[Numeric] HMatrix collaboration

dominic at steinitz.org dominic at steinitz.org
Mon Jul 6 14:06:07 UTC 2020

Hi Huw,

You are right. I have given you access to the hmatrix repo. We don’t currently have any modus operandi for the organisation in which this repo lives. I assume that we will all create branches for review before merging?

I’ve cc’d the somewhat unused mailing list. If that doesn’t work for e.g. Q&A then we can try something else.

Dominic Steinitz
dominic at steinitz.org
Twitter: @idontgetoutmuch

> On 6 Jul 2020, at 08:09, Huw Campbell <huw.campbell at gmail.com> wrote:
> Hi Dominic,
> Thanks very much. I still can't seem to push to the hmatrix repository, I think the permissions are separate to the haskell-numerics organisation.
> Is there a mailing list or unofficial list of email addresses we can use for questions and change proposals? Some questions (like, why is CSR 1 indexed?) feel a bit strange for an issue tracker.
> Regards,
> Huw
> On Sat, Jul 4, 2020 at 5:56 PM <dominic at steinitz.org <mailto:dominic at steinitz.org>> wrote:
> Hi Huw
> Great 😁
> I am just about to go out but some thoughts
> Roman Cheplyaka has updated hmatrix-sundials to use sparse matrices - I have an application for this solving some PDEs which I have yet to try.
> I think Henning Thielemann has also done some work on sparse matrices / bindings to BLAS / LAPACK.
> The collaborative effort to improve random number generation worked really well - hopefully we can repeat the experience in this important area.
> Dominic Steinitz
> dominic at steinitz.org <mailto:dominic at steinitz.org>
> http://idontgetoutmuch.org <http://idontgetoutmuch.org/>
> Twitter: @idontgetoutmuch
>> On 4 Jul 2020, at 05:05, Huw Campbell <huw.campbell at gmail.com <mailto:huw.campbell at gmail.com>> wrote:
>> Hi Dominic,
>> I've been thinking about putting some more work into hmatrix for a few
>> years now, ever since I used it effectively in my neural network
>> library Grenade.
>> I currently have a few PRs up to fix and speed up sparse matrix creation.
>> I would like to really tighten up its benchmark and test suites (bring
>> them into the packages themselves instead of hosting them in an
>> external package; remove the poorly conceived `Testable` type class;
>> using criterion a lot more; and possibly porting tests to hedgehog).
>> Other items on the cards are using im2col to speed up convolutions (I
>> have this working in Grenade already) and make them easier to use with
>> user defined padding and stride.
>> It's quite a bit to do, so I was wondering if I could become a collaborator?
>> In terms of Haskell projects I maintain, the main open source one
>> these days is optparse-applicative, which I've been incrementally
>> improving over the past 5 years.
>> Kind regards,
>> Huw

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