Brian, it is possible for a set to be an element of another set. set <'' with no space between the quotes is the set whose only element is '' , the empty set. (Again no space between the quotes). This is analogous to set <2 being the set whose only element is the number 2 . --Kip
Sent from my iPad > On Nov 19, 2013, at 12:47 PM, Brian Schott <[email protected]> wrote: > > Kip, > > Yes, I agree with what you get. I am a little unsure of the meaning of `set > <''` but I am guessing it means a set of a blank or non character, which is > different from Empty, the empty set. > > And so I suppose it might be worthwhile to make the point that all sets in > your system, except the empty set, are boxed. And I think you do make that > point, but it was a little hard for me to learn. > > I think I prefer the newer system, so far. > > -- > (B=) > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
