Browsing by Author "Jafari, Saeid"

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    Fuzzy Stability in the Sense of Hyers-Ulam of a Functional Equation on Quadratic Forms
    (Taru Publications, 2023) Farahani, Moahmmad Reza; Valdes, Juan E. Napoles; Cancan, Murat; Jafari, Saeid
    We obtain a general solution of the 2-variable quadratic functional equation zeta(y(1) + y(2), y(3) + y(4)) + zeta(y(1)-y(2), y(3)-y(4)) = 2 zeta(y(1), y(3)) + 2 zeta(y(2), y(4)) and discuss the stability of the above functional equation, while the quadratic form zeta(a, b) = alpha a(2) + beta ab + gamma c(2) is a solution of our functional equation.