Hey guys,

Iv been given the function:

V(x,y) = kx^2 + k[(y-x)^2] + ky^2

They say :

Write down a symetric matrix A such that V = (X^T)AX where X = (x,y)^T

T: Transpose of matrix.

Whaaaat the helll???

Thanks.

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- October 21st 2009, 06:08 PMoutspiredConverting A Function to Matrix...?
Hey guys,

Iv been given the function:

V(x,y) = kx^2 + k[(y-x)^2] + ky^2

They say :

Write down a symetric matrix A such that V = (X^T)AX where X = (x,y)^T

T: Transpose of matrix.

Whaaaat the helll???

Thanks. - October 21st 2009, 06:19 PMredsoxfan325
- October 21st 2009, 06:25 PMoutspired
Thanks man, i did something like that but it didnt come out like that. You just need to take the co-effients of the equation and match it with the equation determined by the multiplication....by the way, how did you know they were looking for a 2x2?

a = 2k

b+c = -2k => b=c=-k

d = 2k - October 21st 2009, 06:28 PMredsoxfan325
- October 21st 2009, 06:32 PMoutspired
Wow...i never saw it that way.

Thanks alot man...you've just given me 3 minutes of extra sleep...JOY.