IEVref: 102-06-28 ID: Language: en Status: Standard Term: unitary matrix Synonym1: Synonym2: Synonym3: Symbol: Definition: regular square matrix A with complex elements for which the inverse A−1 is equal to the Hermitian conjugate matrix AHNote 1 to entry: For a unitary matrix with elements Aij: $\sum _{i}{A}_{ij}{A}_{ik}^{*}={\delta }_{jk}$ and $\sum _{k}{A}_{ik}{A}_{jk}^{*}={\delta }_{ij}$ where ${\delta }_{jk}$ and ${\delta }_{ij}$ are Kronecker deltas. Note 2 to entry: Any orthogonal matrix with real elements is a unitary matrix. Publication date: 2008-08 Source: Replaces: Internal notes: 2017-02-20: Editorial revisions in accordance with the information provided in C00019 (IEV 102) - evaluation. JGO 2017-08-25: Corrected order of I and sub tags. LMO CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: