Re: Mathematica bug??
- To: mathgroup at smc.vnet.net
- Subject: [mg100562] Re: Mathematica bug??
- From: "VMCM1905" <VMCM1905 at gmail.com>
- Date: Mon, 8 Jun 2009 02:05:57 -0400 (EDT)
- References: <h0fvlb$rct$1@smc.vnet.net>
"oshaughn" <oshaughn at gravity.psu.edu> wrote in message news:h0fvlb$rct$1 at smc.vnet.net... > {{Sqrt[1 - 2/r], 0, 0, 0}, {0, 1/Sqrt[1 - 2/r], 0, 0}, {0, 0, r, > 0}, {0, 0, 0, r Sin[\[Theta]]}} // Inverse > > gives > > {{0, 0, 0, 0}, {0, 0, 0, 0}, {0, 0, 1/r, 0}, {0, 0, 0, Csc[\[Theta]]/ > r}} > > with no warnings. This is a *diagonal* matrix that should be > trivially invertible. > Works for me. I get: {{1/Sqrt[1 - 2/r], 0, 0, 0}, {0, Sqrt[1 - 2/r], 0, 0}, {0, 0, 1/r, 0}, {0, 0, 0, Csc[\[Theta]]/r}} What version are you using? Have you cleared any variables? Try rebooting the kernal.