- Thread starter
- #1

#### OhMyMarkov

##### Member

- Mar 5, 2012

- 83

I'm struggling to find a general formula for obtaining an inverse of a symmetric matrix, for e.g.

1 i -1

i -i 2

-1 2 1

Any help is appreciated!

- Thread starter OhMyMarkov
- Start date

- Thread starter
- #1

- Mar 5, 2012

- 83

I'm struggling to find a general formula for obtaining an inverse of a symmetric matrix, for e.g.

1 i -1

i -i 2

-1 2 1

Any help is appreciated!

- Feb 5, 2012

- 1,621

Hi OhMyMarkov,

I'm struggling to find a general formula for obtaining an inverse of a symmetric matrix, for e.g.

1 i -1

i -i 2

-1 2 1

Any help is appreciated!

Are you specifically concerned about 3x3 symmetric matrices? The general form of the inverse of a 3x3 matrix is given >>here<<. For a symmetric matrix \(b=d,\,c=g\mbox{ and } f=h\).

Kind Regards,

Sudharaka.

- Thread starter
- #3

- Mar 5, 2012

- 83

Well, I'm actually interested in symmetric matrices that have this shape (the given example is for a 3x3 matrix):

1 1 1

1 2 4

1 4 16

Note that the coefficients need not be real.