0

I'm submitting an article to the Journal of Combinatoric. Now I need to follow these two requirements.

(1): In a paper divided into sections, it is desirable to number theorems, lemmas, definitions, corollaries, examples, etc. consecutively using double Arabic numerals. (E.g., Section 3 may start with Definition 3.1 followed by Remark 3.2 and Theorem 3.3).

(2): Mark the end of proof by ∎. The same symbol, placed at the end of a statement, indicates the absence of proof.

The paper I have currently is like the following: (1): The paper is divided into sections. However, the theorems, lemmas, definitions, corollaries, examples, etc, are numbered consecutively, which has nothing to do with the section order what so ever; (2): The end of the proof is marked by a blank ∎, not ∎.

Do you know how to accomplish these two tasks? Many thanks for your time and attention.

1

The command \qed is defined in amsthm. By default it is a non-filled square, but can be changed by \renewcommand\qedsymbol{\ensuremath{\blacksquare}}. To use \blacksquare include also amssymb.

To number the theoremns etc withing the section you can use \newtheorem{theorem}{Theorem}[section].

An example (if I understand the requirements right):

\documentclass{article}
\usepackage{amsthm}
\usepackage{amssymb}
\renewcommand\qedsymbol{\ensuremath{\blacksquare}}
\newtheorem{theorem}{Theorem}[section]
\usepackage{lipsum}
\begin{document}
%%%%%%%%%%%%%%%%%%%%%
\section{Introduction}
\label{Sec:Intro}
\lipsum[1]
\begin{theorem}
  \label{Th:Obvious}
  Let $a$, $b$ and $c$ be real numbers. If $a\leq b$ and $b\leq c$, then $a\leq c$.
  \qed
\end{theorem}
%%%%%%%%%%%%%%%%%%%%%
\section{Complicated Theory}
\label{Sec:Complicated}
\lipsum[2]
\begin{theorem}
  \label{Th:Complicated}
  Let $a$, $b$ and $c$ be real numbers. If $a\leq b$ and $b\leq c$, then $\sum_{x\in\{a,b,c\}}x\leq 3c$.
\end{theorem}
\begin{proof}
  Follows directly from Theorem~\ref{Th:Obvious}. 
\end{proof}
%%%%%%%%%%%%%%%%%%%%%
\end{document}

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.