Sun, 18 Oct 2009 16:25:04 +0200 nipkow added sums of squares for standard deviation
Sun, 18 Oct 2009 12:07:56 +0200 nipkow merged
Sun, 18 Oct 2009 12:07:25 +0200 nipkow Inv -> inv_onto, inv abbr. inv_onto UNIV.
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