I couldn't resist this after my cholfact() revelation...

On Wednesday, November 5, 2014 11:23:03 AM UTC+1, Stefan Karpinski wrote:
>
> Well, I'm not sure what the intention was, but this fact is true: for 
> floating-point values x and y of the same type, x == y is true if and only 
> if string(x) == string(y).
>
>
julia> a = inv(eye(2))

2x2 Array{Float64,2}:

 1.0  -0.0

 0.0   1.0

julia> a[1,2] == a[2,1]

true

julia> string(a[1,2]) == string(a[2,1])

false
(pardon the formatting, I don't seem to have a good handle on this in 
google groups)

Cheers, 

---david

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