"Mutual" means the same voters constitute the majority for A over B, as for A over C (and for every other pair; they all have a common majority-size set of voters behind them).
I am not saying mutual majorities should be especially valued in comparison with ordinary majorities. In fact, if anything I think the opposite is more true. However, some people claim to care about them, and so I just wanted to mention a few theorems I thought up while under the influence of drugs and/or James Green-Armytage. -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step) and math.temple.edu/~wds/homepage/works.html ---- Election-Methods mailing list - see http://electorama.com/em for list info
