I would use array for this problem inside of an align* environment--assuming you don't need each line numbered (which of course is not that hard to do in addition but requires some more explanation). On Apr 17, 2011, at 1:59 PM, "macosx-tex-request at email.esm.psu.edu" <macosx-tex-request at email.esm.psu.edu> wrote: > Using align with "or"