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Matrix adjoint

  • Thread starter geffman1
  • Start date
  • #1
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hey guys, just need a little help. say your got a matrix
1 2
3 4

how do you find the adjoint, i can get the right numbers but i cant work out y the signs change. any help would be helpful. thanks guys.
 

Answers and Replies

  • #2
Dick
Science Advisor
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The adjoint is just the transpose, isn't it? Or are you talking about the adjugate? They are different.
 
  • #3
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i think its the transpose of the cofactor matrix
but i dunno how to get the cofactor matrix?? thanks
 
  • #4
Dick
Science Advisor
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That's actually the adjugate not the adjoint. Try the wikipedia entry http://en.wikipedia.org/wiki/Adjugate It's pretty good and not that hard. You can also look up cofactor matrix from the same source. Also nothing wrong with the entry. You can save me a lot of writing that way.
 

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