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先看看怎么写东西
$U_{i}(a_i,a_{
-
i})
=
\alpha a_i
+
\frac{
1
}{
2
}a_i
^
2
+
\gamma \sum_{j\in N(i)}{g_{ij}a_ia_j}$
120th anniversary of the whole Nanjing universities
Ge Jungle
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