serious inverse matrix bug?

12052019, 04:49 AM
Post: #1




serious inverse matrix bug?
Hello, I found this bug calculating the inverse of a matrix in the latest firmware, Have you guys seen it in any previous firmware before?


12052019, 01:16 PM
Post: #2




RE: serious inverse matrix bug?
I forwarded on to the CAS author and it has been corrected. Only looked like it happened due to the approximate number in there.
1/2*s would have worked fine. TW Although I work for the HP calculator group, the views and opinions I post here are my own. 

12052019, 01:38 PM
(This post was last modified: 12052019 01:48 PM by Albert Chan.)
Post: #3




RE: serious inverse matrix bug?
Tried doing inverse by "hand", XCas 1.4.957 (win32).
The bug maybe in rref() Code: XCas> m := [[1,0,1,0], [0,1/(2*s),0,1]] BTW, doing inv([[1,0], [0,1/(2.*s)]]) crash XCas. 

12052019, 07:10 PM
Post: #4




RE: serious inverse matrix bug?  
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