13. Similarity and congruence. Real symmetric matrices
13.1 General
Here we examine the link between similarity and congruence. The orthogonal group is defined by
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Two real matrices A and B conjugate under the action of O (n) are both similar and congruent: the properties invariant by similarity and congruence are preserved for A and B.
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Similarity and congruence. Real symmetric matrices
A few summary examples
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