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Images of Additive Polynomials in $\FF_q ((t))$ Have the Optimal Approximation Property

  Published:2002-03-01
 Printed: Mar 2002
  • Lou van den Dries
  • Franz-Viktor Kuhlmann
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Abstract

We show that the set of values of an additive polynomial in several variables with arguments in a formal Laurent series field over a finite field has the optimal approximation property: every element in the field has a (not necessarily unique) closest approximation in this set of values. The approximation is with respect to the canonical valuation on the field. This property is elementary in the language of valued rings.
MSC Classifications: 12J10, 12L12, 03C60 show english descriptions Valued fields
Model theory [See also 03C60]
Model-theoretic algebra [See also 08C10, 12Lxx, 13L05]
12J10 - Valued fields
12L12 - Model theory [See also 03C60]
03C60 - Model-theoretic algebra [See also 08C10, 12Lxx, 13L05]
 

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