A commuting tuple of symmetric and isometric operators admits a commuting self-adjoint and unitary extension when a conjugation symmetry and technical domain conditions hold, yielding a multidimensional power-trigonometric moment theorem.
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On extensions of commuting tuples of symmetric and isometric operators
A commuting tuple of symmetric and isometric operators admits a commuting self-adjoint and unitary extension when a conjugation symmetry and technical domain conditions hold, yielding a multidimensional power-trigonometric moment theorem.