r - Bookdown to PDF Theorem Environment Duplicate

Question

我正在做一个 bookdown 项目，遇到了定理环境的问题。当我编译为 gitbook、epub_book 或 tufte_html_book 时它可以工作，但是 不是 到 pdf_book。以下是我的 index.Rmd 文件

--- 
title: "Blah Blah"
author: "Me"
date: "`r Sys.Date()`"
site: bookdown::bookdown_site
documentclass: krantz
bibliography: [book.bib, packages.bib]
biblio-style: apalike
link-citations: yes
description: "This is a minimal example of using the bookdown package to write a book. The output format for this example is bookdown::gitbook."
header-includes:
- \usepackage{amsthm}
- \newtheorem{definition}{Definition}
- \newtheorem{lemma}{Lemma}
- \newtheorem{theorem}{Theorem}
- \newtheorem{example}{Example}
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)

# First Chapter

The content of Preface. [@xie2015]

```{theorem, name="Infinite Group"}
A group having an infinite number of elements.
```

```{example}
The set $(\mathbb{Z}, +)$ is an infinite group.
```

这是我在 _output.yml 文件(相关部分)上的内容:

bookdown::pdf_book:
  includes:
    in_header: preamble.tex
  latex_engine: xelatex
  citation_package: natbib
  keep_tex: yes
  pandoc_args: --top-level-division=chapter

preamble.tex 只有 \usepackage{booktabs}
这是我编译时得到的:


似乎定理的名称和实际内容被视为两个不同的定理，以及示例。在定义和引理方面也是如此。即使我删除

header-includes:
    - \usepackage{amsthm}
    - \newtheorem{definition}{Definition}
    - \newtheorem{lemma}{Lemma}
    - \newtheorem{theorem}{Theorem}
    - \newtheorem{example}{Example}

从 yaml header ，我仍然遇到同样的问题。有想法该怎么解决这个吗？

Answer 1

这是一个已知的错误，和 has been fixed在的开发版中针织 .你可以试试:

remotes::install_github('yihui/knitr')
install.packages('bookdown')  # update bookdown