Observations on relation-theoretic coincidence theorems under Boyd–Wong type nonlinear contractions
Observations on relation-theoretic coincidence theorems under Boyd–Wong type nonlinear contractions
In this article, we carry out some observations on existing metrical coincidence theorems of Karapinar et al. (Fixed Point Theory Appl. 2014:92, 2014) and Erhan et al. (J. Inequal. Appl. 2015:52, 2015) proved for Lakshmikantham–Ćirić-type nonlinear contractions involving $(f,g)$ -closed transitive sets after proving some coincidence theorems satisfying Boyd–Wong-type nonlinear …