[julia-users] pinv(0) != pinv([0])

[Rasmus Brandt]

Hey everyone, 

I just stumbled over this behaviour in Julia-0.3.7, which seems a bit 
unintuitive to me:

julia> pinv(0)
Inf

julia> pinv([0])
1x1 Array{Float64,2}:
 0.0

In Matlab R2012a I get:

>> pinv(0)

ans =

     0

It seems that the definition
pinv(x::Number) = one(x)/x
satisfies the Moore-Penrose conditions for all x != 0.

Is this intentional, or a bug?

-- Rasmus