Bidual

%5B%5BWikipedia%3ARedirects+for+discussion%5D%5D+debate+closed+as+delete

#REDIRECT Strong dual space#Bidual

In mathematics, the bidual is the dual of the dual of an object, for various definitions of duality. The term is particularly used in linear algebra, especially functional analysis for the bidual of a topological vector space, where it is written as ${\displaystyle V^{**}}$ or ⁠${\displaystyle V''}$⁠, and includes:

• Strong dual space § Bidual
• Banach space § Bidual
• Order bidual

• Double dual – synonymous, though usage varies by context