If [tex]f[/tex] is some function defined at points "s" and "t," is there any way to simplify the following expression?
None that I know of.
The Attempt at a Solution
I've been tinkering with this for a while and so far, I've determined the answer to be no. I know that
in general, and that implies that
But does anyone know another way to simplify this to maybe some kind of composition?