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    • Algebraic theory of atkinson operators 

      Heuser, Harro
      Notations: In this paper E denotes a linear space, δ(E) the set of all endomorphisms  of E , L(E) the set of all continuous endomorphisms of E if E is equipped with a vector  space topology.  If  T ∈δ (E),  then         ...
      Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de Matemáticas.