On a theorem by de Felipe and Teissier about the comparison of two henselisations in the non-Noetherian case


On a theorem by de Felipe and Teissier about the comparison of two henselisations in the non-Noetherian case (pdf) arxiv 2008.12502
with M-E. Alonso and S. Neuwirth.
Journal of Algebra. 570, (2021), 587--594.

Abstract : Let R be a local domain, v a valuation of its quotient field centred in R at its maximal ideal. We investigate the relationship between the henselisation of R as local ring, and the henselisation of the valuation v, by focussing on the recent result by de Felipe and Teissier referred to in the title. We give a new proof that simplifies the original one by using purely algebraic arguments. This proof is moreover constructive in the sense of Bishop and previous work of the authors, and allows us to obtain as a by-product a (slight) generalisation of the theorem by de Felipe and Teissier.