单词	harmonic analysis
释义	harmonic analysis noun : the expression of a periodic function as a sum of sines and cosines and specifically by a Fourier series Example Sentences Recent Examples on the Web Croot introduced powerful new methods from harmonic analysis — a branch of math closely related to calculus — to confirm the Erdős-Graham prediction. Quanta Magazine, 9 Mar. 2022 After introducing new ideas in harmonic analysis and obtaining important results in an area called Calderón-Zygmund operator theory in the 1970s, Meyer wandered to the fledgling study of wavelets in the mid-1980s. Quanta Magazine, 21 Mar. 2017 Word History First Known Use 1867, in the meaning defined above
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