Properties of Inverse Lambert W function












3












$begingroup$


Starting with the two-branched Lambert W function (from Wikipedia):





Suppose we just flip it like this:





Is there a single power series for this $y=W^{-1}(x)$?










share|cite|improve this question











$endgroup$

















    3












    $begingroup$


    Starting with the two-branched Lambert W function (from Wikipedia):





    Suppose we just flip it like this:





    Is there a single power series for this $y=W^{-1}(x)$?










    share|cite|improve this question











    $endgroup$















      3












      3








      3


      1



      $begingroup$


      Starting with the two-branched Lambert W function (from Wikipedia):





      Suppose we just flip it like this:





      Is there a single power series for this $y=W^{-1}(x)$?










      share|cite|improve this question











      $endgroup$




      Starting with the two-branched Lambert W function (from Wikipedia):





      Suppose we just flip it like this:





      Is there a single power series for this $y=W^{-1}(x)$?







      special-functions






      share|cite|improve this question















      share|cite|improve this question













      share|cite|improve this question




      share|cite|improve this question








      edited Jan 1 at 10:46









      Glorfindel

      3,41981830




      3,41981830










      asked Aug 14 '11 at 22:01









      deoxygerbedeoxygerbe

      3,06711736




      3,06711736






















          1 Answer
          1






          active

          oldest

          votes


















          14












          $begingroup$

          Lambert W function, $y=W(x)$ is a solution for $y mathrm{e}^y = x$. Hence $W^{-1}(y) = y mathrm{e}^y$.






          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%2f57466%2fproperties-of-inverse-lambert-w-function%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









            14












            $begingroup$

            Lambert W function, $y=W(x)$ is a solution for $y mathrm{e}^y = x$. Hence $W^{-1}(y) = y mathrm{e}^y$.






            share|cite|improve this answer









            $endgroup$


















              14












              $begingroup$

              Lambert W function, $y=W(x)$ is a solution for $y mathrm{e}^y = x$. Hence $W^{-1}(y) = y mathrm{e}^y$.






              share|cite|improve this answer









              $endgroup$
















                14












                14








                14





                $begingroup$

                Lambert W function, $y=W(x)$ is a solution for $y mathrm{e}^y = x$. Hence $W^{-1}(y) = y mathrm{e}^y$.






                share|cite|improve this answer









                $endgroup$



                Lambert W function, $y=W(x)$ is a solution for $y mathrm{e}^y = x$. Hence $W^{-1}(y) = y mathrm{e}^y$.







                share|cite|improve this answer












                share|cite|improve this answer



                share|cite|improve this answer










                answered Aug 14 '11 at 22:15









                SashaSasha

                60.5k5107179




                60.5k5107179






























                    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%2f57466%2fproperties-of-inverse-lambert-w-function%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

                    'app-layout' is not a known element: how to share Component with different Modules

                    android studio warns about leanback feature tag usage required on manifest while using Unity exported app?

                    WPF add header to Image with URL pettitions [duplicate]