Simplicity, primitivity and semiprimitivity of etale groupoid algebras   with applications to inverse semigroup algebras
  This paper studies simplicity, primitivity and semiprimitivity of algebras associated to \'etale groupoids. Applications to inverse semigroup algebras are presented. The results also recover the semiprimitivity of Leavitt path algebras and can be used to recover the known primitivity criterion for Leavitt path algebras. 
Benjamin Steinberg
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