On the structure of nonarchimedean exponential fields I |
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Authors: | Salma Kuhlmann |
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Affiliation: | (1) Mathematisches Institut der Universität Heidelberg, Im Neuenheimer Feld 288, D-69120 Heidelberg, Germany |
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Abstract: | Given an ordered fieldK, we compute the natural valuation and skeleton of the ordered multiplicative group (K>0, ·, 1, <) in terms of those of the ordered additive group (K,+,0,<). We use this computation to provide necessary and sufficient conditions on the value groupv(K) and residue field , for theL![infin](/content/r316ln60000n6875/xxlarge8734.gif) -equivalence of the above mentioned groups. We then apply the results to exponential fields, and describev(K) in that case. Finally, ifK is countable or a power series field, we derive necessary and sufficient conditions onv(K) and forK to be exponential. In the countable case, we get a structure theorem forv(K).This paper represents some results of the author's doctoral thesisThis paper was written while the author was supported by a research grant from the University of Heidelberg |
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