Generalized Inverses and Applications. Proceedings of an Advanced Seminar Sponsored by the Mathematics Research Center, the University of Wisconsin–Madison, October 8–10, 1973

Laugh and cry. Having a good sob is reputed to be good for you. So is laughter, which has been shown to help heal bodies, as well as broken hearts. Studies in Japan indicate that laughter boosts the immune system and helps the body shake off allergic reactions.