Re: Why Indeterminate?
- To: mathgroup at smc.vnet.net
- Subject: [mg118560] Re: Why Indeterminate?
- From: David Bailey <dave at removedbailey.co.uk>
- Date: Tue, 3 May 2011 05:44:32 -0400 (EDT)
- 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