complex analysis : Growth












2












$begingroup$


Let $f$ holomorphic on $C$.



I'm looking for a counter exemple to : If $sup_{|z|=r} |Re(f)| = O(r^{d})$ then $sup_{|z|=r} |f| = O(r^{d})$



Actually, I'm wondering if I can find a entire function such as the growth of the real part is lower than the growth of the imaginary part.



Thank you for reading me :).










share|cite|improve this question









$endgroup$

















    2












    $begingroup$


    Let $f$ holomorphic on $C$.



    I'm looking for a counter exemple to : If $sup_{|z|=r} |Re(f)| = O(r^{d})$ then $sup_{|z|=r} |f| = O(r^{d})$



    Actually, I'm wondering if I can find a entire function such as the growth of the real part is lower than the growth of the imaginary part.



    Thank you for reading me :).










    share|cite|improve this question









    $endgroup$















      2












      2








      2





      $begingroup$


      Let $f$ holomorphic on $C$.



      I'm looking for a counter exemple to : If $sup_{|z|=r} |Re(f)| = O(r^{d})$ then $sup_{|z|=r} |f| = O(r^{d})$



      Actually, I'm wondering if I can find a entire function such as the growth of the real part is lower than the growth of the imaginary part.



      Thank you for reading me :).










      share|cite|improve this question









      $endgroup$




      Let $f$ holomorphic on $C$.



      I'm looking for a counter exemple to : If $sup_{|z|=r} |Re(f)| = O(r^{d})$ then $sup_{|z|=r} |f| = O(r^{d})$



      Actually, I'm wondering if I can find a entire function such as the growth of the real part is lower than the growth of the imaginary part.



      Thank you for reading me :).







      complex-analysis entire-functions






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Jan 5 at 18:03









      CechMSCechMS

      447




      447






















          1 Answer
          1






          active

          oldest

          votes


















          4












          $begingroup$

          It is a beautiful fact about entire functions that there is no counterexample to your claim! This is the Borel—Carathéodory theorem. (In the formulation on that web page, take $R=2r$ to deduce the exact form of your claim.)






          share|cite|improve this answer









          $endgroup$













            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%2f3062996%2fcomplex-analysis-growth%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            4












            $begingroup$

            It is a beautiful fact about entire functions that there is no counterexample to your claim! This is the Borel—Carathéodory theorem. (In the formulation on that web page, take $R=2r$ to deduce the exact form of your claim.)






            share|cite|improve this answer









            $endgroup$


















              4












              $begingroup$

              It is a beautiful fact about entire functions that there is no counterexample to your claim! This is the Borel—Carathéodory theorem. (In the formulation on that web page, take $R=2r$ to deduce the exact form of your claim.)






              share|cite|improve this answer









              $endgroup$
















                4












                4








                4





                $begingroup$

                It is a beautiful fact about entire functions that there is no counterexample to your claim! This is the Borel—Carathéodory theorem. (In the formulation on that web page, take $R=2r$ to deduce the exact form of your claim.)






                share|cite|improve this answer









                $endgroup$



                It is a beautiful fact about entire functions that there is no counterexample to your claim! This is the Borel—Carathéodory theorem. (In the formulation on that web page, take $R=2r$ to deduce the exact form of your claim.)







                share|cite|improve this answer












                share|cite|improve this answer



                share|cite|improve this answer










                answered Jan 5 at 18:15









                Greg MartinGreg Martin

                36.4k23565




                36.4k23565






























                    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%2f3062996%2fcomplex-analysis-growth%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

                    Bressuire

                    Cabo Verde

                    Gyllenstierna