# Help with matrix trace

• December 7th 2012, 10:23 AM
Stormey
Help with matrix trace
Hi guys,

I need to prove that $tr(AB)=tr(BA)$

thank you so much in advanced!

edit:
$A,B\in F^{n\times n}$ of course...
• December 7th 2012, 02:58 PM
Zouzz
Re: Help with matrix trace
Well here you go, I hope it helps :D
• December 7th 2012, 03:22 PM
topsquark
Re: Help with matrix trace

-Dan
• December 7th 2012, 04:36 PM
Zouzz
Re: Help with matrix trace
Hmmm, me?
I guess I could use some () around my summations, but if I did make a fatal error, then I got temporarely blind. Would you mind pointing it out?
• December 8th 2012, 12:24 AM
Stormey
Re: Help with matrix trace
that is absolutley brilliant.
thank you so much, Zouzz. (Rock)