wtk_cmmds.sty

   1 % Assorted macros useful to W. Trevor King (mostly for physics)
   2 %
   3 % Released to the public domain.
   4
   5 \RequirePackage{relsize} % for \smaller
   6 \RequirePackage{amsmath} % for \text{}
   7
   8 % Author, Copyright junk
   9 \newcommand{\copytitle}{
  10   \begin{center}
  11     Copyright \copyright\ \today\ by W.\ Trevor King\\
  12     \smaller{This document is distributed under the GNU Free Documentation License.}
  13   \end{center}
  14 }
  15
  16 % define theorem environments
  17 \newtheorem{thm}{Theorem}
  18 \newtheorem{cor}[thm]{Corollary}
  19 \newtheorem{lem}{Lemma}
  20
  21 \newcommand{\U}[1]{\text{ #1}}                  % units shortcut
  22 \newcommand{\E}[1]{\ensuremath{\cdot 10 ^{#1}}} % exponent shortcut
  23 \newcommand{\dg}{\ensuremath{^{\circ}}}         % degree symbol ^o
  24 \newcommand{\vect}[1]{\ensuremath{\mathbf{#1}}} % make vectors bold
  25
  26 \newcommand{\Ohm}{\ensuremath{\Omega}} % units of resistance
  27 \newcommand{\EMF}{\ensuremath{\mathcal{E}}} % electro-motive force
  28
  29 \newcommand{\ihat}{\vect{\hat{i}}}
  30 \newcommand{\jhat}{\vect{\hat{j}}}
  31 \newcommand{\khat}{\vect{\hat{k}}}
  32 \newcommand{\rhat}{\vect{\hat{r}}}
  33
  34 \newcommand{\avg}[1]{\ensuremath{\left\langle {#1} \right\rangle}} % average
  35 \newcommand{\dt}[1]{\ensuremath{\dot{#1}}} % first deriv with respect to time
  36 \newcommand{\ddt}[1]{\ensuremath{\ddot{#1}}} % 2nd deriv with respect to time
  37 % the proper d to be used in derivatives and integrals
  38 \newcommand{\dd}{\ensuremath{\mathrm d}}
  39 % derivative of #2 with respect to #1
  40 \newcommand{\deriv}[2]{\ensuremath{\frac{\dd{#2}}{\dd{#1}}}}
  41 % #1th order derivative of #3 with respect to #2
  42 \newcommand{\nderiv}[3]{\ensuremath{\frac{\dd^{#1}{#3}}{\dd{#2}^{#1}}}}
  43 % partial derivative of #2 with respect to #1
  44 \newcommand{\pderiv}[2]{\ensuremath{\frac{\partial#2}{\partial#1}}}
  45 % #1th order partial derivative of #3 with respect to #2
  46 \newcommand{\npderiv}[3]{\ensuremath{\frac{\partial^{#1}{#3}}{\partial{#2}^{#1}}}}
  47
  48 % parenthesis, for example (some stuff] would be \p({some stuff}]
  49 \newcommand{\p}[3]{\left#1 #2 \right#3}
  50
  51 % parts for multi-part problems and solutions (use problempack.sty instead)
  52 %\newcommand{\Part}[1]{\textcolor{Red}{(#1)}}
  53 % highlight answers in solutions
  54 %\newcommand{\ans}[1]{\textcolor{Red}{#1}}
  55
  56 % struts for table spacing
  57 \newcommand{\Tstrut}{\rule{0pt}{2.6ex}}
  58 \newcommand{\Bstrut}{\rule[-1.2ex]{0pt}{0pt}}
  59
  60 % \numberwithin{equation}{section}% number equations by section
  61 % \setcounter{secnumdepth}{0}     % turn off section numbering below this level
  62
  63
  64 % tighter lists, a la alvin alexander
  65 % http://www.devdaily.com/blog/post/latex/control-line-spacing-in-itemize-enumerate-tags/
  66
  67 \newenvironment{packed_enum}{
  68 \begin{enumerate}
  69   \setlength{\itemsep}{1pt}
  70   \setlength{\parskip}{0pt}
  71   \setlength{\parsep}{0pt}
  72 }{\end{enumerate}}
  73
  74 \newenvironment{packed_item}{
  75 \begin{itemize}
  76   \setlength{\itemsep}{1pt}
  77   \setlength{\parskip}{0pt}
  78   \setlength{\parsep}{0pt}
  79 }{\end{itemize}}