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作者:Sumit Chandok , T.D. Narang
来源:[J].Nonlinear Analysis(IF 1.64), 2010, Vol.73 (1), pp.105-109
摘要:Abstract(#br)The ordered pair ( T , I ) of two self-maps of a metric space ( X , d ) is called a Banach operator pair if the set F ( I ) of fixed points of I is T -invariant i.e. T ( F ( I ) ) ⊆ F ( I ) . Some common fixed point theorems for a Banach operator pair and the ex...
作者:Sumit Chandok , T.D. Narang
来源:[J].Bulletin of the Belgian Mathematical Society - Simon Stevin(IF 0.316), 2011, Vol.18 (5), pp.821-834
摘要:In this paper we generalize and extend Brosowski-Meinardus typeresults on invariant points from the set of best approximation to theset of ε-simultaneous approximation. As a consequence some results onε-approximation and best approximation are also deduced. The resultsproved...
作者:T.D. Narang , Sahil Gupta
来源:[J].Annales UMCS, Mathematica, 2015, Vol.69 (1), pp.83-90
摘要:Abstract As a counterpart to best approximation, the concept of best coapproximation was introduced in normed linear spaces by C. Franchetti and M. Furi in 1972. Subsequently, this study was taken up by many researchers. In this paper, we discuss some results on the existence and...

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