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## Homework Statement

prove the idendity [tex] \sigma \times \sigma =i \sigma [/tex] where [tex] \sigma[/tex] is Pauli Spin matrices

## Homework Equations

## The Attempt at a Solution

This is how I did..and I am getting

2[tex] i \sigma [/tex] instead of [tex] i\sigma [/tex].

http://i146.photobucket.com/albums/r273/soorajr/paulimatrix.jpg

This question was asked twice for the university exam, and during both times, they asked us to prove [tex] \sigma \times \sigma =i \sigma [/tex].

Did i make any mistake? or the examiner was wrong?

Thanks in advance.

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