我想使用 XeLaTeX 编译如下文件
\documentclass{article}
\usepackage{fontspec}
\begin{document}
$a_1+a_2+\cdots+a_n\geq n\sqrt[n]{a_1a_2\dots a_n}$
\end{document}
但存在一些错误：
/texmf-dist/tex/xelatex/euenc/eu1lmr.fd)kpathsea: 无效字体名称“[lmroman10-regular]”，包含“[”
! 字体 EU1/lmr/m/n/10=[lmroman10-regular]:mapping=tex-text at 10.0pt 无法加载：未找到公制 (TFM) 文件或已安装的字体。
放松 l.100 \fontencoding\encodingdefault\selectfont？
搜索后，我知道我必须安装软件包lm才能显示拉丁现代字体。所以我下载了软件包并将文件复制到正确的词典中，然后运行 texhash。但符号消失\geq了\cdots。日志文件显示：
LaTeX 字体警告：在输入行 4 上
OT1' has changed to对符号字体 (Font) 的 EU1 编码为“正常”。operators' in the math versionLaTeX 字体信息：在输入行 4 上覆盖符号字体
operators' in version正常'（字体）OT1/cmr/m/n --> EU1/lmr/m/n。LaTeX 字体警告：在输入行 4 上对符号字体 (Font) bold进行
OT1' has changed toEU1 编码。operators' in the math version
我该怎么办？
.log 文件
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(/texmf-dist/fontspec/fontspec.cfg))
No file add.aux.
\openout1 = `add.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for EU1/lmr/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
fontspec info: Adjusting the maths setup (use [no-math] to avoid this).
\symlegacymaths=\mathgroup5
LaTeX Font Info: Overwriting symbol font `legacymaths' in version `bold'
(Font) OT1/cmr/m/n --> OT1/cmr/bx/n on input line 2.
LaTeX Font Info: Redeclaring math accent \acute on input line 2.
LaTeX Font Info: Redeclaring math accent \grave on input line 2.
LaTeX Font Info: Redeclaring math accent \ddot on input line 2.
LaTeX Font Info: Redeclaring math accent \tilde on input line 2.
LaTeX Font Info: Redeclaring math accent \bar on input line 2.
LaTeX Font Info: Redeclaring math accent \breve on input line 2.
LaTeX Font Info: Redeclaring math accent \check on input line 2.
LaTeX Font Info: Redeclaring math accent \hat on input line 2.
LaTeX Font Info: Redeclaring math accent \dot on input line 2.
LaTeX Font Info: Redeclaring math accent \mathring on input line 2.
LaTeX Font Info: Redeclaring math symbol \colon on input line 2.
LaTeX Font Info: Redeclaring math symbol \Gamma on input line 2.
LaTeX Font Info: Redeclaring math symbol \Delta on input line 2.
LaTeX Font Info: Redeclaring math symbol \Theta on input line 2.
LaTeX Font Info: Redeclaring math symbol \Lambda on input line 2.
LaTeX Font Info: Redeclaring math symbol \Xi on input line 2.
LaTeX Font Info: Redeclaring math symbol \Pi on input line 2.
LaTeX Font Info: Redeclaring math symbol \Sigma on input line 2.
LaTeX Font Info: Redeclaring math symbol \Upsilon on input line 2.
LaTeX Font Info: Redeclaring math symbol \Phi on input line 2.
LaTeX Font Info: Redeclaring math symbol \Psi on input line 2.
LaTeX Font Info: Redeclaring math symbol \Omega on input line 2.
LaTeX Font Info: Redeclaring math symbol \mathdollar on input line 2.
LaTeX Font Info: Redeclaring symbol font `operators' on input line 2.
LaTeX Font Warning: Encoding `OT1' has changed to `EU1' for symbol font
(Font) `operators' in the math version `normal' on input line 2.
LaTeX Font Info: Overwriting symbol font `operators' in version `normal'
(Font) OT1/cmr/m/n --> EU1/lmr/m/n on input line 2.
LaTeX Font Warning: Encoding `OT1' has changed to `EU1' for symbol font
(Font) `operators' in the math version `bold' on input line 2.
LaTeX Font Info: Overwriting symbol font `operators' in version `bold'
(Font) OT1/cmr/bx/n --> EU1/lmr/m/n on input line 2.
LaTeX Font Info: Overwriting symbol font `operators' in version `normal'
(Font) EU1/lmr/m/n --> EU1/lmr/m/n on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathrm' in version `normal'
(Font) EU1/lmr/m/n --> EU1/lmr/m/n on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathit' in version `normal'
(Font) OT1/cmr/m/it --> EU1/lmr/m/it on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathbf' in version `normal'
(Font) OT1/cmr/bx/n --> EU1/lmr/bx/n on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathsf' in version `normal'
(Font) OT1/cmss/m/n --> EU1/lmss/m/n on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathtt' in version `normal'
(Font) OT1/cmtt/m/n --> EU1/lmtt/m/n on input line 2.
LaTeX Font Info: Overwriting symbol font `operators' in version `bold'
(Font) EU1/lmr/m/n --> EU1/lmr/bx/n on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathrm' in version `bold'
(Font) EU1/lmr/m/n --> EU1/lmr/bx/n on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathit' in version `bold'
(Font) OT1/cmr/bx/it --> EU1/lmr/bx/it on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathsf' in version `bold'
(Font) OT1/cmss/bx/n --> EU1/lmss/bx/n on input line 2.
LaTeX Font Info: Overwriting math alphabet `\mathtt' in version `bold'
(Font) OT1/cmtt/m/n --> EU1/lmtt/bx/n on input line 2.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <7> on input line 2.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <5> on input line 2.
LaTeX Font Info: Try loading font information for U+lasy on input line 2.
(/texmf-dist/base/ulasy.fd
File: ulasy.fd 1998/08/17 v2.2e LaTeX symbol font definitions
) [1
] (./add.aux) )
Here is how much of TeX's memory you used:
9835 strings out of 495690
172429 string characters out of 1189631
1246752 words of memory out of 4200616
12942 multiletter control sequences out of 15000+50000
3990 words of font info for 20 fonts, out of 3000000 for 5000
14 hyphenation exceptions out of 8191
38i,6n,35p,608b,109s stack positions out of 5000i,500n,10000p,200000b,50000s
Output written on add.pdf (1 page).
我将两个 pdf（包括 lmodern 包或不包括）上传到http://ifile.it/q0pdnra/test.zip。
答案1
你的例子对我来说很好用。另外，如果我加载 lmodern，也不会出现错误（如果你加载了它，你应该加载它前fontspec，因为如果稍后加载，它将破坏 fontspec 的字体选择系统）。检查您的软件包版本。我正在使用：
fontspec.sty 2011/02/26 v2.1f Advanced font selection for XeLaTeX/LuaLaTeX
eu1enc.def 2010/05/27 v0.1h Experimental Unicode font encodings
eu1lmr.fd 2009/10/30 v1.6 Font defs for Latin Modern