Another problem that mathematicians tackled from about 1880 on is essentially the converse of finding asymptotic series . 大概从1880年开始,数学家们研究的另一个问题本质上是求渐近级数的反问题。
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Asymptotic series solution of the characteristic equation of corrugated circular waveguide 波纹圆波导特征值的渐近解