KnowraIdentity matrixLinked fromLinked fromThe 21 pages that link to Identity matrix, each with the reason it gives.All 21Broader topic 3Related 14Narrower topic 1Compared with 3Identity elementCompared with: Matrix multiplication can also have one-sided identities in restricted settings, unlike the usual square-matrix identity.Pauli matricesCompared with: It completes the Pauli matrices to a basis for all 2×2 complex matrices but is not traceless.Permutation matrixCompared with: It is the permutation matrix for the permutation that leaves every index fixed.