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what does the "capital F" notation stand for? is a brief description needed? Brad7777 ( talk) 14:45, 6 November 2011 (UTC) reply

Are you talking about ${\displaystyle \mathbb {F} }$ in

${\displaystyle f:\Omega \rightarrow \mathbb {F} }$ (where ${\displaystyle \mathbb {F} }$ is one of ${\displaystyle \mathbb {R} )}$?

As the article exlains, ${\displaystyle \mathbb {F} }$ is a stand-in for one of the fields ${\displaystyle \mathbb {R} }$ and ${\displaystyle \mathbb {C} }$, with "F" probably intended to be reminiscent of field. This usage is quite common. (Though the symbol ${\displaystyle \mathbb {K} }$ is probably even more commonly used in the same function, with "K" för Körper, the german term for field.) — Tobias Bergemann ( talk) 13:46, 8 November 2011 (UTC) reply

Well... I guess no one will complain if I change it from ${\displaystyle \mathbb {F} }$ to the more commonly used ${\displaystyle \mathbb {K} }$, right? Many people like to use ${\displaystyle \mathbb {F} }$ for finite fields (or at least fields of non-zero characteristic)... Lenacore ( talk) 12:32, 11 March 2015 (UTC) reply