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RowVector issue #24590 #26992

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RowVector issue #24590 #26992

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1afdee2
RowVector issue #24590
May 5, 2018
0b09fc2
Reviewed changes for dot.
alexandrebrilhante Jun 14, 2018
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4 changes: 4 additions & 0 deletions stdlib/LinearAlgebra/src/rowvector.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -60,3 +60,7 @@ struct RowVector{T,V<:AbstractVector} <: AbstractMatrix{T}
end
end
const ConjRowVector{T,CV<:ConjVector} = RowVector{T,CV}

# Issue #24590: an inner product on a vector space induces an inner product on the dual space.
dot(x::Transpose{<:AbstractVector{<:Number}}, y::Transpose{<:AbstractVector{<:Number}}) = dot(transpose(x), transpose(y))
dot(x::Adjoint{<:AbstractVector{<:Number}}, y::Adjoint{<:AbstractVector{<:Number}}) = dot(adjoint(y), adjoint(x)) # note order (y,x): this is to get the correct conjugation
8 changes: 8 additions & 0 deletions stdlib/LinearAlgebra/test/adjtrans.jl
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Expand Up @@ -460,4 +460,12 @@ end
@test B == A .* A'
end

@testset "Issue #24590" begin
for T in (Transpose, Adjoint)
@test dot(T([1, 2, 3, 4]), T([2, 3, 6, 10])) == 66
@test dot(T([1, 2, 3, 4]), (1+2im)*T([2, 3, 6, 10])) == (1+2im)*66
@test dot((1+2im)*T([1, 2, 3, 4]), T([2, 3, 6, 10])) == (1-2im)*66
end
end

end # module TestAdjointTranspose