Two and three shared sets uniqueness problem on restricted and unrestricted ordered meromorphic functions

TL;DR

This paper investigates the uniqueness of two meromorphic functions sharing two sets under certain restrictions, removing order constraints from previous results and providing examples to illustrate the necessity of conditions.

Contribution

It extends prior uniqueness theorems by removing order restrictions and introduces new conditions for shared sets of meromorphic functions.

Findings

Removed order restrictions in shared sets uniqueness theorems

Provided examples demonstrating the necessity of conditions

Improved upon previous results in shared sets uniqueness

Abstract

In this paper we have mainly focused on the uniqueness of two meromorphic functions under the realm of two shared sets problem with certain restrictions which in turn improve the results of { P. Sahoo and H. Karmakar, Uniqueness theorems related to weighted sharing of two sets, Acta Univ. Sapientiae, Mathematica, 10(2) (2018), 329-339} and {P. Sahoo and A. Sarkar, On the uniqueness of meromorphic functions sharing two sets, Bol. Soc. Mat. Mex., (2019), 1-7}. In particular, pointing out some gaps in the statements of the results in { P. Sahoo and H. Karmakar, Uniqueness theorems related to weighted sharing of two sets, Acta Univ. Sapientiae, Mathematica, 10(2) (2018), 329-339} and {P. Sahoo and A. Sarkar, On the uniqueness of meromorphic functions sharing two sets, Bol. Soc. Mat. Mex., (2019), 1-7}. we have removed the order restrictions on the main results in { P. Sahoo and H. Karmakar, Uniqueness theorems related to weighted sharing of two sets, Acta Univ. Sapientiae, Mathematica, 10(2) (2018), 329-339} and {P. Sahoo and A. Sarkar, On the uniqueness of meromorphic functions sharing two sets, Bol. Soc. Mat. Mex., (2019), 1-7} at the cost of sharing of an additional singleton. A number of examples have been provided by us to show some conditions in our results are essential.