Abstract We prove that the set GP of all nonzero generalized pentagonal numbers is an additive uniqueness set; if a multiplicative function f satisfies the equation f ( a +… Click to show full abstract
Abstract We prove that the set GP of all nonzero generalized pentagonal numbers is an additive uniqueness set; if a multiplicative function f satisfies the equation f ( a + b ) = f ( a ) + f ( b ) , for all a , b ∈ G P , then f is the identity function.
               
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