Donna: I finally get your point: see below. Sorry it has taken so long.
> dly wrote: > Anyway, some methods to approach such problems involve building a > simplex plateau as for general problems but with only integer > elements and this property must be maintained at each iteration. > INTEGER not RATIONAL, but if you are forced at some step to say > divide 111 by 333 you might want to keep the result as 111r333 and go > on until a later step where you can get back into an Integer. You > are best to consult the literature as this is getting quite long and > I don't seem to be making it clear. > This corresponds to converting a matrix to Smith normal form over the integers, versus diagonalizing it over the rationals. I agree that one might think of this as the difference between 111r333 and 1r3, but it does not really have to do with computer representation of rationals: it is more that the integers form a principal ideal domain while the rationals do not. However, I do get what you are driving at. Best wishes, John ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
