I'm happy to take the credit for such insightful work! Unfortunately, it was Yair who wrote it. But hey, you've gotta take credit where you can get it... Cheers, Zik On 22/05/06, Russell McMahon wrote: > > Read Zik's fascinating and useful commentary. > Parts of this say: > > ... instantaniety is undefined for events that occur at different > places. >... -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist