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.
kernel {{0, 1, 0}, {-1, 0, 2}, {0, -1, 0}, {0, 0, -1}}
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random