answerjh.sty

% answerjh.sty 2001-May-23
\typeout{2001-May-23 Document Style `answerjh'.  Jim Hefferon}
\RequirePackage[single,nowrite]{bookans} %!!! no write !!! else ereases answers
\RequirePackage{bookjh,linalgjh}


% PAGE DIMENSIONS
% \usepackage{vmargin}
% \setmarginsrb{1in}{1in}{1in}{1in}%
%               {12pt}{4pt}{0pt}{0pt}
\geometry{margin=1in}


% HEADERS and FOOTERS
\RequirePackage{fancyhdr}

\pagestyle{fancyplain}
\lhead[\fancyplain{}{\thepage}]{\fancyplain{}{\textit{Answers to Exercises}}}
\chead[\fancyplain{}{}]{\fancyplain{}{}}
\rhead[\fancyplain{}{\textit{Linear Algebra, by Hef{}feron}}]{%
                                             \fancyplain{}{\thepage}}
\lfoot[\fancyplain{}{}]{\fancyplain{}{}}
\cfoot[\fancyplain{\thepage}{}]{\fancyplain{}{}}
\rfoot[\fancyplain{}{}]{\fancyplain{}{}}
%\setlength{\footrulewidth}{0pt}
\setlength{\headwidth}{\textwidth}
\addtolength{\footskip}{9pt}



%\renewcommand{\p@theorem}{\relax}
% jh; stuff I often use

% Changed to support new kind of enumeration environment jh 90-7-10
\def\labelenumi{(\arabic{enumi})}
\def\theenumi{\arabic{enumi}}
\def\labelenumii{\(\bullet\)}
\def\theenumii{\alph{enumii}}
\def\p@enumii{\theenumi}
\def\labelenumiii{(\roman{enumiii})}
\def\theenumiii{\roman{enumiii}}
\def\p@enumiii{\theenumi(\theenumii)}
\def\labelenumiv{\bf --}
\def\theenumiv{\Alph{enumiv}}
\def\p@enumiv{\p@enumiii\theenumiii}

\def\labelitemi{$\bullet$}
\def\labelitemii{\bf --}
\def\labelitemiii{$\ast$}
\def\labelitemiv{$\cdot$}


% ANSWERLIST
%  Answers are set inside this list.
\newcounter{answerlistcounter}
\newcommand{\answerlabel}[1]{{\bfseries #1}}
\newenvironment{answerlist}{%
    \begin{list}{\relax
                }{\usecounter{answerlistcounter}
                  \renewcommand{\makelabel}{\answerlabel}
                  \setlength{\leftmargin}{1em}
                  \setlength{\rightmargin}{0em}
                  \setlength{\parsep}{\parskip}
                  \setlength{\itemsep}{.7ex plus .5ex minus .3ex}
                  \setlength{\itemindent}{0em}
                  \setlength{\listparindent}{\parindent}
                  \setlength{\topsep}{.5ex plus .5ex minus .3ex}
                  \setlength{\partopsep}{0ex plus .5ex minus .1ex}
                  \setlength{\labelsep}{.8em}
                  \setlength{\labelwidth}{0em}
                  \setlength{\abovedisplayskip}{3pt plus2pt minus3pt}%
                  \setlength{\belowdisplayskip}{\abovedisplayskip}
                  \setlength{\abovedisplayshortskip}{0pt plus2pt}%
                  \setlength{\belowdisplayshortskip}{3pt plus2pt minus3pt}
                 }
  }{\end{list}%
   }
% An \item in the answerlist is made by \begin{ans}{One.II.3.4} .. \end{ans}
% They were put there by answer.sty on LaTeX-ing the book.
% \ifhrefout
%   \renewenvironment{ans}[1]{\item[\hyperref{book.pdf}{exercise}{#1}{#1}\hypertarget{ans.#1}{}]}{%
%   }
% \else
%   \renewenvironment{ans}[1]{\item[#1]}{%
%   }
% \fi
\renewenvironment{ans}[1]{%
  \begin{answerlist}%
    \ifinsidetopic
      \item[\hyperref{book.pdf}{exercise}{\thesubsection.#1}{#1}\hypertarget{ans.\thesubsection.#1}{}]
    \else
      \item[\hyperref{book.pdf}{exercise}{#1}{#1}\hypertarget{ans.#1}{}]
    \fi }{%
  \end{answerlist}
}



% \answerspacer 
% \answerdivider
%  Visual candy put into answer files to separate answers from different
% sections and chapters.
%\newcommand{\answerspacer}{\relax}
%\newcommand{\answerdivider}{\vspace{5ex plus 2ex minus 1ex}\hbox to \textwidth{\rule{0in}{.25in}
%                                  \leaders\hbox to 1em{\hss.\hss}\hfill}}



%=======================================
% Disclaimer that the answer is as in the published source for the question.
\newcommand{\answerasgiven}{%
  \textit{This is how the answer was given in the cited source. }}



%--------exparts and exparts*
% For exercises with sub-parts.  The *-ed version prints them across:
% (a) xxx  (b) yyy  (c) zzz ..
% while the un-*-ed version prints them down:
% (a) xxx
% (b) yyy 
% Use this way:
% \begin{exparts}
%  \partitem        % not just \item so works in *-ed version.
% \end{exparts}
% Remark: I don't think I can use, say, paralist.  I *don't* want:
%     (a) Yes.  (b) No; the reason is that we cannot
%     find any counterexample  (c) Yes. 
% and I lack the TeX skills to automate the job of selecting the
% *-ed or un-*-ed version depending.
%
\renewenvironment{exparts}{%
\def\partsitem{\item\relax}%
\begin{expartslist}%
}{%
\end{expartslist}}
%
\renewenvironment{exparts*}{%
\def\partsitem{\penalty-400\hskip1.25em\relax\hbox{%
\refstepcounter{expartscount}\textbf{(\alph{expartscount})}\hspace*{.5em}}\nobreak}
\begin{expartslist}
\setlength{\itemindent}{-1.25em}
\rightskip=0pt plus7em\spaceskip=.3333em\xspaceskip=.5em\relax%
\item[]}{%
\end{expartslist}}
%
\renewenvironment{expartslist}{%
\begin{list}{\textbf{(\alph{expartscount})}}{
  \usecounter{expartscount}
  \setlength{\leftmargin}{1em}
  \setlength{\rightmargin}{0em}
  \setlength{\listparindent}{\parindent}
  \setlength{\itemindent}{0em}
  \setlength{\labelsep}{.4em}
  \setlength{\labelwidth}{0em}
  \setlength{\topsep}{0ex}
  \setlength{\parskip}{0ex}
  \setlength{\partopsep}{0ex}
  \setlength{\parsep}{0ex}
  \setlength{\itemsep}{0ex}
  }%
}{%
\end{list}}
%
%...........end: exparts and exparts*



%\renewcommand{\thechapter}{\Englishnumber{\value{chapter}}}
\renewcommand{\thesection}{\thechapter.\Roman{section}}
\renewcommand{\chaptermark}[1]{% docs in fancyheadings.
  \markboth{\chaptername~\thechapter. #1}{}}
\renewcommand{\sectionmark}[1]{%
  \markright{Section~\Roman{section}. #1}}
%\renewcommand{\thesubsection}{\arabic{subsection}}
%end headings

%\renewcommand{\subsection}{\@startsection%
%    {subsection}{2}{0em}{10ex plus1ex minus1ex}{1em}%
%    {\raggedright\large\bfseries}}
%  Format the answer label.
  \renewcommand{\ansparams}{{\Currentlabel}}

% CROSS REFERENCES
% References in the answers that are hypered are not internal to the 
% answer file; they need to link to the book file.
\newcommand{\bookname}{book.pdf}
%\makeatletter
\ifhrefout
  \newcommand{\bookreference}[2]{% #1=ref type (`Definition', etc.), #2=ref
    \def\jhans@anchorname{% name like `theorem.1234'
     \expandafter\expandafter\expandafter\@fourthoffive\csname r@#2\endcsname}%
    \def\jhans@farref{\bookname\#\jhans@anchorname}% like `book.pdf#ans.1234'
    \def\jhans@reftext{%
     \expandafter\expandafter\expandafter\@firstoffive\csname r@#2\endcsname}%
   #1~\expandafter\href\expandafter{\jhans@farref}{\jhans@reftext}%
  }
  \renewcommand{\nearbydefinition}[1]{\bookreference{Definition}{#1}}
  \renewcommand{\nearbyfigure}[1]{\bookreference{Figure}{#1}}
  \renewcommand{\nearbylemma}[1]{\bookreference{Lemma}{#1}}
  \renewcommand{\nearbyexample}[1]{\bookreference{Example}{#1}}
  \renewcommand{\nearbycounterexample}[1]{\bookreference{Counterexample}{#1}}
  \renewcommand{\nearbytheorem}[1]{\bookreference{Theorem}{#1}}
  \renewcommand{\nearbycorollary}[1]{\bookreference{Corollary}{#1}}
  \renewcommand{\nearbyexercise}[1]{\bookreference{Exercise}{#1}}
  \renewcommand{\nearbyremark}[1]{\bookreference{Remark}{#1}}
  \renewcommand{\nearbynotice}[1]{\bookreference{Notice}{#1}}
  \renewcommand{\nearbynote}[1]{\bookreference{Note}{#1}}  
\fi




% PAGE LAYOUT
%
% CHAPTER and SUBSECTION commands
% \renewcommand{\chapter}{\secdef\chapcmda\chapcmdb}

% \newcommand{\chapcmda}[2][]{%  
%   \addcontentsline{toc}{chapter}{#1}%
%   \chapheader{#1}}
% \newcommand{\chapcmdb}[1]{\chapheader{#1}}

% \newcommand{\chapheader}[1]{% \end{answerlist}
% \clearemptydoublepage\thispagestyle{empty} %
% \vspace*{4ex}
% {\centering{\LARGE\bfseries #1}}%
% \vspace{-2ex plus1ex}%
% % \begin{answerlist}\item[]
% }

% \renewcommand{\section}{\@startsection%
%     {section}{1}{0em}{-10ex plus1ex minus2ex}{4ex}%
%     {\usefont{T1}{fvs}{b}{n}\Large}}
\renewcommand{\section}{\vspace{0ex plus 14ex minus 14ex}\@startsection%
    {section}{1}{0em}{-20ex plus10ex minus2ex}{4ex}%
    {\usefont{T1}{fvs}{b}{n}\Large}}

\renewcommand{\topicsection}{\vspace{0ex plus 14ex minus 14ex}\@startsection%
     {section}{1}{0em}{-10ex plus1ex minus2ex}{4ex}%
     {\usefont{T1}{fvs}{b}{n}\Large \makebox[2.9em][r]{Topic: }}}

\renewcommand{\topic}[1]{\topicsection*{#1}
   \stepcounter{section} % increment the section so exercises can have unique hyper reference 
   \renewcommand{\announcesectioninginanswerfile}{%
      \sectioninginanswerfiletopicstyle}
  \insidetopictrue % Handle hyperref-ing of exercise in topic way 
  % renew definition of exercise formatting (perhaps undone in Chapter)
  \setcounter{theorem}{0}  % hack to make exercise numbering correct
  \renewcommand{\exercise@makelabel}{} % 
  % JH testing 2012-Oct-05 \renewcommand{\exercise@deflabel}[1]{\textbf{\arabic{##1}}}
  \renewcommand{\exercise@deflabel}[1]{\hyperdef{exercise}{\Englishnumber{\value{chapter}}.\Roman{section}.\arabic{subsection}.\Currentlabel}{}\hyperref{./jhanswer.pdf}{ans}{\Englishnumber{\value{chapter}}.\Roman{section}.\arabic{subsection}.\Currentlabel}{\textbf{\Currentlabel}}%
  % \typeout{!!! in Topic next exercise defed \Englishnumber{\value{chapter}}.\Roman{section}.\arabic{subsection}.\Currentlabel !!!!}
  }
  \renewcommand{\ansparams}{{\Currentlabel}}
  \thispagestyle{empty}
  \gdef\sectioningname{#1}%
  \markright{Topic: #1}
  \addcontentsline{toc}{section}{Topic: #1}
  % \vspace*{15pt}\noindent\fancyfont{Topic}\par
  % \vspace*{10pt}\noindent{\Large\bfseries #1}\vspace{20pt}
  % \par\@afterindentfalse\nobreak 
  % \typeout{+++++++++ value of the chapter section subsection is \thechapter.\thesection +++++++}
}

% 
% \renewcommand{\subsection}{\secdef\anssubseccmda\anssubseccmdb}

% \newcommand{\anssubseccmda}[2][?]{%
%   %\end{answerlist}
%   \addcontentsline{toc}{subsection}{#1}%
%   \anssubsecheader{#2}}

% \newcommand{\anssubseccmdb}[1]{\anssubsecheader{#1}}

% \newcommand{\anssubsecheader}[1]{% \end{answerlist}%
% \vspace{4ex plus1ex minus.5ex}\pagebreak[3]\vspace*{1ex plus1ex minus.25ex}%
% {\flushleft\large\bfseries #1}%
% \nopagebreak\vspace{1ex plus .5ex minus.5ex} % \nopagebreak\begin{answerlist}\item[]}
% \renewcommand{\section}{\secdef\seca\secb}
% \newcommand{\seca}[1]{\clearpage {\raggedright\Large\bfseries #1}}
% \newcommand{\secb}[1]{\clearpage {\raggedright\Large\bfseries #1}}

\renewcommand{\@seccntformat}[1]{\relax}

%end PAGE LAYOUT

% Table of Contents
\usepackage{tocloft}

\renewcommand{\numberline}[1]{\relax}

% Resolve References
\input{book.aux}
\endinput