E-learning app selection multi-criteria group decision-making problem using Einstein operator in linguistic trapezoidal neutrosophic environment

In this article, we have defined linguistic trapezoidal neutrosophic numbers (LTNNs) which are a combination of trapezoidal neutrosophic numbers and linguistic variable numbers. Then, we introduced the Einstein sum, product and exponentiation operations for LTNNs and discussed the relationship among these operations. Moreover, two new kinds of aggregation operators, namely Einstein weighted-average operator and Einstein weighted-geometric operator for LTNNs, have been constructed. Based on the above aggregation operators, a multi-criteria group decision-making technique has been designed, which is demonstrated through numerical examples. Finally, sensitivity analysis and comparative study have been accomplished to exhibit the effectiveness and feasibility of the newly developed technique in the linguistic environment.