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Update 2020-05-17-矩阵求导的Trace-Trick.md
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Expand Up @@ -90,7 +90,7 @@ $$
- $$tr(X^\top) = tr(X)$$ 转置trace一样
- $$tr(A+B) = tr(A)+tr(B)$$ 线性拆分
- $$tr(A^\top B) = tr(B^\top A)$$ 满足交换律
- $$tr(A^\top (B \circ C)) = tr((A \circ B)^\top C)$$,这里三个矩阵$$A,B,C$$的大小相同。
- $$tr(A^\top (B \circ C)) = tr((A \circ B)^\top C)$$,这里三个矩阵$$A,B,C$$的大小相同。证明略。

# 举例

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