activatedgeek / activatedgeek/svgd

Bug in SVGD.phi()?

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Hi,

I was reading your code, svgd/Stein.ipynb notebook in particular. I've noticed that in `SVGD.phi()` function, you have `grad_K = -autograd.grad(K_XX.sum(), X)[0]`. Is this correct? In my understanding, `phi()` is supposed to compute the equation right above and there is no minus sign there. Could you take a look?

Thanks,
Cagatay.

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