Question

HOW DO YOU FIND THE NORM OF A MATRIX?

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

thanks

Answer 3

has to do with absolute values

Answer 4

yea, I know that, but I was looking for a formula

Answer 5

there are many formulas. about 5 or 6 that will show that

Answer 6

could you show me one, or tell me where one is on this website?

Answer 7

\[\left| A \right| > 0 when A \neq 0 and \left| A \right| =0 if A=0\]

Answer 8

\[\left| A+B \right| \le \left| A \right|+\left| B \right|\]

Answer 9

are two

Answer 10

right but if I have a 2x2 matrix with four entries, how do I calculate the norm?

Answer 11

kind of like if I have a vector it is shown that you can calculate the norm by taking the square root of the each of the entries squared

Answer 12

sqrtx^2 equals sqrtx*sqrtx

Answer 13

\[\sqrt x * \sqrt x = \sqrt x^2 = x\]

Answer 14

make sense?

Answer 15

is x the norm?

Answer 16

or is x the matrix?

Answer 17

never mind, I get it

Answer 18

i wouldn't know the particular wording... lol but the equation makes sense right?

Answer 19

Yea, Thank You very much

Answer 20

:)

Answer 21

click good answer please :)

Answer 22

where is it?

Answer 23

next to my name. :) it closes out the question as it's been answered.

Answer 24

Got it

Answer 25

lol, sorry it took so long

Answer 26

it's okay. that way it just takes it off the unanswered questions list :) stick around and enjoy the site

Answer 27

@djswanson- i would like to add that the norm u wer talking about is called EUCLEDIAN NORM ........

@basketmath - there are many other norms for a matrix like :
1) taking maximum from the matrix ( highest magnitude)
2) thr is something called Frobenius Norm.
etc. etc....
Hope this clarifies any other doubt of yours about NORMS as defined for MATRICES.