you forgot the minus sign on the lower bound.

oh my. handwriting recognition of math formulae on a windows 7 platform running on a ibook pro... Can't imagine any problems there...

totally agree. The best editing software for equations I've ever seen is latex, and I suspect it's still too slow for taking notes in class. There used to be these crazy pens that could capture notes (and doodles) to image files... But it'd probrably be easier just to scan them later, as it'd give you a chance to review them anyway.

If some men are getting more than 1 wife, that would mean that more men are getting no wives. This group is more than making up for the higher force of death amongst those that are married.