Mathematical Sciences Classification System
26-XX - Real functions [See also 54C30]
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                            26-00General reference works (handbooks, dictionaries, bibliographies, etc.)
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                            26-01Instructional exposition (textbooks, tutorial papers, etc.)
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                            26-02Research exposition (monographs, survey articles)
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                            26-03Historical (must also be assigned at least one classification number from Section 01)
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                            26-04Explicit machine computation and programs (not the theory of computation or programming)
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                            26-06Proceedings, conferences, collections, etc.
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                            (+154)Functions of one variable
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                            (+60)Functions of several variables
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                            (+8)Polynomials, rational functions
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                            (+47)
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                            (+49)Miscellaneous topics
[See also 58Cxx]