Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
((4/3, 0, -2/3),(0, 4/3, -2/3),(-2/3, -2/3, 2/3))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random