*To*: mathgroup@smc.vnet.net*Subject*: [mg12151] Re: Problem with Eigenvalues[A]*From*: dreissNOSPAM@nospam.earthlink.net (David Reiss)*Date*: Mon, 27 Apr 1998 01:46:34 -0400*Organization*: EarthLink Network, Inc.*References*: <6hpf2v$deg@smc.vnet.net>

In article <6hpf2v$deg@smc.vnet.net>, "JNicolau" <nop60190@mail.telepac.pt> wrote: > I don't understand what is the problem with > > A={{a,0},{0,b}}; > Eigenvalues[A]; > > in the Mathematica 2.2 as I always have the message > > Eigenvectors::eival: Unable to find all roots of the characteristic > polynomial. > > I don't have the same problem with the Mathematica 2.0. I'd appreciate > if someone could tell me how I can solve this problem. > > > thank you all > > Joco Nicolau In Mathematica 2.2 I find, In[1]:= A={{a,0},{0,b}} Out[1]= {{a, 0}, {0, b}} In[2]:= Eigenvalues[A] Out[2]= {a, b} With no error messages. --David -- David Reiss dreissNOSPAM@nospam.earthlink.net http://home.earthlink.net/~dreiss To send personal email, remove the words "nospam" and "NOSPAM" from the email address