- #1

- 8

- 0

[1 3]

[0 1]

Sqrt((11+sqrt(117))/2)

The 11 is the sqrt of 1

^{2}+ 3

^{2}+ 1

^{2}

the 2 is the root of 1 + 3 + 1, where does the plus sqrt(117) come from?

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- Thread starter Th3HoopMan
- Start date

- #1

- 8

- 0

[1 3]

[0 1]

Sqrt((11+sqrt(117))/2)

The 11 is the sqrt of 1

the 2 is the root of 1 + 3 + 1, where does the plus sqrt(117) come from?

- #2

DEvens

Education Advisor

Gold Member

- 1,203

- 459

1^2 + 3^2 + 1^2 is 11. In what sense is 11 the square root of that?

1 + 3 + 1 is 5. In what sense is 2 the square root of that?

Can you possibly re-state the definition of the norm you are using? The phrase "the square root of all the entry values" does not make sense. Do you mean, the square root of the sum of the squares of the matrix values?

http://en.wikipedia.org/wiki/Matrix_norm

Which matrix norm do you think you are using?

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