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arXiv · 1108.3311

Free fields in Malcev-Neumann series rings

Vitor O. Ferreira·Érica Z. Fornaroli·Javier Sánchez
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Abstract

It is shown that the skew field of Malcev-Neumann series of an ordered group frequently contains a free field of countable rank, i.e. the universal field of fractions of a free associative algebra of countable rank. This is an application of a criterion on embeddability of free fields on skew fields which are complete with respect to a valuation function, following K. Chiba. Other applications to skew Laurent series rings are discussed. Finally, embeddability questions on free fields of uncountable rank in Malcev-Neumann series rings are also considered.

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Vitor O. Ferreira, Érica Z. Fornaroli, Javier Sánchez. 2011-08-16. Free fields in Malcev-Neumann series rings. https://arxiv.org/abs/1108.3311

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