HP Prime [ Matrix Function ] BUG ln( [[0,1][1,1]] ) in Exact and Approximate CAS Mode
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10-30-2014, 05:55 AM
Post: #1
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HP Prime [ Matrix Function ] BUG ln( [[0,1][1,1]] ) in Exact and Approximate CAS Mode
I would like to Report a BUG in HP Prime CAS [ Matrix Functions ], specifically in calculating
ln( [[0,1][1,1]] ) which resulted in a matrix response with WRONG Matrix[1,2] and Matrix[2,1] elements. I'am using the Newest version ROM 6030 in calculator and 6031 in emulator, and the problem in CAS mode results both in Exact and Approximate Mode, for which the [[−0.215204470482+2.2732777998989*i , 0.430408940964] [0.430408940964+1.40496294621*i , 0.21520447048202+0.868314853691*i]] approximate numerical result returned simply does not match with the Correct numerical answer which should be [[−0.215204470482+2.2732777998989*i , 0.430408940964-1.4049629462081*i] [0.430408940964-1.40496294621*i , 0.21520447048202+0.868314853691*i]] which in this case returns back approximately [[0.,1.][1.,1.]] by taking e^Correct Result, and produces a Wrong result by taking e^Wrong Answer ( produced by ln( [[0,1][1,1]] ) in HP Prime ), which returned a totally distinct matrix ( with all complex numbers ) instead of the [[0.,1.][1.,1.]] expected result. Yours Sincerely, hoping this Post would be Directed to the Right HP Prime Staff Personnel so as to provide a future BUG Correction in a next ROM release, wishing a Nice day and work to all. |
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