counterserrorsnumberingtheorems
I got an exception in the following latex code: "No Counter Theorem1 is defined", what is the problem?
\documentclass[conference]{IEEEtran}
\newtheorem{definition}[theorem1]{Definition}
\begin{document}
\title{Title}
\maketitle
\begin{abstract}
%\boldmath
The abstract goes here.
\end{abstract}
\section{Introduction}
\begin{definition}[dd]
sdfa
\end{definition}
\end{document}
As tohecz mentions in his comment, the difference in the styles that you mention is the one of the amsthm package: however, the amsbook class internally defines the remark and definition styles in a different way. Here are the definitions:
\def\th@definition{%
\let\thm@indent\indent
\thm@headfont{\scshape}% heading font small caps
\let\thmhead\thmhead@plain \let\swappedhead\swappedhead@plain
\thm@preskip.5\baselineskip\@plus.2\baselineskip
\@minus.2\baselineskip
\thm@postskip\thm@preskip
\upshape
}
\def\th@remark{%
\let\thm@indent\indent
\thm@headfont{\scshape}% heading font small caps
\let\thmhead\thmhead@plain \let\swappedhead\swappedhead@plain
\thm@preskip.5\baselineskip\@plus.2\baselineskip
\@minus.2\baselineskip
\thm@postskip\thm@preskip
\upshape
}
As you can see, both styles behave exactly the same when using amsbook.cls.
When you say
\newtheorem{abc}{Abc}[section]
\newtheorem{xyz}[abc]{Xyz}
you're telling LaTeX that the statement environments abc and xyz must share the counter; so no counter xyz is defined.
You could do
\theoremstyle{definition}
\newtheorem{Gcal}{Grande Caloria \textit{Cal} o \textit{kcal}}[section]
\newtheorem{Pcal}[Gcal]{Piccola Caloria \textit{cal}}
\newtheorem{CalS}[Gcal]{Calore Specifico}
Note that one \theoremstyle{definition} declaration suffices.
Actually there's a better way.
\documentclass[12pt,a4paper]{report}
\usepackage[T1]{fontenc}
\usepackage[italian]{babel}
\usepackage[utf8]{inputenc}
\usepackage{amssymb,amsthm,mathtools}
\usepackage{amsmath, textcomp}
\usepackage{titling}
\theoremstyle{definition}
\newtheorem{vardef*}{\vardefname}[section]
\newcommand\vardefname{} % initialize
\newenvironment{vardef}[1]
{\renewcommand\vardefname{#1}\begin{vardef*}}
{\end{vardef*}}
\begin{document}
\chapter{1}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\chapter{2}
\section{2.1}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\begin{vardef}{Grande Caloria \textit{Cal} o \textit{kcal}}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\end{vardef}
\begin{vardef}{Piccola Caloria \textit{cal}}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\end{vardef}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\begin{vardef}{Calore Specifico}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\end{vardef}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\end{document}
You have just a generic environment for definitions and give the title at statement time rather than having a different environment for each in the preamble.
Best Answer
You have declared a new theorem type "Definition" which uses the counter of the theorem type "theorem1" -- but such a type hasn't been declared. The following works: