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【很牛掰的经典】矩阵加速，矩阵里的元素也是矩阵，

Posted by WilliamACM at 2013-01-21 17:16:54 on Problem 3233

| A+A2+A3+……Ak |   |A   A| (k-1）次方   | A |
|                | = |     |              |   |
|     E          |   |0   E|              | E |

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