Why won't this compile? Argument of h has an extra {












7















documentclass{article}
usepackage{amsmath}

begin{document}
newcommand{x}[1][1]{ensuremath{a_{n-#1}}}
newcommand{e}[1][left(1+dfrac{1+sqrt{5}}{2}right)-left(dfrac{1-sqrt{5}}{2}right)^{n-2}left(1+dfrac{1-sqrt{5}}{2}right)]{ensuremath{\\=dfrac{left(dfrac{1+sqrt{5}}{2}right) ^{n-2}#1}{sqrt{5}}}}
newcommand{f}{ensuremath{left(dfrac{1-sqrt{5}}{2}right)^{n-2}}}
newcommand{g}[1][n-1]{ensuremath{left(dfrac{1-sqrt{5}}{2}right)^{#1}}}
newcommand{h}[1][n-1]{ensuremath{left(dfrac{1+sqrt{5}}{2}right)^{#1}}}
newcommand{n}{ensuremath{left(dfrac{1+sqrt{5}}{2}right) ^{n-2}}}



$a_n=x+x[2]e[-f+hg]ee[h[2]]$



end{document}









share|improve this question









New contributor




Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

























    7















    documentclass{article}
    usepackage{amsmath}

    begin{document}
    newcommand{x}[1][1]{ensuremath{a_{n-#1}}}
    newcommand{e}[1][left(1+dfrac{1+sqrt{5}}{2}right)-left(dfrac{1-sqrt{5}}{2}right)^{n-2}left(1+dfrac{1-sqrt{5}}{2}right)]{ensuremath{\\=dfrac{left(dfrac{1+sqrt{5}}{2}right) ^{n-2}#1}{sqrt{5}}}}
    newcommand{f}{ensuremath{left(dfrac{1-sqrt{5}}{2}right)^{n-2}}}
    newcommand{g}[1][n-1]{ensuremath{left(dfrac{1-sqrt{5}}{2}right)^{#1}}}
    newcommand{h}[1][n-1]{ensuremath{left(dfrac{1+sqrt{5}}{2}right)^{#1}}}
    newcommand{n}{ensuremath{left(dfrac{1+sqrt{5}}{2}right) ^{n-2}}}



    $a_n=x+x[2]e[-f+hg]ee[h[2]]$



    end{document}









    share|improve this question









    New contributor




    Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      7












      7








      7








      documentclass{article}
      usepackage{amsmath}

      begin{document}
      newcommand{x}[1][1]{ensuremath{a_{n-#1}}}
      newcommand{e}[1][left(1+dfrac{1+sqrt{5}}{2}right)-left(dfrac{1-sqrt{5}}{2}right)^{n-2}left(1+dfrac{1-sqrt{5}}{2}right)]{ensuremath{\\=dfrac{left(dfrac{1+sqrt{5}}{2}right) ^{n-2}#1}{sqrt{5}}}}
      newcommand{f}{ensuremath{left(dfrac{1-sqrt{5}}{2}right)^{n-2}}}
      newcommand{g}[1][n-1]{ensuremath{left(dfrac{1-sqrt{5}}{2}right)^{#1}}}
      newcommand{h}[1][n-1]{ensuremath{left(dfrac{1+sqrt{5}}{2}right)^{#1}}}
      newcommand{n}{ensuremath{left(dfrac{1+sqrt{5}}{2}right) ^{n-2}}}



      $a_n=x+x[2]e[-f+hg]ee[h[2]]$



      end{document}









      share|improve this question









      New contributor




      Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      documentclass{article}
      usepackage{amsmath}

      begin{document}
      newcommand{x}[1][1]{ensuremath{a_{n-#1}}}
      newcommand{e}[1][left(1+dfrac{1+sqrt{5}}{2}right)-left(dfrac{1-sqrt{5}}{2}right)^{n-2}left(1+dfrac{1-sqrt{5}}{2}right)]{ensuremath{\\=dfrac{left(dfrac{1+sqrt{5}}{2}right) ^{n-2}#1}{sqrt{5}}}}
      newcommand{f}{ensuremath{left(dfrac{1-sqrt{5}}{2}right)^{n-2}}}
      newcommand{g}[1][n-1]{ensuremath{left(dfrac{1-sqrt{5}}{2}right)^{#1}}}
      newcommand{h}[1][n-1]{ensuremath{left(dfrac{1+sqrt{5}}{2}right)^{#1}}}
      newcommand{n}{ensuremath{left(dfrac{1+sqrt{5}}{2}right) ^{n-2}}}



      $a_n=x+x[2]e[-f+hg]ee[h[2]]$



      end{document}






      compilation-error






      share|improve this question









      New contributor




      Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









      New contributor




      Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question








      edited yesterday







      Seven













      New contributor




      Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked yesterday









      SevenSeven

      384




      384




      New contributor




      Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Seven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






















          2 Answers
          2






          active

          oldest

          votes


















          6














          use



          e[{h[n-1]}] 


          Put the inner h[..] into braces






          share|improve this answer































            4














            If you define commands with optional argument through xparse, then you can nest them.



            documentclass{article}
            usepackage{amsmath}
            usepackage{xparse}

            newcommand{grplus}{dfrac{1+sqrt{5}}{2}}
            newcommand{grminus}{dfrac{1-sqrt{5}}{2}}

            newcommand{eopt}{%
            left(1+grplusright)-fleft(1+grminusright)%
            }

            NewDocumentCommand{x}{O{1}}{a_{n-#1}}
            NewDocumentCommand{e}{O{eopt}}{\&=dfrac{n #1}{sqrt{5}}}

            NewDocumentCommand{g}{O{n-1}}{left(grminusright)^{#1}}
            NewDocumentCommand{h}{O{n-1}}{left(grplusright)^{#1}}

            newcommand{n}{g[n-2]}
            newcommand{f}{h[n-2]}

            begin{document}

            $begin{aligned}[t]
            a_n&=x+x[2]e[-f+hg]ee[h[2]]
            end{aligned}$


            I also used aligned in order to get a better alignment.



            enter image description here



            There's no reason for plaguing you code with useless ensuremath.






            share|improve this answer























              Your Answer








              StackExchange.ready(function() {
              var channelOptions = {
              tags: "".split(" "),
              id: "85"
              };
              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: false,
              noModals: true,
              showLowRepImageUploadWarning: true,
              reputationToPostImages: null,
              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
              },
              onDemand: true,
              discardSelector: ".discard-answer"
              ,immediatelyShowMarkdownHelp:true
              });


              }
              });






              Seven is a new contributor. Be nice, and check out our Code of Conduct.










              draft saved

              draft discarded


















              StackExchange.ready(
              function () {
              StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f479771%2fwhy-wont-this-compile-argument-of-h-has-an-extra%23new-answer', 'question_page');
              }
              );

              Post as a guest















              Required, but never shown

























              2 Answers
              2






              active

              oldest

              votes








              2 Answers
              2






              active

              oldest

              votes









              active

              oldest

              votes






              active

              oldest

              votes









              6














              use



              e[{h[n-1]}] 


              Put the inner h[..] into braces






              share|improve this answer




























                6














                use



                e[{h[n-1]}] 


                Put the inner h[..] into braces






                share|improve this answer


























                  6












                  6








                  6







                  use



                  e[{h[n-1]}] 


                  Put the inner h[..] into braces






                  share|improve this answer













                  use



                  e[{h[n-1]}] 


                  Put the inner h[..] into braces







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered yesterday









                  HerbertHerbert

                  276k25419732




                  276k25419732























                      4














                      If you define commands with optional argument through xparse, then you can nest them.



                      documentclass{article}
                      usepackage{amsmath}
                      usepackage{xparse}

                      newcommand{grplus}{dfrac{1+sqrt{5}}{2}}
                      newcommand{grminus}{dfrac{1-sqrt{5}}{2}}

                      newcommand{eopt}{%
                      left(1+grplusright)-fleft(1+grminusright)%
                      }

                      NewDocumentCommand{x}{O{1}}{a_{n-#1}}
                      NewDocumentCommand{e}{O{eopt}}{\&=dfrac{n #1}{sqrt{5}}}

                      NewDocumentCommand{g}{O{n-1}}{left(grminusright)^{#1}}
                      NewDocumentCommand{h}{O{n-1}}{left(grplusright)^{#1}}

                      newcommand{n}{g[n-2]}
                      newcommand{f}{h[n-2]}

                      begin{document}

                      $begin{aligned}[t]
                      a_n&=x+x[2]e[-f+hg]ee[h[2]]
                      end{aligned}$


                      I also used aligned in order to get a better alignment.



                      enter image description here



                      There's no reason for plaguing you code with useless ensuremath.






                      share|improve this answer




























                        4














                        If you define commands with optional argument through xparse, then you can nest them.



                        documentclass{article}
                        usepackage{amsmath}
                        usepackage{xparse}

                        newcommand{grplus}{dfrac{1+sqrt{5}}{2}}
                        newcommand{grminus}{dfrac{1-sqrt{5}}{2}}

                        newcommand{eopt}{%
                        left(1+grplusright)-fleft(1+grminusright)%
                        }

                        NewDocumentCommand{x}{O{1}}{a_{n-#1}}
                        NewDocumentCommand{e}{O{eopt}}{\&=dfrac{n #1}{sqrt{5}}}

                        NewDocumentCommand{g}{O{n-1}}{left(grminusright)^{#1}}
                        NewDocumentCommand{h}{O{n-1}}{left(grplusright)^{#1}}

                        newcommand{n}{g[n-2]}
                        newcommand{f}{h[n-2]}

                        begin{document}

                        $begin{aligned}[t]
                        a_n&=x+x[2]e[-f+hg]ee[h[2]]
                        end{aligned}$


                        I also used aligned in order to get a better alignment.



                        enter image description here



                        There's no reason for plaguing you code with useless ensuremath.






                        share|improve this answer


























                          4












                          4








                          4







                          If you define commands with optional argument through xparse, then you can nest them.



                          documentclass{article}
                          usepackage{amsmath}
                          usepackage{xparse}

                          newcommand{grplus}{dfrac{1+sqrt{5}}{2}}
                          newcommand{grminus}{dfrac{1-sqrt{5}}{2}}

                          newcommand{eopt}{%
                          left(1+grplusright)-fleft(1+grminusright)%
                          }

                          NewDocumentCommand{x}{O{1}}{a_{n-#1}}
                          NewDocumentCommand{e}{O{eopt}}{\&=dfrac{n #1}{sqrt{5}}}

                          NewDocumentCommand{g}{O{n-1}}{left(grminusright)^{#1}}
                          NewDocumentCommand{h}{O{n-1}}{left(grplusright)^{#1}}

                          newcommand{n}{g[n-2]}
                          newcommand{f}{h[n-2]}

                          begin{document}

                          $begin{aligned}[t]
                          a_n&=x+x[2]e[-f+hg]ee[h[2]]
                          end{aligned}$


                          I also used aligned in order to get a better alignment.



                          enter image description here



                          There's no reason for plaguing you code with useless ensuremath.






                          share|improve this answer













                          If you define commands with optional argument through xparse, then you can nest them.



                          documentclass{article}
                          usepackage{amsmath}
                          usepackage{xparse}

                          newcommand{grplus}{dfrac{1+sqrt{5}}{2}}
                          newcommand{grminus}{dfrac{1-sqrt{5}}{2}}

                          newcommand{eopt}{%
                          left(1+grplusright)-fleft(1+grminusright)%
                          }

                          NewDocumentCommand{x}{O{1}}{a_{n-#1}}
                          NewDocumentCommand{e}{O{eopt}}{\&=dfrac{n #1}{sqrt{5}}}

                          NewDocumentCommand{g}{O{n-1}}{left(grminusright)^{#1}}
                          NewDocumentCommand{h}{O{n-1}}{left(grplusright)^{#1}}

                          newcommand{n}{g[n-2]}
                          newcommand{f}{h[n-2]}

                          begin{document}

                          $begin{aligned}[t]
                          a_n&=x+x[2]e[-f+hg]ee[h[2]]
                          end{aligned}$


                          I also used aligned in order to get a better alignment.



                          enter image description here



                          There's no reason for plaguing you code with useless ensuremath.







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered yesterday









                          egregegreg

                          727k8819223231




                          727k8819223231






















                              Seven is a new contributor. Be nice, and check out our Code of Conduct.










                              draft saved

                              draft discarded


















                              Seven is a new contributor. Be nice, and check out our Code of Conduct.













                              Seven is a new contributor. Be nice, and check out our Code of Conduct.












                              Seven is a new contributor. Be nice, and check out our Code of Conduct.
















                              Thanks for contributing an answer to TeX - LaTeX 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.


                              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%2ftex.stackexchange.com%2fquestions%2f479771%2fwhy-wont-this-compile-argument-of-h-has-an-extra%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

                              "Incorrect syntax near the keyword 'ON'. (on update cascade, on delete cascade,)

                              Alcedinidae

                              RAC Tourist Trophy