数学公式的英语读法
[*]
12
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 x≤y
x is less than or equal to y
0 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!
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:S→T
a function f from S to T
x→y
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 x→0
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
页:
[1]