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    STUDIA MATHEMATICA - Issue no. 1 / 2005  
         
  Article:   PROJECTORS AND HALL π-SUBGROUPS IN FINITE π-SOLVABLE GROUPS.

Authors:  RODICA COVACI.
 
       
         
  Abstract:  Let π be a set of primes and X be a π-closed Schunck class with the P property. The paper gives conditions with respect to which an X-projector H of a finite π-solvable group G is an Hall π-subgroup of G, and consequently we have that NG(NG(H)) = NG(H).  
         
     
         
         
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