[JuliaLang/LinearAlgebra.jl] ishermitian(::Diagonal) is wrong for non-real matrices (#175)

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Jiahao Chen

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Nov 26, 2024, 6:21:40 AM11/26/24

to JuliaLang/LinearAlgebra.jl, Julia Backports, Mention

Currently ishermitian(::Diagonal) is defined to be true always, but this is wrong when the entries have nonzero nonreal components.

julia> D=Diagonal([Complex(0.0,1.0)])
1x1 Base.LinAlg.Diagonal{Complex{Float64}}:
 0.0+1.0im

julia> ishermitian(D)
true

julia> D'
1x1 Base.LinAlg.Diagonal{Complex{Float64}}:
 0.0-1.0im

julia> D'==D
false

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