Infinite matrices and the Trace function

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Discussion Overview

The discussion centers around the properties of the trace function in the context of infinite matrices, specifically questioning whether the property Tr(AB) = Tr(BA) holds in this scenario.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about the validity of the trace property for infinite matrices, drawing attention to the difference from finite matrices.
  • Another participant references a Wikipedia article to provide a coordinate-free definition of the trace, suggesting it may contain relevant information.
  • A third participant expresses uncertainty about whether the provided resources adequately address the original question.
  • Another suggestion is made to look up "trace class operator," indicating a potential avenue for further exploration of the topic.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on whether the trace property holds for infinite matrices, and multiple viewpoints and references are presented without resolution.

Contextual Notes

The discussion lacks clarity on the assumptions required for the trace function to be applicable to infinite matrices, and the relevance of the trace class operator is not fully explored.

LagrangeEuler
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For finite matrices ##A## and ##B## we have
Tr(AB)=Tr(BA)
What happens in case of infinite matrices?
 
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Sorry but I am not sure that there is an answer on my question.
 

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