What's difference between 'functional' and 'function'? - MathOverflow [closed] most recent 30 from http://mathoverflow.net 2013-05-24T04:42:16Z http://mathoverflow.net/feeds/question/65826 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/65826/whats-difference-between-functional-and-function What's difference between 'functional' and 'function'? KKH 2011-05-24T08:38:14Z 2011-05-24T08:43:22Z <p>Hi, I want to know difference that between 'functional' and 'function'.</p> <p>Of course, in Wikipedia, <a href="http://en.wikipedia.org/wiki/Functional_(mathematics" rel="nofollow">http://en.wikipedia.org/wiki/Functional_(mathematics</a>), there is many texts.</p> <p>But what's the simple answer for this question? ;-)</p> http://mathoverflow.net/questions/65826/whats-difference-between-functional-and-function/65827#65827 Answer by Glen Wheeler for What's difference between 'functional' and 'function'? Glen Wheeler 2011-05-24T08:43:22Z 2011-05-24T08:43:22Z <p>No difference really, just convention.</p> <p>A functional normally acts on other functions, whereas a function normally acts on some underlying vector space or field. But this is not always true.</p>