Kavish Aijaz Ansari posted an MCQ
January 02, 2021 • 17:47 pm 30 points
  • IIT JAM
  • Mathematics (MA)

Every diagonal matrix commutes with all matrix of same order under matrix multiplication.

please explain, if there is any special condition.

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  • comment-profile-img>
    Satpal singh

    see the attachment according to me option C is correct.the other matrix must be diagonal only.

    CamScanner 01-02-2021 12.25.15.pdf
  • comment-profile-img>
    Sonu saini

    because only scalar matrix commute not every diagonal matrix commute....

  • Anonymous User Best Answer

    https://math.stackexchange.com/questions/1697991/do-diagonal-matrices-always-commute

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