A 3x3 Symmetric Eigenvalue Decomposition in under 3 Minutes!

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This dude here just calculated eigenvalues on the fly and here I'm wasting my ink.

vaibhavsingh
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eigenvalues by inspection? what's the secret shortcut? which video has the pre requisite??

elachichai
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This all of the sudden became so much more simple, thank you!

joshuasorell
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Honestly, if you would have made the video 2 minutes longer and would've explained where the 2/sqrt(6) came from I wouldn't have wasted my time and you would've taught me something. Sadly that's not really the case now.

Momo-idky
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When lamba equals 2, then the eigen vector is -2 1 1 how did you get 2 -1 -1 ? Can you pls explain that sir ?

vinkrishx
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Which is the video for the determinant trick? Thank you!

RahulThakkar
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How does he know that the eigenvector corresponding to 0 is (0 1 -1)/sqrt(2) ? I see that this vector is orthogonal to the other one but why not choose (1 -1 0)/sqrt(2) instead?

Peters-lxlt
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From 2014 you become more "cool", i like it.

TrafalgarLaw