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- Newsgroups: sci.math
- Path: sparky!uunet!munnari.oz.au!uniwa!ycchin
- From: ycchin@tartarus.uwa.edu.au (Chin Yih Chong)
- Subject: Help needed for a Proof
- Message-ID: <1992Jul25.062401.29682@uniwa.uwa.edu.au>
- Summary: The proof of a determinant formula
- Keywords: Help
- Sender: news@uniwa.uwa.edu.au (USENET News System)
- Nntp-Posting-Host: tartarus.uwa.edu.au
- Organization: University of Western Australia
- Date: Sat, 25 Jul 1992 06:24:01 GMT
- Lines: 28
-
- Recently, I came across a very useful formula for finding determinant,
- and It goes something like this:
-
- Given an n*n square matrix | A B |
- | C D |
-
- where A is of dimension r*r and D is of dimension s*s, such that
- r>0,s>0 and r + s = n, then
-
- det | A B | = det(D)*det(A - B*R*C) , where R = inverse of D
- | C D |
-
- Can anyone enlighten me on the proof of this formula.....
- Any help is greatly appreciated.
-
-
- ^ ^
- O O
- ^^
- \__/
- CHIN Thank you in advance!
-
- email address: ycchin@tartarus.uwa.edu.au
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