Re: Trouble with FullSimplify
- To: mathgroup at smc.vnet.net
- Subject: [mg98694] Re: Trouble with FullSimplify
- From: Szabolcs <szhorvat at gmail.com>
- Date: Thu, 16 Apr 2009 04:16:30 -0400 (EDT)
- References: <gphdse$omb$1@smc.vnet.net> <gs47h2$7ka$1@smc.vnet.net>
On Apr 15, 11:57 am, lehi... at gmail.com wrote: > On 15 =DC=D0=E0, 03:16, JUN <noec... at gmail.com> wrote: > > > What is wrong with the following in Mathematica 7: > > > Clear[n]; > > FullSimplify[n Exp[-n * 0.], Element[n, Integers]] > > > result: n/2, which is scary. If I replace 0. by $MachineEpsilon/2, I > > get a correct result. > > > It's also fun to express your feelings about Mathematica 7 this way: > > FullSimplify[$Version Exp[$Version *($VersionNumber - > > $VersionNumber)]] > > > Jens > > This is a terrible bug. I am very much disappointed with Simplify and > even more with FullSimplify functions in Mathematica 6 and worse in > Mathematica 7. OK, so what exactly is it that's broken in Simplify in version 7 (and not in version 6), *apart* from this specific bug? What is it that's broken in 6 too? It sounds like you've found other problems, so please post your examples in this thread.