LinearAlgebra/addmul/mul!(::Matrix{ComplexF64}, ::LinearAlgebra.Diagonal{ComplexF64, V} where V<:AbstractVector{ComplexF64}, ::LinearAlgebra.SymTridiagonal{Int64, V} where V<:AbstractVector{Int64}, α, β)/α = 0.5736993469939383 - 0.5802973672015239im, β = 0.5736993469939383 - 0.5802973672015239im/adjoint and transpose/fa = identity, fb = adjoint @test ≈(collect(returned_mat), exp_val, rtol = rtol, atol = atol)