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Groups > comp.soft-sys.math.maple > #254
| From | Peter Pein <petsie@dordos.net> |
|---|---|
| Newsgroups | comp.soft-sys.math.maple |
| Subject | Re: LinearSolve, BackwardSubstitute(GaussianElimination) - different answers? |
| Date | 2011-09-26 11:48 +0200 |
| Organization | 1&1 Internet AG |
| Message-ID | <j5phq7$62j$1@online.de> (permalink) |
| References | <ea40abbb-3b88-4778-9381-983cb4019475@i28g2000yqn.googlegroups.com> |
Am 26.09.2011 02:46, schrieb lasalle25: > with(LinearAlgebra): > a:=<27.6,30.2,162;3100,6400,23610;250,360,1623>; > LinearSolve(a); > BackwardSubstitute(GaussianElimination(a)); Hmm... I get "Error, (in LinearAlgebra:-LA_Main:-BackwardSubstitute) inconsistent system" but using rationals (276/10 and 302/10), the results are the same. seems to depend on floating point noise Peter
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LinearSolve, BackwardSubstitute(GaussianElimination) - different answers? lasalle25 <betty.n.love@gmail.com> - 2011-09-25 17:46 -0700
Re: LinearSolve, BackwardSubstitute(GaussianElimination) - different answers? acer <maple@rogers.com> - 2011-09-25 20:35 -0700
Re: LinearSolve, BackwardSubstitute(GaussianElimination) - different answers? Peter Pein <petsie@dordos.net> - 2011-09-26 11:48 +0200
Re: LinearSolve, BackwardSubstitute(GaussianElimination) - different answers? Ray Vickson <RGVickson@shaw.ca> - 2011-11-04 15:03 -0700
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