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数学公式的英语读法

作者:未知 来源:本站原创 发布时间:2009年05月31日 点击数: 【字体: 收藏 查看评论
1.Logic
there exist
for all
pq p implies q / if p, then q
pq p if and only if q /p is equivalent to q / p and q are equivalent
2.Sets
xA x belongs to A / x is an element (or a member) of A
xA x does not belong to A / x is not an element (or a member) of A
AB A is contained in B / A is a subset of B
AB A contains B / B is a subset of A
AB A cap B / A meet B / A intersection B
AB 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
x5 x (is) not equal to 5
xy 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
xy x is greater than or equal to y
x < y x is less than y
xy x is less than or equal to y
0 < x < 1 zero is less than x is less than 1
0x1 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! n factorial
x ^ x hat
x ¯ x bar
x ˜ x tilde
x i xi / x subscript i / x suffix i / x sub i
i=1 n a i the sum from i equals one to n a i / the sum as i runs from 1 to n of the a i
4. Linear algebra
x the norm (or modulus) of x
OA OA / vector OA
OA ¯ OA / the length of the segment OA
A T A transpose / the transpose of A
A 1 A inverse / the inverse of A
5. Functions
f( x ) fx / f of x / the function f of x
f:ST a function f from S to T
xy x maps to y / x is sent (or mapped) to y
f'( x ) f prime x / f dash x / the (first) derivative of f with respect to x
f''( x ) f double-prime x / f double-dash x / the second derivative of f with respect to x
f'''( x ) triple-prime x / f triple-dash x / the third derivative of f with respect to x
f (4) ( x ) f four x / the fourth derivative of f with respect to x
f x 1 the partial (derivative) of f with respect to x1
2 f x 1 2 the second partial (derivative) of f with respect to x1
0 the integral from zero to infinity
lim x0 the limit as x approaches zero
lim x 0 + the limit as x approaches zero from above
lim x 0 the limit as x approaches zero from below
log e y log y to the base e / log to the base e of y / natural log (of) y
lny log y to the base e / log to the base e of y / natural log (of) y
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