) f : S→T x? y f?(x) f?(x) f??(x) f??? (x) fx / f of x / the function f of x a function f from S to T x maps to y f prime x f double–prime x f triple–prime x the fourth derivative of f with respect to x ? f ( x)dx : integral of the ?? : double integral of ??? : triple integral of ? ? : n fold integral of a b function of x, between the limits a and b dy : derivative of y respect to x dx ?y : partial derivative of y respect to x ?x d2y : second derivative of y respect to x 2 dx ?X i ?1 n i ?1 n i : summation of x sub i, where i goes from 1 to n : product of x sub i, where i goes from 1 to n ?X i ? ? ? ? ? ? ? ? ? ? ? ? ? 常量:constant 变量:variable 极限:limit 无穷大:infinity 无穷小:infinitesimal 极大:maximum 极小:minimum 微分:differential 积分:integral 导数:derivative 特解:particular/special solution 通解:general solution 全解:complete solution ? ? ? ? ? ? ? ? ? ? ? ? ? 矩阵:matrix 行矩阵: row matrix 列矩阵:column matrix 单位阵:unit matrix 对角阵:diagonal matrix 逆矩阵:inverse matrix 转置矩阵:transposed matrix 向量: vector 标量: scalar 概率: probability 随机变量: random variable 均值:mean 方差:variance

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