In econometric, I have to use this formula to compute the inverse matrix

where A is a , symmetric, nonsingular matrix; b,c are n-column vectors, c' is transpose of c.

I used it but I did know how to prove this formula. I need your help.

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- May 20th 2011, 03:59 PMmahefoProve the formula of inverse matrix
In econometric, I have to use this formula to compute the inverse matrix

where A is a , symmetric, nonsingular matrix; b,c are n-column vectors, c' is transpose of c.

I used it but I did know how to prove this formula. I need your help. - May 20th 2011, 08:59 PMFernandoRevilla
Have you tried

- May 21st 2011, 03:24 AMmahefo
I can prove it. But I can not explain it naturally. I do not know this formula is discovered from where.

- May 21st 2011, 10:46 AMDeveno
it is a special case of the Binomial Inverse Theorem, see here

- May 22nd 2011, 02:59 AMmahefo
- May 22nd 2011, 03:20 AMFernandoRevilla