Stability and Instability of Multiplicative Inverse Type Tredecic and Quottuordecic Functional Equations in Non-archimedean Spaces

This chapter deals with the investigation of validity of various fundamental stabilities of multiplicative inverse type tredecic and quottuordecic functional equations relevant to Ulam stability theory in non-Archimedean fields via fixed point method. Two suitable counter-examples are also included to prove that the stability results are not valid for singular cases.