2
\documentclass[12pt,a4paper]{book}

\usepackage[utf8]{inputenc}

\usepackage{amsmath}
\usepackage{mathtools}

\let\cleardoublepage=\clearpage

\begin{document}

    \noindent\fbox{%
    \parbox{\textwidth}{%
        {PGDM2018: Microeconomics}       \hspace{30mm}{November 2018-January 2019}
        \begin{center}
            Lecture 15: 7 Dec 2018
        \end{center}
        \\{Lecturer: Dr.Rakesh Nigam}
        \hspace{20mm}{Scribes: Vaibbhav Devender Kalra}
    }%
}

\end{document}
Werner
  • 603,163
Vaibbhav
  • 31
  • Overfull \hbox (6.79999pt too wide) in paragraph is a warning, not an error. As for your MWE, I see an error because you are using \\ immediately following \end{center}. You can remove this error by removing \\ – whatisit Dec 18 '18 at 02:58

1 Answers1

3

The \parbox is too wide, even at \textwidth, since the surrounding \fbox pads its contents on all sides by \fboxsep and \fboxrule. Remove this to avoid the overfull \hbox warnings:

enter image description here

\documentclass{article}

\begin{document}

\noindent\fbox{%
  \parbox{\dimexpr\linewidth-2\fboxsep-2\fboxrule}{%
    PGDM2018: Microeconomics
    \hfill November 2018-January 2019
    \begin{center}
      Lecture 15: 7 Dec 2018
    \end{center}
    Lecturer: Dr.Rakesh Nigam
    \hfill Scribes: Vaibbhav Devender Kalra
  }%
}

\end{document}
Werner
  • 603,163