Re: ZTarnsform[Sin[4 n],n,z] OK, but ZTransform[Sin[5 n],n,z,] hangs?

*To*: mathgroup at smc.vnet.net*Subject*: [mg56812] Re: [mg56772] ZTarnsform[Sin[4 n],n,z] OK, but ZTransform[Sin[5 n],n,z,] hangs?*From*: Chris Chiasson <chris.chiasson at gmail.com>*Date*: Fri, 6 May 2005 03:01:16 -0400 (EDT)*References*: <200505051003.GAA22072@smc.vnet.net>*Reply-to*: Chris Chiasson <chris.chiasson at gmail.com>*Sender*: owner-wri-mathgroup at wolfram.com

Same behavior on 5.0 Windows XP SP2 I suppose it would get an answer eventually On 5/5/05, steve <nma124 at hotmail.com> wrote: > Hello; > This is Mathematica 5.1 on windows. > > This is a strange one. > > When I start Mathematica and type > > ZTarnsform[Sin[4 n],n,z] > > Then I get the answer. > > but if replace '4' by '5' above, I see Mathematica starts > to consume huge amount of memory untill the PC hangs running > out of virtual RAM. > > ZTarnsform[Sin[5 n],n,z] <---- hangs > ZTarnsform[Sin[4 n],n,z] <---- ok > > any one has any idea what is going on? is this some subtle > mathemtical thing I am overlooking that is causing this? > what is so special about '5' here? > > thanks, > Steve > > -- Chris Chiasson http://chrischiasson.com/ 1 (810) 265-3161

**References**:**ZTarnsform[Sin[4 n],n,z] OK, but ZTransform[Sin[5 n],n,z,] hangs?***From:*"steve" <nma124@hotmail.com>