Re: Can't get Mathematica to evaluate correctly a

*To*: mathgroup at smc.vnet.net*Subject*: [mg111545] Re: Can't get Mathematica to evaluate correctly a*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Wed, 4 Aug 2010 07:39:58 -0400 (EDT)*Reply-to*: hanlonr at cox.net

The input expression must have higher precision N[173746*Sin[10^22] + 94228*Log[171/10] - 78487*Exp[42/100], 10] -1.341818958*10^-12 N[Release[Rationalize[Hold[ 173746*Sin[10^22] + 94228*Log[17.1] - 78487*Exp[0.42]]]], 10] -1.341818958*10^-12 Bob Hanlon ---- Damien Wyart <damien.wyart at free.fr> wrote: ============= Hello, I am using Mathematica 7.0.2 and playing a bit with an expression analyzed in the following paper: http://www.loria.fr/~zimmerma/papers/cise.pdf I tried many constructions with N and SetPrecision and can't get Mathematica to output the correct result (I am not very experienced with Mathematica). Here is the expression : 173746*Sin[10^22]+94228*Log[17.1]-78487*Exp[0.42] The correct result should be -1.341818958*10^-12 but even forcing each term with N and a very large number, I am still not getting this value at all. Any help will be appreciated. Thanks in advance ; best regards, -- Damien Wyart