Let (K,v) be a henselian valued field of arbitrary rank which is not separably closed. Let k be a subfield of K of finite codimension and be the valuation obtained by restricting v to k. We give some necessary and sufficient conditions for to be henselian. In particular, it is shown that if k is dense in its henselization, then is henselian. We deduce some well known results proved in this direction through other considerations.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm120-1-12, author = {Ramneek Khassa and Sudesh K. Khanduja}, title = {Subfields of henselian valued fields}, journal = {Colloquium Mathematicae}, volume = {120}, year = {2010}, pages = {157-163}, zbl = {1244.12003}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm120-1-12} }
Ramneek Khassa; Sudesh K. Khanduja. Subfields of henselian valued fields. Colloquium Mathematicae, Tome 120 (2010) pp. 157-163. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm120-1-12/