Geodesic
A subfield $B$ of elements which are infinitely near to the base
Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika, no. 2 (2009), pp. 41-47 Cet article a éte moissonné depuis la source Math-Net.Ru

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In the article a statement is proved that elements which are infinitely near to the base form a subfield of 2-dimensionally ordered field.
Keywords: two-ordered fields, elements which are infinitely near to the base. 
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     title = {A~subfield~$B$ of elements which are infinitely near to the base},
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G. G. Pestov; E. A. Fomina. A subfield $B$ of elements which are infinitely near to the base. Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika, no. 2 (2009), pp. 41-47. http://geodesic.mathdoc.fr/item/VTGU_2009_2_a4/

[1] Pestov G.G., Dvumerno uporyadochennye polya, Tomsk, 2003

[2] Pestov G.G., Fomina E.A., “O secheniyakh v baze 2-uporyadochennogo polya”, Vestnik TGU, 2007, no. 301, 94–96