在jupyter笔记本中将markdown转换为pdf时出错

Question

我无法将markdown笔记本转换为pdf，但能够转换代码单元。

我得到的错误是：

500 : Internal Server Error
The error was:
nbconvert failed: PDF creating failed

[I 10:32:16.940 NotebookApp] Running pdflatex 3 times: [u'pdflatex', u'notebook.tex']
[C 10:32:17.174 NotebookApp] pdflatex failed: [u'pdflatex', u'notebook.tex']
    This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015) (preloaded format=pdflatex)
     restricted \write18 enabled.
    entering extended mode
    (./notebook.tex
    LaTeX2e <2015/01/01>
    Babel <3.9l> and hyphenation patterns for 79 languages loaded.
 tex/latex/amsfonts/umsb.fd)

    LaTeX Warning: No \author given.

    ! Missing $ inserted.
    <inserted text> 
                    $
    l.232 ...l the conduits, \$ \frac{\Delta P}{\mu L}
                                                      \$ are set to be 1.0
    ? 
    ! Emergency stop.
    <inserted text> 
                    $
    l.232 ...l the conduits, \$ \frac{\Delta P}{\mu L}
                                                      \$ are set to be 1.0
    !  ==> Fatal error occurred, no output PDF file produced!
    Transcript written on notebook.log.

[I 10:32:17.175 NotebookApp] Running bibtex 1 time: [u'bibtex', u'notebook']
[W 10:32:17.262 NotebookApp] bibtex had problems, most likely because there were no citations
[I 10:32:17.262 NotebookApp] Running pdflatex 3 times: [u'pdflatex', u'notebook.tex']
[C 10:32:17.501 NotebookApp] pdflatex failed: [u'pdflatex', u'notebook.tex']
    This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015) (preloaded format=pdflatex)
     restricted \write18 enabled.
    entering extended mode

    LaTeX Warning: No \author given.

    ! Missing $ inserted.
    <inserted text> 
                    $
    l.232 ...l the conduits, \$ \frac{\Delta P}{\mu L}
                                                      \$ are set to be 1.0
    ? 
    ! Emergency stop.
    <inserted text> 
                    $
    l.232 ...l the conduits, \$ \frac{\Delta P}{\mu L}
                                                      \$ are set to be 1.0
    !  ==> Fatal error occurred, no output PDF file produced!
    Transcript written on notebook.log.

[W 10:32:17.503 NotebookApp] 500 GET /nbconvert/pdf/ComputerProject1.ipynb?download=true (::1): nbconvert failed: PDF creating failed
[E 10:32:17.505 NotebookApp] {
      "Accept-Language": "en-US,en;q=0.8", 
      "Accept-Encoding": "gzip, deflate, sdch", 
      "Connection": "keep-alive", 
      "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", 
      "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36", 
      "Host": "localhost:8888", 
      "Referer": "http://localhost:8888/notebooks/ComputerProject1.ipynb", 
      "Upgrade-Insecure-Requests": "1"
    }
[E 10:32:17.505 NotebookApp] 500 GET /nbconvert/pdf/ComputerProject1.ipynb?download=true (::1) 787.74ms referer=http://localhost:8888/notebooks/ComputerProject1.ipynb

我安装了pandoc，mactex。谁知道如何解决这个问题？

谢谢，