Statistics kernels?

[Moelf]

We have sum but not mean and var which exist in GPUArrays.jl, are they in-scope for this project?

In addition, what about Combinatorics.jl (like combination and permutations)

[anicusan]

Sure, mean and var would be very easy to add and similar in scope to sum.
Wouldn't the Combinatorics.jl work as iterators to pass to e.g. foreachindex? I haven't tested it, but we could make sure within Combinatorics.jl that they are GPU-able - is there anything else we'd need on the AK side?

[Moelf]

good to know, right now looking at JuliaGPU/GPUArrays.jl#611 and wonder if AK.jl can provide a more locked-down version of mean and var and actually be useful