On Sat, Nov 16, 2013 at 3:00 PM, km <[email protected]> wrote: > A fair reason for the outer enclosing box is that in math a list and a set > are different.
But in math a 5 and a 5 can be different, for example if one of them is feet and the other is seconds, or in any of a variety of other circumstances. (For example, one might be a constant and another might be a non-unique valid example of an otherwise free variable.) On the other hand, we can use five apples to represent five seconds, for example in a classroom discussion where we need a placeholder as a part of the discussion. Or, perhaps a different kind of seconds if we are talking about a second helping of dessert? These distinctions though, appear in our uses of language rather than in the language itself. I hope this helps. -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
