公式/英文字体不对，ieee comsoc 期刊模版，mac系统

用的xelatex,感觉是数学符号字体的问题？比如这个小k明显不一样，一个往下弯曲，一个向上的。是否能将数学符号的字体改成latin modern，怎么设置呢。我是一个新手，谢谢您的回答。

有或者可能是settings文件的问题吗，我是照着教程复制settings.json的
文件内容如下：

{

"latex-workshop.latex.tools": [
    {
    "name": "latexmk",
    "command": "latexmk",
    "args": [
    "-synctex=1",
    "-interaction=nonstopmode",
    "-file-line-error",
    "-pdf",
    "%DOC%"
    ]
    },
    {
    "name": "xelatex",
    "command": "xelatex",
    "args": [
    "-synctex=1",
    "-interaction=nonstopmode",
    "-file-line-error",
    "%DOC%"
        ]
    },          
    {
    "name": "pdflatex",
    "command": "pdflatex",
    "args": [
    "-synctex=1",
    "-interaction=nonstopmode",
    "-file-line-error",
    "%DOC%"
    ]
    },
    {
    "name": "bibtex",
    "command": "bibtex",
    "args": [
    "%DOCFILE%"
    ]
    }
],

"latex-workshop.latex.recipes": [

    {
    "name": "xelatex",
    "tools": [
    "xelatex"
                ]
            },
    {
    "name": "latexmk",
    "tools": [
    "latexmk"
                ]
    },

    {
    "name": "pdflatex -> bibtex -> pdflatex*2",
    "tools": [
    "pdflatex",
    "bibtex",
    "pdflatex",
    "pdflatex"
                ]
    },
    {  
      "name": "xelatex->bibtex->xelatex->xelatex",  
      "tools": [  
        "xelatex",  
        "bibtex",  
        "xelatex",  
      ]  
    }  
],

"latex-workshop.view.pdf.viewer": "browser",
"latex-workshop.latex.clean.fileTypes": [

"*.aux",
"*.bbl",
"*.blg",
"*.idx",
"*.ind",
"*.lof",
"*.lot",
"*.out",
"*.toc",
"*.acn",
"*.acr",
"*.alg",
"*.glg",
"*.glo",
"*.gls",
"*.ist",
"*.fls",
"*.log",
"*.fdb_latexmk"
],

//下面这段是语法检查模块
//{
"ltex.enabled": true, // 设置语言，这里是德语
// 要英语就下载对应 English Support，然后这里填 en, 或者 en-US,en-GB 等*/

}

我看你的代码中用到了 \usepackage{newtxmath}。

@u20011
我把这个包注释了，然后倒入了lmodern，小写的k对了，但是公式还是不对，好奇怪呀，我是昨天刚下好在试着写，遇到了这个问题。谢谢您的回答。

@u20011

然后两个我都用的话，字体对了，但是公式里的加号求和号都没了……晕

应该是 .cls 文件里强制使用了 newtxmath，既然是模板要求，就别改了吧。

.cls 文件中说道：

% comsoc, if a Times math font was not loaded by user, enforce it
\def\@IEEEcomsocenforcemathfont{\typeout{** Times compatible math font not found, forcing.}\relax
\IfFileExists{newtxmath.sty}{\typeout{-- Found newtxmath, loading.}\RequirePackage{newtxmath}}{\@@IEEEcomsocenforcemathfont}}
\def\@@IEEEcomsocenforcemathfont{\IfFileExists{mtpro2.sty}{\typeout{-- Found mtpro2, loading.}\RequirePackage{mtpro2}}{\@@@IEEEcomsocenforcemathfont}}
\def\@@@IEEEcomsocenforcemathfont{\IfFileExists{mt11p.sty}{\typeout{-- Found mt11p, loading.}\RequirePackage{mt11p}}{\@@@@IEEEcomsocenforcemathfont}}
\def\@@@@IEEEcomsocenforcemathfont{\IfFileExists{mathtime.sty}{\typeout{-- Found mathtime, loading.}\RequirePackage{mathtime}}{\@@@@@IEEEcomsocenforcemathfont}}
% if no acceptable Times math font package found, error with newtxmath requirement
\def\@@@@@IEEEcomsocenforcemathfont{\typeout{** No Times compatible math font package found. newtxmath is required.}\RequirePackage{newtxmath}}

.cls 里：

% comsoc, if a Times math font was not loaded by user, enforce it
\def\@IEEEcomsocenforcemathfont{\typeout{** Times compatible math font not found, forcing.}\relax
\IfFileExists{newtxmath.sty}{\typeout{-- Found newtxmath, loading.}\RequirePackage{newtxmath}}{\@@IEEEcomsocenforcemathfont}}
\def\@@IEEEcomsocenforcemathfont{\IfFileExists{mtpro2.sty}{\typeout{-- Found mtpro2, loading.}\RequirePackage{mtpro2}}{\@@@IEEEcomsocenforcemathfont}}
\def\@@@IEEEcomsocenforcemathfont{\IfFileExists{mt11p.sty}{\typeout{-- Found mt11p, loading.}\RequirePackage{mt11p}}{\@@@@IEEEcomsocenforcemathfont}}
\def\@@@@IEEEcomsocenforcemathfont{\IfFileExists{mathtime.sty}{\typeout{-- Found mathtime, loading.}\RequirePackage{mathtime}}{\@@@@@IEEEcomsocenforcemathfont}}
% if no acceptable Times math font package found, error with newtxmath requirement
\def\@@@@@IEEEcomsocenforcemathfont{\typeout{** No Times compatible math font package found. newtxmath is required.}\RequirePackage{newtxmath}}

模板要求用 Times，为什么要改呢？