[rand.eng.philox] Change $f$ to $f_n$, since it depends on $n$.

Author: tkoeppe

source/numerics.tex

@@ -3122,19 +3122,18 @@
 ($X$ in case of the first round)
 is permuted to obtain the intermediate state $V$:
 \begin{codeblock}
-@$V_j = X'_{f(j)}$@
+@$V_j = X'_{f_n(j)}$@
 \end{codeblock}
 where $j = 0, \dotsc, n - 1$ and
-$f(j)$ is defined in \tref{rand.eng.philox.f}.
+$f_n(j)$ is defined in \tref{rand.eng.philox.f}.
 
-\begin{floattable}{Values for the word permutation $f(j)$}{rand.eng.philox.f}
+\begin{floattable}{Values for the word permutation $\bm{f}_{\bm{n}}\bm{(j)}$}{rand.eng.philox.f}
 {l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l}
 \topline
-  \multicolumn{2}{|c|}{}
-    & \multicolumn{16}{c|}{$j=$} \\ \cline{3-18}
+  \multicolumn{2}{|c|}{$\bm{f}_{\bm{n}}\bm{(j)}$} & \multicolumn{16}{c|}{$\bm{j}$} \\ \cline{3-18}
   \multicolumn{2}{|c|}{}
     & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & 13 & 14 & 15 \\ \hline
-  $n=$ & 2 & 0 & 1 & \multicolumn{14}{c|}{} \\ \cline{2-18}
+  $\bm{n} $ & 2 & 0 & 1 & \multicolumn{14}{c|}{} \\ \cline{2-18}
   & 4 & 0 & 3 & 2 & 1 & \multicolumn{12}{c|}{} \\ \cline{2-18}
   & 8 & 2 & 1 & 4 & 7 & 6 & 5 & 0 & 3 & \multicolumn{8}{c|}{} \\ \cline{2-18}
   & 16 & 0 & 9 & 2 & 13 & 6 & 11 & 4 & 15 & 10 & 7 & 12 & 3 & 14 & 5 & 8 & 1 \\ \cline{2-18}

source/std.tex

@@ -24,6 +24,7 @@
 \usepackage{color}        % define colors for strikeouts and underlines
 \usepackage{amsmath}      % additional math symbols
 \usepackage{mathrsfs}     % mathscr font
+\usepackage{bm}
 \usepackage[final]{microtype}
 \usepackage[splitindex,original]{imakeidx}
 \usepackage{multicol}