Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2011

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Repeatable ways to crash the MathKernel

  • To: mathgroup at smc.vnet.net
  • Subject: [mg116091] Re: Repeatable ways to crash the MathKernel
  • From: David Reiss <dbreiss at gmail.com>
  • Date: Tue, 1 Feb 2011 06:55:37 -0500 (EST)
  • References: <ii5rka$fjh$1@smc.vnet.net>

And have you reported this to support at wolfarm.com?  Please do.

On Jan 31, 3:24 am, Alexander <alexander_elk... at hotmail.com> wrote:
> The first two sequences are repeatable with
>  $System=="Microsoft Windows (32-bit)" (sometimes the crash happens
>  when Plot3D is evaluated as In[1] after the intial startup before any
>  crash has happened):
>
> 1) The following sequence works on versions 5.2.0.0(has no
> exclusions),
>  6.0.3.0 & 7.0.1.0 but crashes version 8.0.0.0 of the kernel:
>
> In[1]:= Plot3D[Im[Log[((x+I*y)^2-Pi^2)^2]],{x,-2Pi,2Pi},{y,-2Pi,2Pi}]
> Out[1]=...(output not shown here)
>
> In[2]:= ?Plot3D
> ...(output not shown here)
>
> In[3]:= Plot3D[Im[Log[((x+I*y)^2-Pi^2)^2]],{x,-2Pi,2Pi},{y,-2Pi,2Pi}]
>
> After a few seconds the kernel crashes...
>
> 2) The following sequence works on versions 5.2.0.0(has no
> exclusions),
>  6.0.3.0 & 7.0.1.0 but crashes version 8.0.0.0 of the kernel:
>
> In[1]:= Plot3D[Piecewise[{{Im[Log[((x+I*y)^2-Pi^2)^2]],x^2-y^2!
> =Pi^2}}],
>  {x,-2Pi,2Pi},{y,-2Pi,2Pi},Mesh->False]
> Out[1]=...(output not shown here)
>
> In[2]:= ?Plot3D
> ...(output not shown here)
>
> In[3]:= Plot3D[Piecewise[{{Im[Log[((x+I*y)^2-Pi^2)^2]],x^2-y^2!
> =Pi^2}}],
>  {x,-2Pi,2Pi},{y,-2Pi,2Pi},Mesh->False]
>
> After a few seconds the kernel crashes...
>
> 3) The following line always crashes versions 5.2.0.0, 6.0.3.0,
> 7.0.1.0
>  & 8.0.0.0 of the kernel:
>
> FullSimplify[Limit[-(1/2)Log[1/#]-Log[I#]+Log[#]/2&[Complex[y,y]],
>  y->0]==-I*Pi/2]
>
> The following works (changed Complex[y,y] to y+I*y):
>
> FullSimplify[Limit[-(1/2)Log[1/#]-Log[I#]+Log[#]/2&[y+I*y],
>  y->0]==-I*Pi/2]
>
> Anyone else see this happen?



  • Prev by Date: Re: Problems integrating InterpolatingFunction
  • Next by Date: Re: Anyone know of a book on Mathematica suitable for 16-18year old?
  • Previous by thread: Re: MatrixPlot
  • Next by thread: Re: Repeatable ways to crash the MathKernel