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serious inverse matrix bug?
12-05-2019, 01:38 PM (This post was last modified: 12-05-2019 01:48 PM by Albert Chan.)
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Albert Chan Offline
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RE: serious inverse matrix bug?
Tried doing inverse by "hand", XCas 1.4.9-57 (win32).
The bug maybe in rref()

Code:
XCas> m := [[1,0,1,0], [0,1/(2*s),0,1]]
XCas> rref(m)          → [[1,0,  1,0]    , [0,1,  0,2*s]]
XCas> rref(float(m))   → [[1,0,  2.0*s,0], [0,1,  0,4.0*s^2]] ???

BTW, doing inv([[1,0], [0,1/(2.*s)]]) crash XCas.
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Messages In This Thread
serious inverse matrix bug? - deachp - 12-05-2019, 04:49 AM
RE: serious inverse matrix bug? - Albert Chan - 12-05-2019 01:38 PM
RE: serious inverse matrix bug? - parisse - 12-05-2019, 07:10 PM



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