Similarity invariance
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In mathematics, similarity invariance is a property exhibited by a function whose value is unchanged under similarities of its domain. That is, f is invariant under similarities if f(A) = f(B − 1AB) where B − 1AB is a similarity of A. Examples of such functions include the trace, determinant, and the minimum polynomial. A more colloquial phrase that means the same thing as similarity invariance is "basis independence."
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