Enumerated list

[Alexander Stasinski]

Can anybody tell me how to get a list of the following type:

(i)   Case one.
(ii)  Case two.
(iii) Case three.
...
That is, each item enumerated by small roman figures inside a pair of
braces. I want to use this, e.g. in a theorem environment.

Thanks to all of you who share your knowledge of LyX.

/Alex