If A and B are both orthogonal nxn matrices.

Can anyone show That AB is orthogonal...

Thanks

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- Apr 21st 2006, 06:40 AMdopiOrthogonal
If A and B are both orthogonal nxn matrices.

Can anyone show That AB is orthogonal...

Thanks - Apr 21st 2006, 11:57 AMdopiOrthogonal problem
If A and B are both orthogonal nxn matrices.

Can anyone show That AB is orthogonal...iv been stuck on this question for a while now

Thanks - Apr 21st 2006, 12:19 PMCaptainBlackQuote:

Originally Posted by**dopi**

Now suppose and be orthogonal, and let

. Now , so:

Hence is orthogonal.

RonL - Apr 21st 2006, 01:40 PMdopiQuote:

Originally Posted by**CaptainBlack**

Say if you add A and B (A+B)...would that be Orthognal? - Apr 21st 2006, 10:07 PMCaptainBlackQuote:

Originally Posted by**dopi**

RonL - Apr 22nd 2006, 02:26 AMTD!
From the definition, we have for A and B:

- Apr 22nd 2006, 03:19 AMCaptainBlackDon't make duplicate posts
Don't post the same question in two different fora.

I have merged these two because they both have responses.

RonL - Apr 22nd 2006, 03:26 AMCaptainBlackQuote:

Originally Posted by**TD!**

RonL