matrix multiplication


by EvLer
Tags: matrix, multiplication
EvLer
EvLer is offline
#1
Apr27-05, 04:59 PM
P: 460
Ok, maybe a dumb question, but anyway:
if I have some matrices equation like this:

AB = BC

if I want to multiply both sides by some matrix Z can I stick it in the middle?

AZB = BZC

I know I can do these two:

ABZ = BCZ
ZAB = ZBC

but can I do the middle too?

Thanks!
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Hurkyl
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#2
Apr27-05, 05:10 PM
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Have you tried some examples to see if it works?
EvLer
EvLer is offline
#3
Apr27-05, 05:22 PM
P: 460
Quote Quote by Hurkyl
Have you tried some examples to see if it works?
no
but the proof worked out nice, so I am wondering if I am actually not doing it right.
Good point.
I just rely on the fact that people here know everything and know it off top of their heads, so it would save me trouble
But usually, I make an effort before I ask here. I am just pressed for time: reviewing before finals.


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