The efficacy and complication rate of menstrual regulation with the hand-held Karman cannula was tested on 223 women with amenorrhea up to 56 days in the Dept. of Obstetrics and Gynecology, University of Nairobi, Kenya from October 1982-January 1983. 195 women had positive pregnancy tests, while menstrual regulation was done on the others because of concern over late menses. the procedures we...

A survey of the literature on independent sets in triangle-free graphs with fixed maximum degree will be presented. Included will be lower bounds on the independence ratio for graphs with maximum degree, algorithms for finding such independent sets with guaranteed bounds, and several open problems.

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