= Commutation theorem for traces
{wiki=Commutation_theorem_for_traces}
The commutation theorem for traces is a result in linear algebra and functional analysis, particularly within the context of operator theory. It deals with the properties of the trace operator, which is a map that takes a square matrix (or, more generally, a bounded operator on a Hilbert space) and sums its diagonal elements. The commutation theorem states that if two operators \\( A \\) and \\( B \\) commute (i.e.
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