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Transactions of the American Mathematical Society

ISSN 1088-6850(online) ISSN 0002-9947(print)

 

 

The rank of a Hardy field


Author: Maxwell Rosenlicht
Journal: Trans. Amer. Math. Soc. 280 (1983), 659-671
MSC: Primary 12D15; Secondary 12H05, 13N05, 26A12, 34E05, 41A60
DOI: https://doi.org/10.1090/S0002-9947-1983-0716843-5
MathSciNet review: 716843
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Abstract: A Hardy field is a field of germs of real-valued functions on positive half-lines that is closed under differentiation. Its rank is the rank of the associated ordered abelian group, the value group of the canonical valuation of the field. The properties of this rank are worked out, its relevance to asymptotic expansions indicated, examples provided, and applications given to the order of growth of solutions of ordinary differential equations.


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DOI: https://doi.org/10.1090/S0002-9947-1983-0716843-5
Article copyright: © Copyright 1983 American Mathematical Society