Thread: Can someone explain this integral?

Hi,
I have the following step in a derivation



where and and

Whats going on here? Is the integral over w w.r.t. x w by definition? How can you have an integral over no function?

I guess this is pretty school-ish, but I haven't seen it before and would appreciate any clarity that can be provided.

Thanks, MD

The integral is just .

Hi and thanks for your reply. I see what you are saying I think, but if that is so, what is the difference between




and





?

Are these equivalent?

Thanks again for your time. MD

Yes, they are equivalent.