以 f 开头的数学词汇 | 玄数

2012-10-07
face   面
A side or surface of a geometrical body.

factor   因数
A number that divides into another number exactly.

factorial   阶乘
The product of a given positive integer multiplied by all lesser positive integers. Symbol: n!

n! = n(n – 1)(n – 2) … × 2 × 1


For example: 5!= 5 · 4 · 3 · 2 · 1 = 120

factoring   因式分解
The act or process of separating an equation, formula, cryptogram, etc., into its component parts.

 

Fahrenheit   华氏温度
Of or relating to a temperature scale that registers the freezing point of water as 32° and the boiling point as 212° at one atmosphere of pressure.

Fibonacci Sequence   斐波那契数列
The unending sequence 1, 1, 2, 3, 5, 8, 13, 21, 34, … where each term is defined as the sum of its two predecessors.

finite   有限; 有穷的

  • (Of a set of elements) capable of being completely counted.
  • Not infinite or infinitesimal.
  • Not zero.

finite number   有限数
(Of a set of mathematical elements) capable of being completely counted.

flat   平

  • Having a smooth surface, not curved or sloping.
  • Being in horizontal position; lying down.

fluid ounce   液盎司

  • A unit of volume or capacity in the US Customary System, used in liquid measure, equal to 29.57 milliliters (1.804 cubic inches).
  • A unit of volume or capacity in the British Imperial System, used in liquid and dry measure, equal to 28.41 milliliters (1.734 cubic inches).

formula   公式
A statement, especially an equation, of a fact, rule, principle, or other logical relation.

fortnight   两星期
A period of two weeks.

Four Color Theorem   四色定理
Any geographic map can be colored using only four colors so that no connected countries with a common boundary are colored the same color, has been solved in 1976.
四色地图

fraction   分数
An expression that indicates the quotient of two quantities, such as 2/3 .

fraction bar   分数线
In 2/3, the fraction bar is “/”.

frequency   频率

  • The number of times a value recurs in a unit change of the independent variable of a given function.
  • A wavelength on which a radio or television signal is broadcast and to which a receiving set can be tuned.

frequency distribution   频数分布
The correspondence of a set of frequencies with the set of categories, intervals, or values into which a population is classified.

frequency polygon   频数多边形
A graph obtained from a frequency distribution by joining with straight lines points whose abscissae are the midpoints of successive class intervals and whose ordinates are the corresponding class frequencies.
frequency polygon

function   函数
A relation f that assigns to each member x of some set X a corresponding member y of some set Y; y is said to be a function of x, usually denoted f(x) (read “f of x “). In the equation y=f(x), x is called the independent variable and y the dependent variable. In practice, X and Y will most often be sets of numbers, vectors, points of some geometric object, or the like. For example, X might be a solid body and f(x) the temperature at the point x in X; in this case, Y will be a set of numbers.