沒電腦時，靠數學功底，那時都是求解析解或近似解析解；郭永懷在做博士論文時就在這方麵有很重要的成果。

來源: 法眼於 2020-07-07 17:35:17 [舊帖] [給我悄悄話] 本文已被閱讀：次

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