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In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Keywords: Soft set Rough set Soft rough set MSR-set MSR-approximation space a b s t r(More)
Soft S-acts are defined over S-acts. Some properties of soft S-acts are discussed. Soft subact of a soft S-act over an S-act may not be a soft S-act over the S-act. $$\left( \alpha,\beta \right) $$ -fuzzy S-acts are defined and characterized by soft S-acts. Fuzzy subacts with thresholds of an S-act are defined and characterized by soft S-acts. Finally,(More)