Question: Greek letter xi

Sirs,

Today I encountered the following issue. I am working in a Maple worksheet with the variable "xi", which looks as ξ on the Maple output screen.

I am also working in LaTeX with the aid of Scientific Word, a LaTeX-interpretator.

I copied an expression from the screen (Scientific Word) containing the letter ξ (in LaTeX \xi, on the screen as the letter ξ) and put that expression in my Maple worksheet. In the output screen of Maple my variable "xi" and the copied expression from LaTeX (ξ) looked exactly the same. However, for Maple those variables were different, respectively "xi" and "\316" as I noticed in my *. mw file.

My calculations caused my a problem, I did not get what I expected. Firstly, I thought I made somewhere a mistake but after all the copy from the screen in Scientific Word turned out to be the culprit. So, it is not wise to make a screen copy. 

But, why are the two variables looking the same in Maple while they are not for the calculations? 

Ed Veling, The Netherlands