Re: Root function
- To: mathgroup at smc.vnet.net
- Subject: [mg51043] Re: Root function
- From: p-valko at tamu.edu (Peter Valko)
- Date: Sat, 2 Oct 2004 03:18:47 -0400 (EDT)
- References: <cjj7gq$bp2$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Use a decimal point: Eigensystem[{{-1., 1, 0, 0}, {1, -2, 1, 0}, {0, 1, -2, 0}, {0, 0, 1, 0}}] Regards Peter Ben <bmauer at wisc.edu> wrote in message news:<cjj7gq$bp2$1 at smc.vnet.net>... > When I try to diagonalize this matrix in mathematica 5: > Eigensystem[{{-1, 1, 0, 0}, {1, -2, 1, 0}, {0, 1, -2, 0}, {0, 0, 1, 0}}] > I get this ugly mess > > \!\({{Root[1 + 6\ #1 + 5\ #1\^2 + #1\^3 &, 1], Root[1 + 6\ #1 + > 5\ #1\^2 + #1\^3 &, 2], Root[ > 1 + 6\ #1 + 5\ #1\^2 + #1\^3 &, 3], 0}, {{\(-1\) - 3\ > Root[1 + 6\ #1 + 5\ #1\^2 + #1\^3 &, 1] - Root[1 + 6\ #1 + > etc etc etc > > Mathematica 4 gives me the right answer. > How do I get v5 to not spit this out and what does it mean?