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    STUDIA MATHEMATICA - Issue no. 1 / 2015  
         
  Article:   A-WHITEHEAD GROUPS.

Authors:  .
 
       
         
  Abstract:  This paper investigates various extensions of the notion of Whitehead modules. An Abelian group G is an A-Whitehead group if there exists an exact sequence 0 → U → ⨁IA → G→ 0 such that SA(U) = U with respect to which A is injective. We investigate the structure of A-Whitehead groups.
Mathematics Subject Classification (2010): 20K20, 20K40.
Keywords: Whitehead modules, endomorphism rings, adjoint functors.
 
         
     
         
         
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