The second derivative of the sum of squares evaluated at 1 1 is +/@:*: D.2 [ 1 1
yielding 1.95239 _0.0444089 _0.0444089 1.95239 However from my understanding this should yield a diagonal matrix with 2 on the diagonal. What am I misunderstanding. Why does D.2 not work as expected? ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
