Common fixed point and invariant approximation results

다국어 초록 (Multilingual Abstract)

Necessary conditions for the existence of common xed pointsfor noncommuting mappings satisfying generalized contractive conditionsin the setup of certain metrizable topological vector spaces are obtained.As applications, related results on best approximation are derived. Ourresults extend, generalize and unify various known results in the litera-ture.

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