The authors prove existence and stability of coupled best proximity points for p-cyclic contractions, but the uniqueness proof contains a logical contradiction.
Gupta, Ulam-Hyers stability theorem by tripled fixed point theo rem, Fasc
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On coupled best proximity points and Ulam-Hyers stability
The authors prove existence and stability of coupled best proximity points for p-cyclic contractions, but the uniqueness proof contains a logical contradiction.