数学专业英语-希腊字母

3.符号与表达式
a＋b a plus b; (positive) a－b a minus b; (negative) a±b a plus or minus b a×b a multiplied by b; (times) a÷b a divided by b; a:b the ratio of a to b
definite integral of the function f from a to b
x approaches the limit a
b
b prime
b b double prime
b b triple prime
bm b sub m x x dot
x x two dots
because; since
a is of identity to b
a b a is approximately equal to b
a b a is congruent to b
a p a to the power p
a
square root of a
Hale Waihona Puke Baidu
3 a cube root of a
n a n th root of a
respect to x value at a of the derivative of the
function f
dn f dxn f x
f (x)dx
b
a f (x)dx
xa
n th derivative of the function f with respect to x partial derivative of the function f with respect to x, where f is a function of x and another variable (or variables) an indefinite integral of the function f
f (x)
function f of x
y f (x) y is a function of x
x
increment of x; delta x
df
df
dx
(
df dx
)
xa
total differential of the function f derivative of the function f with
6×5=30
练习
Six times five equals thirty; Six multiplied by five is equal to thirty; Six multiplied by five makes/ make
a=b a is equal to b; a equals to b a≠b a is not equal to b; a is not b a＞b a is greater than b a＜b a is less than b a≥b a is greater than or equal to b a≤b a is less than or equal to b a≡b a is identically equal to b;
four point nine recurring three point zero three two six, two six recurring
20o twenty degrees 6’ six minutes; six feet 10” ten seconds; ten inches 2% two percent 5‰ five per mille
therefore
for all; for every
there is a; there exists
round brackets; parentheses
square brackets
braces
pq pq x X A X X Y X Y X \Y
p implies q p is equivalent to q; p if and only if q x is (not) a member of the set X set A is (not) contained in set X union of sets X and Y intersection of sets X and Y differences of sets X and Y
数学专业英语
MATHEMATICAL ENGLISH
参考书目： 《数学专业英语》 吴炯圻 编著，高等教育出版社
数学符号的读法
• 1、希腊字母的读法与写法
•
alpha
beta
gamma
delta
epsilon
zeta
eta theta iota k appa lambda mu
nu xi omicron pi rho sigma
tau upsilon phi chi psi omega
2、数字
1/2 a half 或 one half 1/4 a quarter(fourth)或one quarter(fourth) 1/1234 one over a thousand two hundred and
thirty-four 4/5 four fifths或four over five 113/300 one hundred and thirteen over three
hundred
27 8
0.1 2.35
4.9
3.0326
two and seven over eight 或 two and seven eighths o point one 或 zero point one two point three five
| a | the absolute value of a
n!
factorial n
ex loga x
[x]
Re z
Imz
|z| arg z
z
exponential function (to the base e)of x logarithm to the base a of x the integral part of x real part of z imaginary part of z modulus of z argument of z conjugate of z