Hi Adam,

I had a look at that and from my understanding it should be compatible with the `conjugateGradientDescent` function which is fine for me.

I am not sure yet how this works out, but I'll see where I can get with this.

Thanks,

Florian

2015-05-12 0:29 GMT+02:00 adam vogt <vogt.adam@gmail.com>:

Hi Florian,

The restriction Edward described is gone: here's an unboxed vector of ForwardDouble:
<https://gist.github.com/aavogt/6bee72717148123a187c>. But I don't think there's been any work to make hmatrix's Field class have a ForwardDouble instance. I don't know of a ReverseDouble either.

Regards,
Adam

On Mon, May 11, 2015 at 6:24 AM, Florian Hofmann <fhofmann@techfak.uni-bielefeld.de> wrote:
In [1](this) email thread Edward Kmett and Dominic Steinitz discuss the state of interoperability of `ad` and `hmatric` (or `repa`) with Edward hinting that the 4.0 line of `ad` might improve on the situation.

Could someone elaborate on the state of affairs two years later?

Florian

[1]: https://mail.haskell.org/pipermail/haskell-cafe/2013-April/107561.html

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