An existence theorem of continuous signal transfer operator is given.

证明了连续信号传输算子的存在定理。

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In this paper, an existence theorem of Q-processes for the both infinite case is established.

本文对“双无限”生灭拟Q矩阵，得到了生灭Q过程的存在定理。

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Using the principal curvature formula, we prove an existence theorem of Weingarten hypersurface.

并利用主曲率计算公式证明了W-超曲面的一个存在性定理。

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