英文,常用数学符号、公式和等式的读法
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一、常用数学符号、公式和等式的读法
+
加号
,
加
plus
+
正号
positive
-
减号
,
减
minus
-
负号
,
负
negetive
±
加或减
plus or minus
± 正或负
plus or
minus
²
乘
multiplied by times into
÷ 除
divided by
:
比
proportional to
=
等号
equal sign
=
等于
to equal,to equals
>
大于
greater than
<
小于
less than
≣ 大于等于
greater
than or equal
≢
小于等于
less than or equal
≡ 恒等于
identical
with
≈
约等于
approximately equal
≌ 全等于
congruent
～
等价于
equivalent to;
相似于
similar to
→
趋近于
approaches
( )
括号
,
括弧
1)
parentheses;parenthesis;sign
parenthesis
圆括号
,
圆
括弧
2) round brackets
[ ]
方括号
1) squre [angular]
brackets
括号
2) brackets
{ }
花括号
braces
∑ 求和
summstion
of;sigma
n;sigma
从
1
到
n
的和
the
sum form i equalsone to
n
从
1<
/p>
到
n
的积
the product form i
equalsone to
x1
+x2+x3+
Λ
Λ
x one x
two plus x three,etc(et cetera)
a=b 1) a equals to b
2) a is equal
to b
3) a is b
a≠b a is not
equal to b;a is not b
a>b a is greater than b
a
a≣b a is greater than or
equal to b
a≢b
a is less than or equal
to b
a≈b a
approximately equal (s) b
a∝b a varies directly as
b;a is (directly) proportional to
b
a∈A a is member
of set A
A
⊂
B
A is contained in B;A is a
proper subset of B
AIB A intersection B
AYB A union
{
}
或
φ
empty set
⇒
implies
⇔
is equivalent to
xRy x is in
the relation R to y
a±b a plus or minus b
(a+b)(a-b) a
plus b,a minus b
(a+b)2 a plus b all squared
(a÷b)2 a over b all
squared
n! n factorial;factorial n
a% a persent
|a| mod a;modulus a
x→∞ x
approaches infinity
0< x
0≢x≢a zero is less than or
equal to x is
less than or
equal to a
c=a.b 1)c equals (is equal
to) a
multiplied by b
2)
c equals a times b
1:2 the ratio of one to two
1/2 a half;one half
1/3 a third;one
third
1/100
a[one] hundredth
1/1000 a[one] thousandth
0.1(.1) zero point
one;nought point one
0.01(.01) zero point zero one;nought
point nought one
3.1416 three point one four one six
14.
one four point one four,one four recurring
a:b the ratio
of a to b
a:b=c
1) a devided by b equals c
2) a devided by b is c
3)the ratio of a to b is c
a:b=c:d 1) the ratio of a
to b equals the ratio of c to d
2)
a is to b as c is to d
a+b>c a plus b is greater then c
a+b< then b
plus>
a+b=c a
plus b is (are;equals;is equal to) c
a-b=c a minus b(b from a)
is(equals;is equal to;leaves) c
(a,b) a
[a,b]a≢x≢b the closed
interval from a to b
(a,b) the interval a
[a
,b] the interval a≢x
a
a≢x≢b
a
is
less
then
or
equal
to
x
is
less
then
or
equal
to
b
logax logarithm (base) of x
lnx natural logarithm of x
x
2
1)x square;x
squured
2) x to
the second power
3) x raised to the second power
4) the square
of x
5) the
second power of x
6) x to the second
x
3
1)x cube;x cubed
2) x to the third power
3) x raised to the third
power
4) the
cube of x
5)
the third power of x
6) x to the third
x
n
1)x to the n-th power
2) x raised to the n-th power
3) the n-th
power of x
4) x
to the n-th
x
-n
1) x to the
minus n-th
2) x
to the minus n-th power
radical
=b 1) the square root of a is(equals) b
2) the square
root out of a is(equals) b
the square root of a
the cube root of a
the cube root
the n-th root
a′ a
prime
a
n
1) a second
prime
2) a
double prime
3)
a twice dashed;
a
m
1) a triple
prime
2) a
third prime
a
1
1) a sub one
2) a first
a
2
1) a sub two
2) a second
a
m
1) a sub m
2) a m-th
a'
m
1) a
prime,sub m
2)
a sub m,prime
a'
1
a first prime
a
n
2
a
second, second prime
y first derivative of y
second derivative of y
dy/dx first
derivative of y with respect to x
d2y/dx2 second derivative
of y with respect to x
y=f(x) y is a function of x
∫ integral of
1)
integral of……from a to b
2) integral of……between
limits a and b
plus minus x
square
capital L equals the
square root of (out of ) capital R
square
root of
(out of) a to
the m-th power
a
to
the
m
by
n-th
power
equals
the
n-th
P=∞ p is equal
to infinity
∟ angle
⊥ perpendicular;is
perpendicular to
∠ parallel;is parallel
to
△ABC triangje ABC
vector F
a bar
≌ is congruent
to
～
is similar t
A-1 inverse of matrix A
% percent
二、英语缩写词
abs
A.D
ad inf
ads
agg
al
alt
a.m
a.m.
amt
ans
AoI
A.P
appl
appr
appx
arg
arith
aut
absolute
absolutely
Anno Domini
ad infinitum
address
aggregate
algebra
altitude
alternate
绝对的
绝对地
公元
趋于无限
地址
总数、共计
代数
高度
交错
,
交替
above-mentioned
上述的
arithmetic
mean
算术平均
amount
answer
arithmetic
progression
application
approximate
appendix
argument
arithmetic
automatic
数量
答案、解答、回答
等差数列
应用
近似、约计
附录
自变数
,
幅角
算术
自动的
辅助的
and-or-
inverter
与或非
aux,auxil
auxiliary -
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