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Mathematik-Online problems:

Problem 531: Commutator

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
a)
Which matrices commute with

$\displaystyle A= \left(\begin{array}{cc} 2 & 1 \\ 1 & 2 \end{array}\right) \; ? $

b)
Which matrices commute with all $ n\times n$-matrices?
c)
Proof: If $ B$ commutes with $ A$, then $ B^{-1}$ commutes with $ A$.
(Authors: Höllig/Höfert)

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  automatisch erstellt am 12.  3. 2018