How to show that eigenvalues of AB and BA are same?











up vote
0
down vote

favorite












Let $A$ be an $mtimes n$ matrix and $B$ be an $ntimes m$ matrix. How to use Jordan canonical form to prove the matrix shown below are similar.
Given matrices are $$begin{bmatrix} AB&0\ B&0end{bmatrix}$$ and $$begin{bmatrix} 0&0\ B&BAend{bmatrix}$$
How to find their Jordan forms? I have no idea.










share|cite|improve this question
























  • No need to use any Jordan form. See, e.g., here.
    – Algebraic Pavel
    Nov 23 at 15:21















up vote
0
down vote

favorite












Let $A$ be an $mtimes n$ matrix and $B$ be an $ntimes m$ matrix. How to use Jordan canonical form to prove the matrix shown below are similar.
Given matrices are $$begin{bmatrix} AB&0\ B&0end{bmatrix}$$ and $$begin{bmatrix} 0&0\ B&BAend{bmatrix}$$
How to find their Jordan forms? I have no idea.










share|cite|improve this question
























  • No need to use any Jordan form. See, e.g., here.
    – Algebraic Pavel
    Nov 23 at 15:21













up vote
0
down vote

favorite









up vote
0
down vote

favorite











Let $A$ be an $mtimes n$ matrix and $B$ be an $ntimes m$ matrix. How to use Jordan canonical form to prove the matrix shown below are similar.
Given matrices are $$begin{bmatrix} AB&0\ B&0end{bmatrix}$$ and $$begin{bmatrix} 0&0\ B&BAend{bmatrix}$$
How to find their Jordan forms? I have no idea.










share|cite|improve this question















Let $A$ be an $mtimes n$ matrix and $B$ be an $ntimes m$ matrix. How to use Jordan canonical form to prove the matrix shown below are similar.
Given matrices are $$begin{bmatrix} AB&0\ B&0end{bmatrix}$$ and $$begin{bmatrix} 0&0\ B&BAend{bmatrix}$$
How to find their Jordan forms? I have no idea.







matrices eigenvalues-eigenvectors jordan-normal-form






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Nov 23 at 12:13









GNUSupporter 8964民主女神 地下教會

12.8k72445




12.8k72445










asked Nov 23 at 11:50









Mittal G

1,192515




1,192515












  • No need to use any Jordan form. See, e.g., here.
    – Algebraic Pavel
    Nov 23 at 15:21


















  • No need to use any Jordan form. See, e.g., here.
    – Algebraic Pavel
    Nov 23 at 15:21
















No need to use any Jordan form. See, e.g., here.
– Algebraic Pavel
Nov 23 at 15:21




No need to use any Jordan form. See, e.g., here.
– Algebraic Pavel
Nov 23 at 15:21















active

oldest

votes











Your Answer





StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "69"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3010266%2fhow-to-show-that-eigenvalues-of-ab-and-ba-are-same%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown






























active

oldest

votes













active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Mathematics Stack Exchange!


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


Use MathJax to format equations. MathJax reference.


To learn more, see our tips on writing great answers.





Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


Please pay close attention to the following guidance:


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3010266%2fhow-to-show-that-eigenvalues-of-ab-and-ba-are-same%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

Ellipse (mathématiques)

Quarter-circle Tiles

Mont Emei