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STABILITY OF PEXIDERIZED FOUR-VARIABLE FUNCTIONAL EQUATIONS: A FIXED POINT APPROACH
2017
Far East Journal of Mathematical Sciences (FJMS)
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In this paper, we investigate the superstability problem for the pexiderized cosine functional equations f ( . Consequently, we have generalized the results of stability for the cosine(d'Alembert) and the Wilson functional equations by
doi:10.17654/ms102081745
fatcat:ketwhfwlt5avxojfwn2653k4fq