努力赶上 发表于 2025-3-30 09:03:37

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enmesh 发表于 2025-3-30 12:48:51

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查看完整版本: Titlebook: Fourier Analysis and Approximation; One Dimensional Theo Paul L. Butzer,Rolf J. Nessel Book 1971 Birkhäuser Verlag Basel 1971 Fourier serie