How do we know if we can use power iteration in a given matrix?












0












$begingroup$


I am trying to understand methods of computing eigenvectors other than using the characteristic polynomial and then using row reduction.



Wikipedia says that power iteration requires that the matrix for which we wish to compute eigenvalues must be diagonalisable.



Am I right in suggesting that diagobalisable means that it does not have an eigenvalue with algebraic multiplicity greater than geometric multiplicity?



If so, how can we tell if we can use power iteration on a matrix (how do we know that it is diagobalisable) without already knowing it’s eigenevectors? Will this method still work if the matrix does not have a dominant eigenvalue?



Thanks for your help.










share|cite|improve this question









$endgroup$

















    0












    $begingroup$


    I am trying to understand methods of computing eigenvectors other than using the characteristic polynomial and then using row reduction.



    Wikipedia says that power iteration requires that the matrix for which we wish to compute eigenvalues must be diagonalisable.



    Am I right in suggesting that diagobalisable means that it does not have an eigenvalue with algebraic multiplicity greater than geometric multiplicity?



    If so, how can we tell if we can use power iteration on a matrix (how do we know that it is diagobalisable) without already knowing it’s eigenevectors? Will this method still work if the matrix does not have a dominant eigenvalue?



    Thanks for your help.










    share|cite|improve this question









    $endgroup$















      0












      0








      0





      $begingroup$


      I am trying to understand methods of computing eigenvectors other than using the characteristic polynomial and then using row reduction.



      Wikipedia says that power iteration requires that the matrix for which we wish to compute eigenvalues must be diagonalisable.



      Am I right in suggesting that diagobalisable means that it does not have an eigenvalue with algebraic multiplicity greater than geometric multiplicity?



      If so, how can we tell if we can use power iteration on a matrix (how do we know that it is diagobalisable) without already knowing it’s eigenevectors? Will this method still work if the matrix does not have a dominant eigenvalue?



      Thanks for your help.










      share|cite|improve this question









      $endgroup$




      I am trying to understand methods of computing eigenvectors other than using the characteristic polynomial and then using row reduction.



      Wikipedia says that power iteration requires that the matrix for which we wish to compute eigenvalues must be diagonalisable.



      Am I right in suggesting that diagobalisable means that it does not have an eigenvalue with algebraic multiplicity greater than geometric multiplicity?



      If so, how can we tell if we can use power iteration on a matrix (how do we know that it is diagobalisable) without already knowing it’s eigenevectors? Will this method still work if the matrix does not have a dominant eigenvalue?



      Thanks for your help.







      linear-algebra eigenvalues-eigenvectors






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Dec 19 '18 at 6:11









      AndrewAndrew

      357213




      357213






















          0






          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%2f3046058%2fhow-do-we-know-if-we-can-use-power-iteration-in-a-given-matrix%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          0






          active

          oldest

          votes








          0






          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.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3046058%2fhow-do-we-know-if-we-can-use-power-iteration-in-a-given-matrix%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

          Bundesstraße 106

          Verónica Boquete

          Ida-Boy-Ed-Garten