jordan normal form{{2, 1, -2, -1},{ 1 , 0 , 0 , 0} ,{ 0 , 1 , 0 , 0 }, {0 , 0 , 1, 0 }}

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.