Mathematical Sciences Classification System
42-XX - Harmonic analysis on Euclidean spaces
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                            42-00General reference works (handbooks, dictionaries, bibliographies, etc.)
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                            42-01Instructional exposition (textbooks, tutorial papers, etc.)
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                            42-02Research exposition (monographs, survey articles)
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                            42-03Historical (must also be assigned at least one classification number from Section 01)
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                            42-04Explicit machine computation and programs (not the theory of computation or programming)
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                            42-06Proceedings, conferences, collections, etc.
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                            (+54)Harmonic analysis in one variable
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                            (+139)Harmonic analysis in several variables
{For automorphic theory, see mainly 11F30} - 
                            
                            (+169)Nontrigonometric harmonic analysis