Hyers–Ulam Stability Results for a Functional Inequality of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <mfenced open="(" close=")"> <mrow> <mi>s</mi> <mo>,</mo> <mi>t</mi> </mrow> </mfenced> </math>-Type in Banach Spaces
Journal of function spaces