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If you try to add a cell into an existing group via Ctrl-C Ctrl-V, the original group breaks up in a non-reparable way (in the Manual grouping regime). The cells are neither grouped anymore nor ungrouped. An attempt to just group everything together...
Hello, I was investigating the behaviour of Mathematica with matrices, and found the following very strange fact. For the following matrix `V = 5 {{0.0030, 0.0008}, {0.0008, 0.0037}}` with some very nice `Eigenvalues[V] {0.0211161, 0.0123839}` ...