LinearAlgebra/addmul/mul!(::Matrix{Float64}, ::LinearAlgebra.Symmetric{Float64, S} where S<:(AbstractMatrix{<:Float64}), ::LinearAlgebra.Tridiagonal{Int64, V} where V<:AbstractVector{Int64}, α, β)/α = true, β = -1.9012631735742316/adjoint and transpose/fa = identity, fb = adjoint @test returned_mat === Ccopy