关于正定矩阵逼近积和式的注记
A remark on approximating permanents of positive definite matrices
摘要:
设$A$是一个$n \times n$正定厄米特矩阵,其特征值在1和2之间。我们将$A$的积和式表示为${\Bbb R}^{2n}$上某个显式对数凹函数的积分。因此,存在用于$A$的永久性的完全多项式随机化近似方案(FPRAS)。
英文摘要:
Let $A$ be an $n \times n$ positive definite Hermitian matrix with all eigenvalues between 1 and 2. We represent the permanent of $A$ as the integral of some explicit log-concave function on ${\Bbb R}^{2n}$. Consequently, there is a fully polynomial randomized approximation scheme (FPRAS) for the permanent of $A$.
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