Dave said... <snip> Alan, let me discuss this with you off-line. I've thought about it quite a bit, and would like to try some ideas on you.
Cheers! DaveT </snip> Uh-oh....our two math whizzes are gonna work this out off line, then confuse the hell out of us when they come back. I've seen this before....the answer is intuitively obvious to even the most casual observer. The proof is left to the reader. <GRIN> Royce
