Welcome Diane! I see you have already learned not to underestimate the geek power of the Icehouse list. Check "pyramid measurements" in the archives if you want another dose ;-) even the recent color discussions got geeky. I even got [correctly] called out when I said "Numismology" when I meant "Numismatics". (Topher, IIRC -- thanks again) Not that I'm complaining! I appreciate the attention to detail that is so rarely found on blogs/forums/maillists these days, and another mathophile is always welcome, in my opinion... and there's generally plenty of humor to keep it from being dry. Cheers, Ankhst Joe Pate CAD INFR Marvell Semiconductor Inc. direct: (408) 222-0736 mobile: (831) 359-0656 jpate@xxxxxxxxxxx ----------------------- Every jumbled pile of person has a thinking part That wonders what the part that isn't thinking, isn't thinking of -TMBG "Where your eyes don't go"