[Haskell-cafe] Automated Differentiation of Matrices (again)

Florian Hofmann fhofmann at techfak.uni-bielefeld.de
Wed May 20 09:55:52 UTC 2015

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


2015-05-12 0:29 GMT+02:00 adam vogt <vogt.adam at 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 at 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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