Well since the denizens of the relativity forum don't like me, I thought I might ask here see if I get better replies. 1) Why is it that in general geodesics are paths of "stationary character" rather than minimum? 2) http://img366.imageshack.us/img366/3280/math30016nx.jpg I can't quite follow equation 11.16. Specifically how they differentiate dxm/ds in the denominator. Shouldn't be necessary, but for reference, the following page is here.