# Self-adjoint operator/Related Articles

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*See also changes related to Self-adjoint operator, or pages that link to Self-adjoint operator or to this page or whose text contains "Self-adjoint operator".*

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- Adjoint (operator theory) [r]: The adjoint of an operator
*A*is the operator*A** satisfying ⟨*u*,*Av*⟩ = ⟨*A***u*,*v*⟩.^{[e]} - Energy (science) [r]: A measurable physical quantity of a system which can be expressed in joules (the metric unit for a quantity of energy) or other measurement units such as ergs, calories, watt-hours or Btu.
^{[e]} - Hermitian operator [r]: linear operator on an inner product space that is equal to its Hermitian adjoint; also called self-adjoint operator.
^{[e]} - Hilbert space [r]: A complete inner product space.
^{[e]} - Molecular Hamiltonian [r]: Quantum mechanical operator describing the energy associated with motions and interactions of the electrons and nuclei that constitute a molecule.
^{[e]} - Quantum mechanics [r]: An important branch of physics dealing with the behavior of matter and energy at very small scales.
^{[e]} - Trace (mathematics) [r]: Sum of diagonal elements of matrix; for linear operator
*T*, the trace is*Σ*⟨_{k}*v*|_{k}*T*|*v*⟩ where {_{k}*v*} is an orthonormal basis._{k}^{[e]}