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main.tex

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+\documentclass[11pt]{article}
+
+\usepackage[sans]{myctex}
+
+
+\title{思源黑体 + FiraGO}
+\date{\today}
+
+\begin{document}
+\maketitle
+
+test math font.
+
+\[
+G'=(V,E)
+\]
+\textbf{math!!! 粗的!}
+$MATH$
+
+\section{is this bold $MATH \Z$?}
+\section{这是bold $\text{你好abc}\R$?}
+\begin{theorem}[sbada]
+    aaa
+\end{theorem}
+
+\begin{equation}
+\begin{aligned}
+\min&   &   \sum_x \delta_x&    &   &\\
+s.t.&   &   (1-\delta_x - \delta_y) d^2(x,y)\leq \|v_x-v_y\|^2 &\leq (c^2+(\delta_x+\delta_y)f(k)) d^2(x,y) &   &\forall x,y\in X\\
+    &   &   \delta_x\in [0,1], v_x&\in \R^p   &   &\forall x\in X
+\end{aligned}
+\end{equation}
+
+
+\end{document}