If there is a maximum lower bound for a set of real numbers A , then it is called the lower bound of A. Literally, it is the lower limit of A. It is also called the greatest lower bound. This comes from the fact that if there is a lower bound, then there are an infinite number of lower bounds, but among them there exists a maximum number, and this is called the lower bound. The definition of a lower bound can also be stated as follows. Given a set of real numbers a and a real number a , if x belongs to A , and if x ∈ A , then a ≦ x , and for any small positive number ε, if there exists an x such that a ≦ x < a - ε, x ∈ A , then a is called the lower bound of A. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
実数の集合 A の下界のうちで最大のものがあるとき,それを A の下限という。文字どおり,A の下の限界のことである。最大下界ということもある。これは,下に有界であれば下界は無数にあるが,そのなかには最大数が存在し,これを下限というところからきている。下限の定義は次のようにいうこともできる。実数の集合 a と実数 a があって,x は A に属する x∈A ならば a≦x であり,どんな小さな任意の正の数 ε をとっても,a≦x<a-ε ,x∈A を満足する x が存在するとき,a を A の下限という。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
<<: Family sayings - Family sayings
…In India, the highly aromatic Darjeeling tea, wh...
...The unripe fruit of the opium poppy, Papaver s...
French composer and music theorist. He was roughly...
An island in the southeastern Red Sea that is part...
Founded in January 1932 by Yasuoka Masaatsu of Kin...
…[Masami Hayashi]. . … *Some of the terminology t...
A vast plateau in the center of the Iberian Penin...
A school of fish that seabirds follow. It is also ...
This is a type of phimosis where the foreskin is ...
These caves are located in Chokushi-machi, Kaga Ci...
In traditional logic, this term is used to refer ...
Soviet poet. His real name was Dzyubin. He was bo...
A plucked string instrument that was extremely po...
...In addition, the 15th and 16th centuries produ...
...Kolyadka is a song that accompanies a rite of ...