常用数学公式英语表述.doc

 HYPERLINK /share3342510922 \l nogo#nogo 常用的数学英语表述 1.Logic?????????? ??????????? there exist ??????????? for all p?q?????????? p implies q / if p, then q p?q?????????? p if and only if q /p is equivalent to q / p and q are equivalent 2.Sets?????????? x∈A?????????? x belongs to A / x is an element (or a member) of A x?A?????????? x does not belong to A / x is not an element (or a member) of A A?B?????????? A is contained in B / A is a subset of B A?B?????????? A contains B / B is a subset of A A∩B?????????? A cap B / A meet B / A intersection B A∪B?????????? A cup B / A join B / A union B A\B?????????? A minus B / the diference between A and B A×B?????????? A cross B / the cartesian product of A and B 3. Real numbers?????????? x+1?????????? x plus one x-1?????????? x minus one x±1?????????? x plus or minus one xy?????????? xy / x multiplied by y ????????? (x - y)(x + y)?????????? x minus y, x plus y ????????? x y?????????? x over y =?????????? the equals sign x = 5?????????? x equals 5 / x is equal to 5 x≠5?????????? x (is) not equal to 5 x≡y?????????? x is equivalent to (or identical with) y x ≡ y?????????? x is not equivalent to (or identical with) y 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 x 2?????????? x squared / x (raised) to the power 2 x 3?????????? x cubed x 4?????????? x to the fourth / x to the power four x n?????????? x to the nth / x to the power n x ?n?????????? x to the (power) minus n x?????????? (square) root x / the square root of x x 3?????????? cube root (of) x x 4?????????? fourth root (of) x x n?????????? nth root (of) x ( x+y ) 2?????????? x plus y all squared ( x y ) 2?????????? x over y all squared n!??????????