Now showing items 1-1 of 1

    • Symmetric perturbation of a self-adjoint operator 

      Rao, Duggirala K.
      We give a proof, which is valid in both real and complex Hilbert spaces, of the following  result: If A is self-adjoint, B is symmetric D(B)  ⊃ D(A), || Bx|| and lt; a ||x|| + ||Ax|| for x∈ D(A),  then  A+bB is self-adjoint ...
      Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de Matemáticas.