Quartic Functional Equation: Ulam-Type Stability in <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <mfenced open="(" close=")" separators="|"> <mrow> <mi>β</mi> <mo>,</mo> <mi>p</mi> </mrow> </mfenced> </math>-Banach Space and Non-Archimedean <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2"> <mi>β</mi> </math>-Normed Space
Journal of mathematics