...For example, the upper limit of E = {1-1/ n | n is a natural number} is 1, which does not belong to E. The infimum (greatest lower bound) is similarly defined by reversing the magnitude relationship: if a is the upper limit of E , then - a is the lower limit of {- x | x ∈ E } . In general, when the set f (M) of all values on M of a real-valued function f ( x ) defined on a set M is bounded above, the upper limit of the set f ( M ) is expressed as ... *Some of the terminology explanations that mention "infimum" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…例えば,E={1-1/n|nは自然数}の上限は1であり,これはEに属さない。下限infimum(greatest lower bound)も大小関係を逆にして同様に定義され,aがEの上限であれば,-aは{-x|x∈E}の下限である。一般に,集合M上で定義された実数値関数f(x)の,M上の値全体の集合f(M)が上に有界であるとき,集合f(M)の上限をまた,下限はと表す。… ※「infimum」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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