Given any matrix $A$, does there exist a symplectic transformation such that $P^TAP=B$ where B is block...












0












$begingroup$


Given any $2ntimes 2n$ matrix $A$, does there always exist a symplectic transformation such that $P^TAP=B$ where B is block diagonal? where
$$
B=begin{bmatrix}
B_1&0&cdots&0\
0&B_2&cdots&0\
0&cdots&ddots&vdots\
0&0&cdots&B_n
end{bmatrix}
$$



and
$$
B_i=begin{bmatrix}
0&lambda_i\-lambda_i&0
end{bmatrix}
$$

By
saying that $P$ is matrix associated with above symplectic transformation, we mean that $P$ satisfy the condition of $P^TJP=J$, where



$$
J=begin{bmatrix}
J_0&0&cdots&0\
0&J_0&cdots&0\
0&cdots&ddots&vdots\
0&0&cdots&J_0
end{bmatrix}
$$



and
$$
J_0=begin{bmatrix}
0&1\-1&0
end{bmatrix}
$$










share|cite|improve this question









$endgroup$

















    0












    $begingroup$


    Given any $2ntimes 2n$ matrix $A$, does there always exist a symplectic transformation such that $P^TAP=B$ where B is block diagonal? where
    $$
    B=begin{bmatrix}
    B_1&0&cdots&0\
    0&B_2&cdots&0\
    0&cdots&ddots&vdots\
    0&0&cdots&B_n
    end{bmatrix}
    $$



    and
    $$
    B_i=begin{bmatrix}
    0&lambda_i\-lambda_i&0
    end{bmatrix}
    $$

    By
    saying that $P$ is matrix associated with above symplectic transformation, we mean that $P$ satisfy the condition of $P^TJP=J$, where



    $$
    J=begin{bmatrix}
    J_0&0&cdots&0\
    0&J_0&cdots&0\
    0&cdots&ddots&vdots\
    0&0&cdots&J_0
    end{bmatrix}
    $$



    and
    $$
    J_0=begin{bmatrix}
    0&1\-1&0
    end{bmatrix}
    $$










    share|cite|improve this question









    $endgroup$















      0












      0








      0


      1



      $begingroup$


      Given any $2ntimes 2n$ matrix $A$, does there always exist a symplectic transformation such that $P^TAP=B$ where B is block diagonal? where
      $$
      B=begin{bmatrix}
      B_1&0&cdots&0\
      0&B_2&cdots&0\
      0&cdots&ddots&vdots\
      0&0&cdots&B_n
      end{bmatrix}
      $$



      and
      $$
      B_i=begin{bmatrix}
      0&lambda_i\-lambda_i&0
      end{bmatrix}
      $$

      By
      saying that $P$ is matrix associated with above symplectic transformation, we mean that $P$ satisfy the condition of $P^TJP=J$, where



      $$
      J=begin{bmatrix}
      J_0&0&cdots&0\
      0&J_0&cdots&0\
      0&cdots&ddots&vdots\
      0&0&cdots&J_0
      end{bmatrix}
      $$



      and
      $$
      J_0=begin{bmatrix}
      0&1\-1&0
      end{bmatrix}
      $$










      share|cite|improve this question









      $endgroup$




      Given any $2ntimes 2n$ matrix $A$, does there always exist a symplectic transformation such that $P^TAP=B$ where B is block diagonal? where
      $$
      B=begin{bmatrix}
      B_1&0&cdots&0\
      0&B_2&cdots&0\
      0&cdots&ddots&vdots\
      0&0&cdots&B_n
      end{bmatrix}
      $$



      and
      $$
      B_i=begin{bmatrix}
      0&lambda_i\-lambda_i&0
      end{bmatrix}
      $$

      By
      saying that $P$ is matrix associated with above symplectic transformation, we mean that $P$ satisfy the condition of $P^TJP=J$, where



      $$
      J=begin{bmatrix}
      J_0&0&cdots&0\
      0&J_0&cdots&0\
      0&cdots&ddots&vdots\
      0&0&cdots&J_0
      end{bmatrix}
      $$



      and
      $$
      J_0=begin{bmatrix}
      0&1\-1&0
      end{bmatrix}
      $$







      linear-algebra diagonalization symplectic-geometry block-matrices






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Nov 27 '18 at 23:42









      MclalalalaMclalalala

      1269




      1269






















          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%2f3016494%2fgiven-any-matrix-a-does-there-exist-a-symplectic-transformation-such-that-p%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%2f3016494%2fgiven-any-matrix-a-does-there-exist-a-symplectic-transformation-such-that-p%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

          mysqli_query(): Empty query in /home/lucindabrummitt/public_html/blog/wp-includes/wp-db.php on line 1924

          How to change which sound is reproduced for terminal bell?

          Can I use Tabulator js library in my java Spring + Thymeleaf project?