Corrigendum to: “On ordering free groups” [J. Symbolic Comput. 40 (2005) 1285–1290]
نویسندگان
چکیده
منابع مشابه
On ordering free groups
The positive cones of the left orders on a free group can be described by their finite subsets. An algorithm is given for recognizing when a finite subset of a free group lies in a positive cone. This is used to show how one can construct a sequence of finite subsets of a positive cone whose union is the positive cone. Moreover, the method gives an overview of the positive cones of a free group...
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In [4] we put in relation graphs with Dilworth number at most two and the two classes LPG and mLPG. In order to prove this relation, we have heavily exploited a result we deduced from [1]. We have now realized that this result is not always true, so in this corrigendum we correctly restate the result concerning the relation between graphs with Dilworth number at most two and the two classes of ...
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[This corrects the article DOI: 10.5936/csbj.201210010.].
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We consider the family of relative Thue equations x − (t− 1)xy − (t+ 2)xy − y = μ, where the parameter t, the root of unity μ and the solutions x and y are integers in the same imaginary quadratic number field. We prove that there are only trivial solutions (with |x|, |y| ≤ 1), if |t| is large enough or if the discriminant of the quadratic number field is large enough or if Re t = −1/2 (there a...
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ژورنال
عنوان ژورنال: Journal of Symbolic Computation
سال: 2009
ISSN: 0747-7171
DOI: 10.1016/j.jsc.2009.04.004