Definition talk:Functional/Real

This seems very similar to a distribution. Is there a difference? --GFauxPas (talk) 13:34, 5 January 2017 (EST)
 * I believe distributions is a subset of functionals in a sense that they are linear and act on "test functions", but I am not yet educated in that area. --Julius (talk)

"Well-defined"
Well-defined-ness was only mentioned in the book by Hans Sagan, but not explained. I guess this was just a superfluous description, and could be deleted. However, if it is desirable to have something equivalent to well-defined mapping, then I at this moment I cannot help. --Julius (talk)

Domain of J
You are correct. My mistake.


 * Well-defined is redundant -- all mappings are "well-defined" in this context, or they are not mappings.


 * Removed the comment about "points", as it does not bring anything to the definition, and merged the rest of the "technical note" -- we prefer to keep that heading title for notes about how to craft the $\LaTeX$ and so on. --prime mover (talk) 14:29, 5 January 2017 (EST)