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We introduce the class of extended simulation functions, which is more large than the class of simulation functions, recently introduced in (Khojasteh et al. Filomat 29(6):1189–1194, 2015). We obtain a $$\varphi $$ φ -admissibility result involving extended simulation functions, for a new class of mappings $$T: X\rightarrow X$$ T : X → X , with respect to a lower semi-continuous...
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