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傅立葉分析 [1] 是數學中的一種研究方法，主要研究一般函數如何用更簡單的三角函數之和來表示，而分解過程又被稱為傅里葉變換。傅里葉分析源於人們對傅里葉級數的研究。傅里葉分析以約瑟夫·傅里葉的名字命名。
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