Relation-theoretic metrical coincidence and common fixed point theorems under nonlinear contractions Md Ahmadullah | Mohammad Imdad | Mohammad Arif | Show more Md Ahmadullah India Aligarh Muslim University Department of Mathematics Mohammad Imdad India Aligarh Muslim University Department of Mathematics Mohammad Arif India Aligarh Muslim University Department of Mathematics Submitted: 2017-05-14 | Accepted: 2017-09-18 | Published: 2018-04-02 DOI: https://doi.org/10.4995/agt.2018.7677