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LF-space : ウィキペディア英語版
LF-space
In mathematics, an ''LF''-space is a topological vector space ''V'' that is a locally convex inductive limit of a countable inductive system (V_n, i_) of Fréchet spaces. This means that ''V'' is a direct limit of the system (V_n, i_) in the category of locally convex topological vector spaces and each V_n is a Fréchet space.
Some authors restrict the term ''LF''-space to mean that ''V'' is a strict locally convex inductive limit, which means that the topology induced on V_n by V_ is identical to the original topology on V_n.
The topology on ''V'' can be described by specifying that an absolutely convex subset ''U'' is a neighborhood of 0 if and only if U \cap V_n is an absolutely convex neighborhood of 0 in V_n for every n.
==Properties==
An ''LF''-space is barrelled and bornological (and thus ultrabornological).

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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