Add paired delimiters showcasing, add 'absolute' command to glossary

bib/glossaries/symbols/other.bib

@@ -13,7 +13,7 @@ @entry{derivative
 @entry{partial_derivative,
  name={\partialderivativefmt{\symbolplaceholder}},
  description={partial, infinitesimal change in \symbolplaceholder},
- unit={--},
+ unit={\symbolplaceholder},
 }
 @entry{difference,
  name={\differencefmt{\symbolplaceholder}},
@@ -45,3 +45,8 @@ @entry{vector
  description={Vector},
  unit={--},
 }
+@entry{abs,
+ name={\ensuremath{\abs*{\symbolplaceholder}}},
+ description={Absolute of \symbolplaceholder},
+ unit={\symbolplaceholder},
+}

chapters/mainmatter/base-features.tex

@@ -259,6 +259,8 @@ \subsubsection{Predefined Macros}
  \midrule
  Mean & \(\mean{\sym{density}}\), \(\mean{\sym{area}}\) \\
  Logarithmic Mean & \(\logmean{\sym{density}}\), \(\logmean{\sym{area}}\) \\
+ % The starred variant scales automatically:
+ Absolute\mpfootnotemark[1] & \(\abs*{\sym{density}}\), \(\abs*{\sym{area}}\), \(\abs*{\frac{\sym{area}^{2}}{\sym{area}^{3}}}\) \\
  Flow & \(\flow{\sym{mass}}\), \(\flow{\sym{enthalpy}}\) \\
  Delta & \(\difference{\sym{volume}}\), \(\difference{\symspec{enthalpy}}\) \\
  Nabla Operator &
@@ -286,23 +288,55 @@ \subsubsection{Predefined Macros}
  \fracderiv*{\symspec{enthalpy}}{\sym{abs_temperature}},
  \fracderiv*[2]{\symspec{enthalpy}}{\sym{abs_temperature}}
  \) \\
- Time Deriv.\mpfootnotemark[1] &
+ Time Deriv.\mpfootnotemark[2] &
  \(
  \timederiv{\sym{voltage}},
  \timederiv[2]{\sym{second_cart_coord}},
  \timederiv*{\sym{voltage}},
  \timederiv*[2]{\sym{first_cart_coord}}
  \) \\
- Positional Deriv.\mpfootnotemark[1] &
+ Positional Deriv.\mpfootnotemark[2] &
  \(
  \posderiv{\sym{volume}},
  \posderiv[2]{\sym{velocity}},
  \posderiv*{\sym{volume}},
  \posderiv*[2]{\sym{velocity}}
  \) \\
+ \addlinespace
+ % The starred variant scales automatically. The non-starred version
+ % does not scale.
+ % Supply the optional argument for manual control of the size, e.g.
+ % `\abs[\Bigg]{\frac{a}{b}}`, should this ever be needed.
+ Parentheses\mpfootnotemark[1] &
+ \(
+ \parens*{x},
+ \parens*{x_{2}},
+ \parens*{x^{2}},
+ \parens*{\frac{x}{y}},
+ \parens*{\frac{x^{2}}{y^{3}}}
+ \) \\
+ Brackets\mpfootnotemark[1] &
+ \(
+ \brackets*{x},
+ \brackets*{x_{2}},
+ \brackets*{x^{2}},
+ \brackets*{\frac{x}{y}},
+ \brackets*{\frac{x^{2}}{y^{3}}}
+ \) \\
+ Braces\mpfootnotemark[1] &
+ \(
+ \braces*{x},
+ \braces*{x_{2}},
+ \braces*{x^{2}},
+ \braces*{\frac{x}{y}},
+ \braces*{\frac{x^{2}}{y^{3}}}
+ \) \\
  \bottomrule
  \end{tabular}
  \footnotetext[1]{%
+ These scale automatically according to their content, using \ctanpackage{mathtools}.%
+ }%
+ \footnotetext[2]{%
  As a shortcut version of fractional derivatives.%
  }%
  }

cookbook.cls

@@ -105,6 +105,7 @@
  % also scales the delimiters automatically, using \left and \right.
  \DeclarePairedDelimiter{\parens}{(}{)}
  \DeclarePairedDelimiter{\brackets}{[}{]}
+ \DeclarePairedDelimiter{\braces}{\{}{\}}
  \DeclarePairedDelimiter{\abs}{\lvert}{\rvert}% Absolute value
 
 % For a 'cases' environment that also supports equation numbering,