% use the "wcp" class option for workshop and conference % proceedings %\documentclass[gray]{jmlr} % test grayscale version %\documentclass[tablecaption=bottom]{jmlr}% journal article \documentclass[tablecaption=bottom,wcp]{jmlr} % W&CP article % The following packages will be automatically loaded: % amsmath, amssymb, natbib, graphicx, url, algorithm2e %\usepackage{rotating}% for sideways figures and tables %\usepackage{longtable}% for long tables % The booktabs package is used by this sample document % (it provides \toprule, \midrule and \bottomrule). % Remove the next line if you don't require it. \usepackage{booktabs} % The siunitx package is used by this sample document % to align numbers in a column by their decimal point. % Remove the next line if you don't require it. \usepackage[load-configurations=version-1]{siunitx} % newer version %\usepackage{siunitx} % The following command is just for this sample document: \newcommand{\cs}[1]{\texttt{\char`\\#1}}% remove this in your real article % Define an unnumbered theorem just for this sample document for % illustrative purposes: \theorembodyfont{\upshape} \theoremheaderfont{\scshape} \theorempostheader{:} \theoremsep{\newline} \newtheorem*{note}{Note} % change the arguments, as appropriate, in the following: \jmlrvolume{1} \jmlryear{2010} \jmlrsubmitted{submission date} \jmlrpublished{publication date} \jmlrworkshop{workshop title} % W&CP title % The optional argument of \title is used in the header \title[Short Title]{Full Title of Article\titlebreak This Title Has A Line Break} % Anything in the title that should appear in the main title but % not in the article's header or the volume's table of % contents should be placed inside \titletag{} %\title{Title of the Article\titletag{\thanks{Some footnote}}} % Use \Name{Author Name} to specify the name. % If the surname contains spaces, enclose the surname % in braces, e.g. \Name{John {Smith Jones}} similarly % if the name has a "von" part, e.g \Name{Jane {de Winter}}. % If the first letter in the forenames is a diacritic % enclose the diacritic in braces, e.g. \Name{{\'E}louise Smith} % \thanks must come after \Name{...} not inside the argument for % example \Name{John Smith}\nametag{\thanks{A note}} NOT \Name{John % Smith\thanks{A note}} % Anything in the name that should appear in the title but not in the % article's header or footer or in the volume's % table of contents should be placed inside \nametag{} % Two authors with the same address \author{\Name{Author Name1\nametag{\thanks{A note}}} \Email{abc@sample.com}\and \Name{Author Name2} \Email{xyz@sample.com}\\ \addr Address} % Three or more authors with the same address: % \author{\Name{Author Name1} \Email{an1@sample.com}\\ % \Name{Author Name2} \Email{an2@sample.com}\\ % \Name{Author Name3} \Email{an3@sample.com}\\ % \Name{Author Name4} \Email{an4@sample.com}\\ % \Name{Author Name5} \Email{an5@sample.com}\\ % \Name{Author Name6} \Email{an6@sample.com}\\ % \Name{Author Name7} \Email{an7@sample.com}\\ % \Name{Author Name8} \Email{an8@sample.com}\\ % \Name{Author Name9} \Email{an9@sample.com}\\ % \Name{Author Name10} \Email{an10@sample.com}\\ % \Name{Author Name11} \Email{an11@sample.com}\\ % \Name{Author Name12} \Email{an12@sample.com}\\ % \Name{Author Name13} \Email{an13@sample.com}\\ % \Name{Author Name14} \Email{an14@sample.com}\\ % \addr Address} % Authors with different addresses: % \author{\Name{Author Name1} \Email{abc@sample.com}\\ % \addr Address 1 % \AND % \Name{Author Name2} \Email{xyz@sample.com}\\ % \addr Address 2 %} \editor{Editor's name} %\editors{Editor One and Editor Two}% for multiple editors \begin{document} \maketitle \begin{abstract} This is the abstract for this article. \end{abstract} \begin{keywords} List of keywords \end{keywords} \section{Introduction} \label{sec:intro} This is a sample article that uses the \textsf{jmlr} class with the \texttt{wcp} class option. Please follow the guidelines in this sample document as it can help to reduce complications when combining the articles into a book. Please avoid using obsolete commands, such as \verb|\rm|, and obsolete packages, such as \textsf{epsfig}.\footnote{See \url{http://www.ctan.org/pkg/l2tabu}} Some packages that are known to cause problems for the production editing process are checked for by the \textsf{jmlr} class and will generate an error. (If you want to know more about the production editing process, have a look at the video tutorials for the production editors at \url{http://www.dickimaw-books.com/software/makejmlrbookgui/videos/}.) Please also ensure that your document will compile with PDF\LaTeX. If you have an error message that's puzzling you, first check for it at the UK TUG FAQ \url{https://texfaq.org/FAQ-man-latex}. If that doesn't help, create a minimal working example (see \url{https://www.dickimaw-books.com/latex/minexample/}) and post to somewhere like \TeX\ on StackExchange (\url{http://tex.stackexchange.com/}) or the \LaTeX\ Community Forum (\url{http://www.latex-community.org/forum/}). \begin{note} This is an numbered theorem-like environment that was defined in this document's preamble. \end{note} \subsection{Sub-sections} Sub-sections are produced using \verb|\subsection|. \subsubsection{Sub-sub-sections} Sub-sub-sections are produced using \verb|\subsubsection|. \paragraph{Sub-sub-sub-sections} Sub-sub-sub-sections are produced using \verb|\paragraph|. These are unnumbered with a running head. \subparagraph{Sub-sub-sub-sub-sections} Sub-sub-sub-sub-sections are produced using \verb|\subparagraph|. These are unnumbered with a running head. \section{Cross-Referencing} Always use \verb|\label| and \verb|\ref| (or one of the commands described below) when cross-referencing. For example, the next section is Section~\ref{sec:math} but you can also refer to it using \sectionref{sec:math}. The \textsf{jmlr} class provides some convenient cross-referencing commands: \verb|\sectionref|, \verb|\equationref|, \verb|\tableref|, \verb|\figureref|, \verb|\algorithmref|, \verb|\theoremref|, \verb|\lemmaref|, \verb|\remarkref|, \verb|\corollaryref|, \verb|\definitionref|, \verb|\conjectureref|, \verb|\axiomref|, \verb|\exampleref| and \verb|\appendixref|. The argument of these commands may either be a single label or a comma-separated list of labels. Examples: Referencing sections: \sectionref{sec:math} or \sectionref{sec:intro,sec:math} or \sectionref{sec:intro,sec:math,sec:tables,sec:figures}. Referencing equations: \equationref{eq:trigrule} or \equationref{eq:trigrule,eq:df} or \equationref{eq:trigrule,eq:f,eq:df,eq:y}. Referencing tables: \tableref{tab:operatornames} or \tableref{tab:operatornames,tab:example} or \tableref{tab:operatornames,tab:example,tab:example-booktabs}. Referencing figures: \figureref{fig:nodes} or \figureref{fig:nodes,fig:teximage} or \figureref{fig:nodes,fig:teximage,fig:subfigex} or \figureref{fig:circle,fig:square}. Referencing algorithms: \algorithmref{alg:gauss} or \algorithmref{alg:gauss,alg:moore} or \algorithmref{alg:gauss,alg:moore,alg:net}. Referencing theorem-like environments: \theoremref{thm:eigenpow}, \lemmaref{lem:sample}, \remarkref{rem:sample}, \corollaryref{cor:sample}, \definitionref{def:sample}, \conjectureref{con:sample}, \axiomref{ax:sample} and \exampleref{ex:sample}. Referencing appendices: \appendixref{apd:first} or \appendixref{apd:first,apd:second}. \section{Equations} \label{sec:math} The \textsf{jmlr} class loads the \textsf{amsmath} package, so you can use any of the commands and environments defined there. (See the \textsf{amsmath} documentation for further details.\footnote{Either \texttt{texdoc amsmath} or \url{http://www.ctan.org/pkg/amsmath}}) Unnumbered single-lined equations should be displayed using \verb|\[| and \verb|\]|. For example: \[E = m c^2\] or you can use the \texttt{displaymath} environment: \begin{displaymath} E = m c^2 \end{displaymath} Numbered single-line equations should be displayed using the \texttt{equation} environment. For example: \begin{equation}\label{eq:trigrule} \cos^2\theta + \sin^2\theta \equiv 1 \end{equation} This can be referenced using \verb|\label| and \verb|\equationref|. For example, \equationref{eq:trigrule}. Multi-lined numbered equations should be displayed using the \texttt{align} environment.\footnote{For reasons why you shouldn't use the obsolete \texttt{eqnarray} environment, see Lars Madsen, \emph{Avoid eqnarray!} TUGboat 33(1):21--25, 2012.} For example: \begin{align} f(x) &= x^2 + x\label{eq:f}\\ f'(x) &= 2x + 1\label{eq:df} \end{align} Unnumbered multi-lined equations can be displayed using the \texttt{align*} environment. For example: \begin{align*} f(x) &= (x+1)(x-1)\\ &= x^2 - 1 \end{align*} If you want to mix numbered with unnumbered lines use the \texttt{align} environment and suppress unwanted line numbers with \verb|\nonumber|. For example: \begin{align} y &= x^2 + 3x - 2x + 1\nonumber\\ &= x^2 + x + 1\label{eq:y} \end{align} An equation that is too long to fit on a single line can be displayed using the \texttt{split} environment. Text can be embedded in an equation using \verb|\text| or \verb|\intertext| (as used in \theoremref{thm:eigenpow}). See the \textsf{amsmath} documentation for further details. \subsection{Operator Names} \label{sec:op} Predefined operator names are listed in \tableref{tab:operatornames}. For additional operators, either use \verb|\operatorname|, for example $\operatorname{var}(X)$ or declare it with \verb|\DeclareMathOperator|, for example \begin{verbatim} \DeclareMathOperator{\var}{var} \end{verbatim} and then use this new command. If you want limits that go above and below the operator (like \verb|\sum|) use the starred versions (\verb|\operatorname*| or \verb|\DeclareMathOperator*|). \begin{table*}[htbp] \floatconts {tab:operatornames}% {\caption{Predefined Operator Names (taken from \textsf{amsmath} documentation)}}% {% \begin{tabular}{rlrlrlrl} \cs{arccos} & $\arccos$ & \cs{deg} & $\deg$ & \cs{lg} & $\lg$ & \cs{projlim} & $\projlim$ \\ \cs{arcsin} & $\arcsin$ & \cs{det} & $\det$ & \cs{lim} & $\lim$ & \cs{sec} & $\sec$ \\ \cs{arctan} & $\arctan$ & \cs{dim} & $\dim$ & \cs{liminf} & $\liminf$ & \cs{sin} & $\sin$ \\ \cs{arg} & $\arg$ & \cs{exp} & $\exp$ & \cs{limsup} & $\limsup$ & \cs{sinh} & $\sinh$ \\ \cs{cos} & $\cos$ & \cs{gcd} & $\gcd$ & \cs{ln} & $\ln$ & \cs{sup} & $\sup$ \\ \cs{cosh} & $\cosh$ & \cs{hom} & $\hom$ & \cs{log} & $\log$ & \cs{tan} & $\tan$ \\ \cs{cot} & $\cot$ & \cs{inf} & $\inf$ & \cs{max} & $\max$ & \cs{tanh} & $\tanh$ \\ \cs{coth} & $\coth$ & \cs{injlim} & $\injlim$ & \cs{min} & $\min$ \\ \cs{csc} & $\csc$ & \cs{ker} & $\ker$ & \cs{Pr} & $\Pr$ \end{tabular}\par \begin{tabular}{rlrl} \cs{varlimsup} & $\varlimsup$ & \cs{varinjlim} & $\varinjlim$\\ \cs{varliminf} & $\varliminf$ & \cs{varprojlim} & $\varprojlim$ \end{tabular} } \end{table*} \section{Vectors and Sets} \label{sec:vec} Vectors should be typeset using \cs{vec}. For example $\vec{x}$. (The original version of \cs{vec} can also be accessed using \cs{orgvec}, for example $\orgvec{x}$.) The \textsf{jmlr} class also provides \cs{set} to typeset a set. For example $\set{S}$. \section{Floats} \label{sec:floats} Floats, such as figures, tables and algorithms, are moving objects and are supposed to float to the nearest convenient location. Please don't force them to go in a particular place. In general it's best to use the \texttt{htbp} specifier and don't put the figure or table in the middle of a paragraph (that is make sure there's a paragraph break above and below the float). Floats are supposed to have a little extra space above and below them to make them stand out from the rest of the text. This extra spacing is put in automatically and shouldn't need modifying. If your article will later be reprinted in the Challenges for Machine Learning, please be aware that the CiML books use a different paper size, so if you want to resize any images use a scale relative to the line width (\verb|\linewidth|), text width (\verb|\textwidth|) or text height (\verb|\textheight|). To ensure consistency, please \emph{don't} try changing the format of the caption by doing something like: \begin{verbatim} \caption{\textit{A Sample Caption.}} \end{verbatim} or \begin{verbatim} \caption{\em A Sample Caption.} \end{verbatim} You can, of course, change the font for individual words or phrases, for example: \begin{verbatim} \caption{A Sample Caption With Some \emph{Emphasized Words}.} \end{verbatim} \subsection{Tables} \label{sec:tables} Tables should go in the \texttt{table} environment. Within this environment use \verb|\floatconts| (defined by \textsf{jmlr}) to set the caption correctly and center the table contents. The location of the caption depends on the \verb|tablecaption| setting in the document class options. \begin{table}[htbp] % The first argument is the label. % The caption goes in the second argument, and the table contents % go in the third argument. \floatconts {tab:example}% {\caption{An Example Table}}% {\begin{tabular}{ll} \bfseries Dataset & \bfseries Result\\ Data1 & 0.12345\\ Data2 & 0.67890\\ Data3 & 0.54321\\ Data4 & 0.09876 \end{tabular}} \end{table} If you want horizontal rules you can use the \textsf{booktabs} package which provides the commands \verb|\toprule|, \verb|\midrule| and \verb|\bottomrule|. For example, see \tableref{tab:example-booktabs}. \begin{table}[hbtp] \floatconts {tab:example-booktabs} {\caption{A Table With Horizontal Lines}} {\begin{tabular}{ll} \toprule \bfseries Dataset & \bfseries Result\\ \midrule Data1 & 0.12345\\ Data2 & 0.67890\\ Data3 & 0.54321\\ Data4 & 0.09876\\ \bottomrule \end{tabular}} \end{table} If you really want vertical lines as well, you can't use the \textsf{booktabs} commands as there'll be some unwanted gaps. Instead you can use \LaTeX's \verb|\hline|, but the rows may appear a bit cramped. You can add extra space above or below a row using \verb|\abovestrut| and \verb|\belowstrut|. For example, see \tableref{tab:example-hline}. However, you might want to read the \textsf{booktabs} documentation regarding the use of vertical lines. \begin{table}[htbp] \floatconts {tab:example-hline} {\caption{A Table With Horizontal and Vertical Lines}}% {% \begin{tabular}{|l|l|} \hline \abovestrut{2.2ex}\bfseries Dataset & \bfseries Result\\\hline \abovestrut{2.2ex}Data1 & 0.12345\\ Data2 & 0.67890\\ Data3 & 0.54321\\ \belowstrut{0.2ex}Data4 & 0.09876\\\hline \end{tabular} } \end{table} If you want to align numbers on their decimal point, you can use the \textsf{siunitx} package. For example, see \tableref{tab:example-siunitx}. For further details see the \textsf{siunitx} documentation\footnote{Either \texttt{texdoc siunitx} or \url{http://www.ctan.org/pkg/siunitx}}. \begin{table}[htbp] \floatconts {tab:example-siunitx} {\caption{A Table With Numbers Aligned on the Decimal Point}} {\begin{tabular}{lS[tabformat=3.5]} \bfseries Dataset & {\bfseries Result}\\ Data1 & 0.12345\\ Data2 & 10.6789\\ Data3 & 50.543\\ Data4 & 200.09876 \end{tabular}} \end{table} If the table is too wide, you can adjust the inter-column spacing by changing the value of \verb|\tabcolsep|. For example: \begin{verbatim} \setlength{\tabcolsep}{3pt} \end{verbatim} If the table is very wide but not very long, you can use the \texttt{sidewaystable} environment defined in the \textsf{rotating} package (so use \verb|\usepackage{rotating}|). If the table is too long to fit on a page, you can use the \texttt{longtable} environment defined in the \textsf{longtable} package (so use \verb|\usepackage{longtable}|). \subsection{Figures} \label{sec:figures} Figures should go in the \texttt{figure} environment. Within this environment, use \verb|\floatconts| to correctly position the caption and center the image. Use \verb|\includegraphics| for external graphics files but omit the file extension. Do not use \verb|\epsfig| or \verb|\psfig|. If you want to scale the image, it's better to use a fraction of the line width rather than an explicit length. For example, see \figureref{fig:nodes}. \begin{figure}[htbp] % Caption and label go in the first argument and the figure contents % go in the second argument \floatconts {fig:nodes} {\caption{Example Image}} {\includegraphics[width=0.5\linewidth]{images/nodes}} \end{figure} If your image is made up of \LaTeX\ code (for example, commands provided by the \textsf{pgf} package) you can include it using \cs{includeteximage} (defined by the \textsf{jmlr} class). This can be scaled and rotated in the same way as \cs{includegraphics}. For example, see \figureref{fig:teximage}. \begin{figure}[htbp] \floatconts {fig:teximage} {\caption{Image Created Using \LaTeX\ Code}} {\includeteximage[angle=45]{images/teximage}} \end{figure} If the figure is too wide to fit on the page, you can use the \texttt{sidewaysfigure} environment defined in the \textsf{rotating} package. Don't use \verb|\graphicspath|.\footnote{This is specific to the \textsf{jmlr} class, not a general recommendation. The main file that generates the proceedings or the CiML book is typically in a different directory to the imported articles, so it modifies the graphics path when it imports an article.} If the images are contained in a subdirectory, specify this when you include the image, for example \verb|\includegraphics{figures/mypic}|. \subsubsection{Sub-Figures} \label{sec:subfigures} Sub-figures can be created using \verb|\subfigure|, which is defined by the \textsf{jmlr} class. The optional argument allows you to provide a subcaption. The label should be placed in the mandatory argument of \verb|\subfigure|. You can reference the entire figure, for example \figureref{fig:subfigex}, or you can reference part of the figure using \verb|\figureref|, for example \figureref{fig:circle}. Alternatively you can reference the subfigure using \verb|\subfigref|, for example \subfigref{fig:circle,fig:square} in \figureref{fig:subfigex}. \begin{figure}[htbp] \floatconts {fig:subfigex} {\caption{An Example With Sub-Figures.}} {% \subfigure[A Circle]{\label{fig:circle}% \includegraphics[width=0.2\linewidth]{images/circle}}% \qquad \subfigure[A Square]{\label{fig:square}% \includegraphics[width=0.2\linewidth]{images/square}} } \end{figure} By default, the sub-figures are aligned on the baseline. This can be changed using the second optional argument of \verb|\subfigure|. This may be \texttt{t} (top), \texttt{c} (centered) or \texttt{b} (bottom). For example, the subfigures \subfigref{fig:circle2,fig:square2} in \figureref{fig:subfigex2} both have \verb|[c]| as the second optional argument. \begin{figure}[htbp] \floatconts {fig:subfigex2} {\caption{Another Example With Sub-Figures.}} {% \subfigure[A Small Circle][c]{\label{fig:circle2}% \includegraphics[width=0.1\linewidth]{images/circle}}% \qquad \subfigure[A Square][c]{\label{fig:square2}% \includegraphics[width=0.2\linewidth]{images/square}} } \end{figure} \subsection{Sub-Tables} \label{sec:subtables} There is an analogous command \verb|\subtable| for sub-tables. It has the same syntax as \verb|\subfigure| described above. You can reference the table using \verb|\tableref|, for example \tableref{tab:subtabex} or you can reference part of the table, for example \tableref{tab:ab}. Alternatively you can reference the subtable using \verb|\subtabref|, for example \subtabref{tab:ab,tab:cd} in \tableref{tab:subtabex}. \begin{table}[htbp] \floatconts {tab:subtabex} {\caption{An Example With Sub-Tables}} {% \subtable{% \label{tab:ab}% \begin{tabular}{cc} \bfseries A & \bfseries B\\ 1 & 2 \end{tabular} }\qquad \subtable{% \label{tab:cd}% \begin{tabular}{cc} \bfseries C & \bfseries D\\ 3 & 4\\ 5 & 6 \end{tabular} } } \end{table} By default, the sub-tables are aligned on the top. This can be changed using the second optional argument of \verb|\subtable|. This may be \texttt{t} (top), \texttt{c} (centered) or \texttt{b} (bottom). For example, the sub-tables \subtabref{tab:ab2,tab:cd2} in \tableref{tab:subtabex2} both have \verb|[c]| as the second optional argument. \begin{table}[htbp] \floatconts {tab:subtabex2} {\caption{Another Example With Sub-Tables}} {% \subtable[][c]{% \label{tab:ab2}% \begin{tabular}{cc} \bfseries A & \bfseries B\\ 1 & 2 \end{tabular} }\qquad \subtable[][c]{% \label{tab:cd2}% \begin{tabular}{cc} \bfseries C & \bfseries D\\ 3 & 4\\ 5 & 6 \end{tabular} } } \end{table} \subsection{Algorithms} \label{sec:algorithms} Enumerated textual algorithms can be displayed using the \texttt{algorithm} environment. Within this environment, use \verb|\caption| to set the caption and you can use an \texttt{enumerate} or nested \texttt{enumerate} environments. For example, see \algorithmref{alg:gauss}. Note that algorithms float like figures and tables. \begin{algorithm}[htbp] \floatconts {alg:gauss}% {\caption{The Gauss-Seidel Algorithm}}% {% \begin{enumerate} \item For $k=1$ to maximum number of iterations \begin{enumerate} \item For $i=1$ to $n$ \begin{enumerate} \item $x_i^{(k)} = \frac{b_i - \sum_{j=1}^{i-1}a_{ij}x_j^{(k)} - \sum_{j=i+1}^{n}a_{ij}x_j^{(k-1)}}{a_{ii}}$ \item If $\|\vec{x}^{(k)}-\vec{x}^{(k-1)} < \epsilon\|$, where $\epsilon$ is a specified stopping criteria, stop. \end{enumerate} \end{enumerate} \end{enumerate} }% \end{algorithm} If you'd rather have the same numbering throughout the algorithm but still want the convenient indentation of nested \texttt{enumerate} environments, you can use the \texttt{enumerate*} environment provided by the \textsf{jmlr} class. For example, see \algorithmref{alg:moore}. \begin{algorithm} \floatconts {alg:moore}% {\caption{Moore's Shortest Path}}% {% Given a connected graph $G$, where the length of each edge is 1: \begin{enumerate*} \item Set the label of vertex $s$ to 0 \item Set $i=0$ \begin{enumerate*} \item \label{step:locate}Locate all unlabelled vertices adjacent to a vertex labelled $i$ and label them $i+1$ \item If vertex $t$ has been labelled, \begin{enumerate*} \item[] the shortest path can be found by backtracking, and the length is given by the label of $t$. \end{enumerate*} otherwise \begin{enumerate*} \item[] increment $i$ and return to step~\ref{step:locate} \end{enumerate*} \end{enumerate*} \end{enumerate*} }% \end{algorithm} Pseudo code can be displayed using the \texttt{algorithm2e} environment. This is defined by the \textsf{algorithm2e} package (which is automatically loaded) so check the \textsf{algorithm2e} documentation for further details.\footnote{Either \texttt{texdoc algorithm2e} or \url{http://www.ctan.org/pkg/algorithm2e}} For an example, see \algorithmref{alg:net}. \begin{algorithm2e} \caption{Computing Net Activation} \label{alg:net} % older versions of algorithm2e have \dontprintsemicolon instead % of the following: %\DontPrintSemicolon % older versions of algorithm2e have \linesnumbered instead of the % following: %\LinesNumbered \KwIn{$x_1, \ldots, x_n, w_1, \ldots, w_n$} \KwOut{$y$, the net activation} $y\leftarrow 0$\; \For{$i\leftarrow 1$ \KwTo $n$}{ $y \leftarrow y + w_i*x_i$\; } \end{algorithm2e} \section{Description Lists} The \textsf{jmlr} class also provides a description-like environment called \texttt{altdescription}. This has an argument that should be the widest label in the list. Compare: \begin{description} \item[add] A method that adds two variables. \item[differentiate] A method that differentiates a function. \end{description} with \begin{altdescription}{differentiate} \item[add] A method that adds two variables. \item[differentiate] A method that differentiates a function. \end{altdescription} \section{Theorems, Lemmas etc} \label{sec:theorems} The following theorem-like environments are predefined by the \textsf{jmlr} class: \texttt{theorem}, \texttt{example}, \texttt{lemma}, \texttt{proposition}, \texttt{remark}, \texttt{corollary}, \texttt{definition}, \texttt{conjecture} and \texttt{axiom}. You can use the \texttt{proof} environment to display the proof if need be, as in \theoremref{thm:eigenpow}. \begin{theorem}[Eigenvalue Powers]\label{thm:eigenpow} If $\lambda$ is an eigenvalue of $\vec{B}$ with eigenvector $\vec{\xi}$, then $\lambda^n$ is an eigenvalue of $\vec{B}^n$ with eigenvector $\vec{\xi}$. \begin{proof} Let $\lambda$ be an eigenvalue of $\vec{B}$ with eigenvector $\xi$, then \begin{align*} \vec{B}\vec{\xi} &= \lambda\vec{\xi} \intertext{premultiply by $\vec{B}$:} \vec{B}\vec{B}\vec{\xi} &= \vec{B}\lambda\vec{\xi}\\ \Rightarrow \vec{B}^2\vec{\xi} &= \lambda\vec{B}\vec{\xi}\\ &= \lambda\lambda\vec{\xi}\qquad \text{since }\vec{B}\vec{\xi}=\lambda\vec{\xi}\\ &= \lambda^2\vec{\xi} \end{align*} Therefore true for $n=2$. Now assume true for $n=k$: \begin{align*} \vec{B}^k\vec{\xi} &= \lambda^k\vec{\xi} \intertext{premultiply by $\vec{B}$:} \vec{B}\vec{B}^k\vec{\xi} &= \vec{B}\lambda^k\vec{\xi}\\ \Rightarrow \vec{B}^{k+1}\vec{\xi} &= \lambda^k\vec{B}\vec{\xi}\\ &= \lambda^k\lambda\vec{\xi}\qquad \text{since }\vec{B}\vec{\xi}=\lambda\vec{\xi}\\ &= \lambda^{k+1}\vec{\xi} \end{align*} Therefore true for $n=k+1$. Therefore, by induction, true for all $n$. \end{proof} \end{theorem} \begin{lemma}[A Sample Lemma]\label{lem:sample} This is a lemma. \end{lemma} \begin{remark}[A Sample Remark]\label{rem:sample} This is a remark. \end{remark} \begin{corollary}[A Sample Corollary]\label{cor:sample} This is a corollary. \end{corollary} \begin{definition}[A Sample Definition]\label{def:sample} This is a definition. \end{definition} \begin{conjecture}[A Sample Conjecture]\label{con:sample} This is a conjecture. \end{conjecture} \begin{axiom}[A Sample Axiom]\label{ax:sample} This is an axiom. \end{axiom} \begin{example}[An Example]\label{ex:sample} This is an example. \end{example} \section{Color vs Grayscale} \label{sec:color} It's helpful if authors supply grayscale versions of their images in the event that the article is to be incorporated into a black and white printed book. With external PDF, PNG or JPG graphic files, you just need to supply a grayscale version of the file. For example, if the file is called \texttt{myimage.png}, then the gray version should be \texttt{myimage-gray.png} or \texttt{myimage-gray.pdf} or \texttt{myimage-gray.jpg}. You don't need to modify your code. The \textsf{jmlr} class checks for the existence of the grayscale version if it is print mode (provided you have used \verb|\includegraphics| and haven't specified the file extension). You can use \verb|\ifprint| to determine which mode you are in. For example, in \figureref{fig:nodes}, the \ifprint{dark gray}{purple} ellipse represents an input and the \ifprint{light gray}{yellow} ellipse represents an output. Another example: {\ifprint{\bfseries}{\color{red}}important text!} You can use the class option \texttt{gray} to see how the document will appear in gray scale mode. \textcolor{blue}{Colored text} will automatically be converted to gray scale in print mode. The \textsf{jmlr} class loads the \textsf{xcolor} package, so you can also define your own colors. For example: \ifprint {\definecolor{myred}{gray}{0.5}}% {\definecolor{myred}{rgb}{0.5,0,0}}% \textcolor{myred}{XYZ}. The \textsf{xcolor} class is loaded with the \texttt{x11names} option, so you can use any of the x11 predefined colors (listed in the \textsf{xcolor} documentation\footnote{either \texttt{texdoc xcolor} or \url{http://www.ctan.org/pkg/xcolor}}). \section{Citations and Bibliography} \label{sec:cite} The \textsf{jmlr} class automatically loads \textsf{natbib} and automatically sets the bibliography style, so you don't need to use \verb|\bibliographystyle|. This sample file has the citations defined in the accompanying BibTeX file \texttt{jmlr-sample.bib}. For a parenthetical citation use \verb|\citep|. For example \citep{guyon-elisseeff-03}. For a textual citation use \verb|\citet|. For example \citet{guyon2007causalreport}. Both commands may take a comma-separated list, for example \citet{guyon-elisseeff-03,guyon2007causalreport}. These commands have optional arguments and have a starred version. See the \textsf{natbib} documentation for further details.\footnote{Either \texttt{texdoc natbib} or \url{http://www.ctan.org/pkg/natbib}} The bibliography is displayed using \verb|\bibliography|. \acks{Acknowledgements go here.} \bibliography{jmlr-sample} \appendix \section{First Appendix}\label{apd:first} This is the first appendix. \section{Second Appendix}\label{apd:second} This is the second appendix. \end{document}