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

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 R-h, the henselisation of R as local ring, and (v) over tilde, 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. (C) 2020 Published by Elsevier Inc.