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16 years ago
#1
Hi

When you find 3 eigen values and then 3 corresponding eigen vectors for a matrix, where you normalise them and form a 3x3 matrix (from the eigen vectors) does it matter in which order you put the 3 eignevectors you found?

Thanks
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16 years ago
#2
nope. it doesn't matter. if u wanna verify that it doesn't matter then just see what happens if u put them in different order. it should not affect anything. anyway good luck for p6 on monday
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16 years ago
#3

Just to confirm a second case.

Does the order in which you put eigen veectors also not matter in the following question:

Find an orthogonal matrix P such that P(to the T)AP diagonalises the symmetric matrix A, where A = bla bla (3x3 matrix)

Does its not matter which order you pu the eigne vectors in.

However when you evaluate P(to the T)AP will be a different. It should be all zeros apart from the leading diagonal which will the be eigenvalues, will it matter if they are in different places.

Btw P(to the T) - i mean the transpose of P.

Many thanks,
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