User blog comment:Boboris02/MBOT/@comment-1605058-20161230135452/@comment-30118230-20161230153756

I understand your first paragraph.

"So your   Δ  κ       is what nearly everyone else in the world would write as   Δ ( κ )     ?"-what's the point you're trying to make?

And no,the letter F is not a function,because you cannot give it an input (\(\kappa\)) and get an output out of it (\(\rho\)),aka \(\rho\) does not exist for F. -exactly my definition

"No need to specify that this is equal to something - it is equal to itself."-No,a function that's not equal to anything is not a function.