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Groups > comp.soft-sys.math.mathematica > #2043
| From | David Bailey <dave@removedbailey.co.uk> |
|---|---|
| Newsgroups | comp.soft-sys.math.mathematica |
| Subject | Re: Why Indeterminate? |
| Date | 2011-05-03 09:44 +0000 |
| Organization | Steven M. Christensen and Associates, Inc and MathTensor, Inc. |
| Message-ID | <ipoiq4$g2r$1@smc.vnet.net> (permalink) |
| References | <ipm2em$58b$1@smc.vnet.net> |
On 02/05/2011 11:53, Themis Matsoukas wrote: > The puzzling thing is that, having defined A and a, we now get > > A[a, x] > > (1/(1 - 3 (1 - 2 x)) + (2 (1 - 2 x))/(1 - 3 (1 - 2 x))) (1 - x) x > > which has no indeterminacy. What Mathematica is not telling us is that it obtained this result assuming x<>0.5. > > tm > Imagine that Mathematica was as rigorous as you suggest. It could barely simplify any expression. For example, (z^2+z)/z could not be simplified without wrapping the result in a condition! Computer algebra (or indeed hand calculations) would be virtually useless done that way. David Bailey http://www.dbaileyconsultancy.co.uk
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Re: Why Indeterminate? Themis Matsoukas <tmatsoukas@me.com> - 2011-05-02 10:53 +0000 Re: Why Indeterminate? David Bailey <dave@removedbailey.co.uk> - 2011-05-03 09:44 +0000
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