ikautak.log

C/C++, Python, CUDA, Android, Linux kernel, Network, etc.

数学 英語の読み方

整数(Integer)

  • 123
    one hundred (and) twenty three

  • 3,456
    three thousand four hundred (and) fifty six

  • 12,345
    twelve thousand three hundred (and) forty five

少数(Decimal)

  • 7.01
    seven point 0 one

  • 0.19
    0 point one nine

  • 3.1412
    three point one four one two

分数(Fraction)

  • a/b
    a over b

  • 1/2
    a half または one half

  • 1/3
    a third または one third

  • 1/4
    a quarter

  • 1/10
    one tenth

  • 1/12
    one twelfth

  • 2/3
    two thirds

  • 3/4
    three quarters

  • 5/12
    five twelfths または five over twelve

指数(Index)

  • a2
    a squared

  • 52
    five squared

  • b3
    b cubed

  • xN
    x to the Nth power または x to the power N または簡単に x to the N

  • x^{-N}
    x to the minus Nth power または x to the power minus N または簡単に x to the minus N

N乗根(Nth root)

  • \sqrt{x}
    the square root of x または簡単に root x

  • \sqrt[3]{x}
    the cube root of x または簡単に cube root x

  • \sqrt[N]{x}
    the Nth root of x

  • \sqrt[N]{x^{m}}
    the Nth root of x to the power m

対数(Logarithm)

  • \log_{10} x
    log of x to the base ten

  • \log_{a}  x
    log of x to the base a

  • \log x
    log of x

  • \log_{e} x
    log of x to the base e

  • \ln x
    natural log of x

下付文字(Subscript)

  •  X_1
    X subscript one または簡単に X sub one

  •  X_n
    X sub n

  •  A_{xy}
    A sub xy

上付文字(Superscript)

  •  x^'
    x prime

  •  x^{''}
    x double prime

記号


  • therefore


  • because または since


  • infinity

  • ( )
    parentheses

  • (a)
    a in parentheses

  • (
    parenthesis open または initial parenthesis

  • )
    parenthesis close または final parenthesis

  • { }
    braces

  • {
    brace open または initial brace

  • }
    brace close または final brace

  • [ ]
    brackets

  • [
    bracket open または initial bracket

  • ]
    bracket close または final bracket

数式, 不等式

  •  a = b
    a equals b または a is equal to b

  •  a \ne b
    a is not equal to b

  •  a \equiv b
    a is identical with b

  •  a \approx b
    a is nearly equal to b

  •  a \sim b
    a is asymptotic to b

  •  a + b = c
    a plus b equals c

  •  a - b = c
    a minus b equals c

  •  a \pm b = c
    a plus or minus b equals c

  •  a x^{2} + bx - c = 0
    a x squared plus b x minus c equals zero

  •  a \div b = c
    a divided by b equals c

  •  a \times b = c
    a times b equals c または a multiplied b equals c

  •  \frac{a}{b(c+d)}
    a over b times c plus d in parenthesis

  •  a \gt b
    a is greater(またはmore) than b

  •  a \gg b
    a is much greater(またはmore) than b

  •  a \lt b
    a is smaller(またはless) than b

  •  a \ll b
    a is much smaller(またはless) than b

  •  a \ge b
    a is greater than or equal to b

  •  a \le b
    a is smaller than or equal to b

  • f(x)
    function of x

  • dx
    differential of x

  • \frac{dx}{dt}
    derivative of x with respect to t

  • \frac{d^{2} x}{dt^{2}}
    the second derivative of x with respect to x

  • \frac{\partial y}{\partial x}
    partial derivative of y with respect to x

  •  \int
    integral sign

  •  \int_a^{b} f(x) dx
    integral between the limits x equals a and b of the function of x dx

  •  \sum
    capital sigma(summation sign)

  •  \sum_{i=1}^{n} x_i
    the sum of all terms of x sub i from i equals one to i equals n