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If y=Ax given, A's eigenvalues are 1 and -5, and each values' eigenvector are (1,1) and...

If y=Ax given, A's eigenvalues are 1 and -5, and each values' eigenvector are (1,1) and (1,-1), what can we tell about extension and contraction?

Can I say the field is extended to (1,1) direction with factor 1 & extended to (1,-1) direction with factor -5?

Should I use eigenvalue as absolute value to describe extension/contraction factor?

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