titlesec makes fancyhdr mistreating the document class












0















MWE is pretty simple:



documentclass[twoside]{article}
%usepackage{titlesec}
usepackage{fancyhdr}
begin{document}
pagestyle{fancy}
section{tist1}
subsection{a}
newpage
subsection{b}
end{document}


On the second page, there is the subsection name on the left and the section name on the right.



Now, uncomment the titlesec import, and the behaviour changes: the section name on the left and nothing (actually, a fantom of non-existent chapter name) on the right.



It happens because titlesec redefines chapter as relax, though normally it's undefined in article class. The fancyhdr packages has a following check:



ifxchapter@undefined


It fails, and marks are defined as in classes that have chapters. I can work it around with



letchapterundefined


after usepackage{titlesec}, or by explicitly redefining sectionmark/subsectionmark after pagestyle{fancy}. But why should I? Is this a bug in titlesec, or setting chapter to relax has some purpose?










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    0















    MWE is pretty simple:



    documentclass[twoside]{article}
    %usepackage{titlesec}
    usepackage{fancyhdr}
    begin{document}
    pagestyle{fancy}
    section{tist1}
    subsection{a}
    newpage
    subsection{b}
    end{document}


    On the second page, there is the subsection name on the left and the section name on the right.



    Now, uncomment the titlesec import, and the behaviour changes: the section name on the left and nothing (actually, a fantom of non-existent chapter name) on the right.



    It happens because titlesec redefines chapter as relax, though normally it's undefined in article class. The fancyhdr packages has a following check:



    ifxchapter@undefined


    It fails, and marks are defined as in classes that have chapters. I can work it around with



    letchapterundefined


    after usepackage{titlesec}, or by explicitly redefining sectionmark/subsectionmark after pagestyle{fancy}. But why should I? Is this a bug in titlesec, or setting chapter to relax has some purpose?










    share|improve this question

























      0












      0








      0








      MWE is pretty simple:



      documentclass[twoside]{article}
      %usepackage{titlesec}
      usepackage{fancyhdr}
      begin{document}
      pagestyle{fancy}
      section{tist1}
      subsection{a}
      newpage
      subsection{b}
      end{document}


      On the second page, there is the subsection name on the left and the section name on the right.



      Now, uncomment the titlesec import, and the behaviour changes: the section name on the left and nothing (actually, a fantom of non-existent chapter name) on the right.



      It happens because titlesec redefines chapter as relax, though normally it's undefined in article class. The fancyhdr packages has a following check:



      ifxchapter@undefined


      It fails, and marks are defined as in classes that have chapters. I can work it around with



      letchapterundefined


      after usepackage{titlesec}, or by explicitly redefining sectionmark/subsectionmark after pagestyle{fancy}. But why should I? Is this a bug in titlesec, or setting chapter to relax has some purpose?










      share|improve this question














      MWE is pretty simple:



      documentclass[twoside]{article}
      %usepackage{titlesec}
      usepackage{fancyhdr}
      begin{document}
      pagestyle{fancy}
      section{tist1}
      subsection{a}
      newpage
      subsection{b}
      end{document}


      On the second page, there is the subsection name on the left and the section name on the right.



      Now, uncomment the titlesec import, and the behaviour changes: the section name on the left and nothing (actually, a fantom of non-existent chapter name) on the right.



      It happens because titlesec redefines chapter as relax, though normally it's undefined in article class. The fancyhdr packages has a following check:



      ifxchapter@undefined


      It fails, and marks are defined as in classes that have chapters. I can work it around with



      letchapterundefined


      after usepackage{titlesec}, or by explicitly redefining sectionmark/subsectionmark after pagestyle{fancy}. But why should I? Is this a bug in titlesec, or setting chapter to relax has some purpose?







      fancyhdr titlesec article






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      asked 1 hour ago









      bodqhrohrobodqhrohro

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