As applications, we build its equivalent form and the analogue general double series inequalities.

作为应用，建立它的等价形式及对应二重级数的最佳推广不等式。

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In this paper double series of functions with posititve coefficients are discussed and a natural condition of the convergence is obtained with the aid of matrix methods.

本文利用矩阵方法对二重函数项级数进行讨论，得到了极其自然的收敛条件。

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The "double bubble" D8 Series concept is based on a modified tube and wing with a very wide fuselage to provide extra lift.

这款“双气泡”D8系列设计通过将机舱与机翼融合从而形成了一个相对较宽的机身从而提供额外的载客量。

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Hibbert had his first double-double of the series.

NPR: Pacers Finish Off Hawks, Win Game 6 81-73

That earned the duo their fourth double-foul in this series with Randolph getting a technical.

NPR: Grizzlies Advance With 118-105 Win Over Clippers

The side will again be led by Graeme Smith, who hit two double centuries in the drawn series in England in 2003.

BBC: SA recall Nel for England series