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Haskell2013–2014
ekmett / ad

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Automatic Differentiation

2Distinct people
2Mentions
1Explicit recommenders
390GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Automatic Differentiation

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

You might be interested in Edward Kmett's automatic differentiation[0] package, ad[1]. It is one of my favorite non-trivial blendings of computer science techniques and more…

chas used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by month2 dated mentions

Observed mentions: 2013-03-28 18:56:35 UTC to 2014-03-31 04:44:44 UTC.

012013-03-01 00:00:00 UTC to 2013-04-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsMar 20132013-04-01 00:00:00 UTC to 2013-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2013-05-01 00:00:00 UTC to 2013-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2013-06-01 00:00:00 UTC to 2013-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2013-07-01 00:00:00 UTC to 2013-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2013-08-01 00:00:00 UTC to 2013-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2013-09-01 00:00:00 UTC to 2013-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsSep 20132013-10-01 00:00:00 UTC to 2013-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2013-11-01 00:00:00 UTC to 2013-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2013-12-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2014-01-01 00:00:00 UTC to 2014-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2014-02-01 00:00:00 UTC to 2014-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2014-03-01 00:00:00 UTC to 2014-04-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsMar 2014

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
Mar 20132013-03-01 00:00:00 UTC2013-04-01 00:00:00 UTC101
Apr 20132013-04-01 00:00:00 UTC2013-05-01 00:00:00 UTC000
May 20132013-05-01 00:00:00 UTC2013-06-01 00:00:00 UTC000
Jun 20132013-06-01 00:00:00 UTC2013-07-01 00:00:00 UTC000
Jul 20132013-07-01 00:00:00 UTC2013-08-01 00:00:00 UTC000
Aug 20132013-08-01 00:00:00 UTC2013-09-01 00:00:00 UTC000
Sep 20132013-09-01 00:00:00 UTC2013-10-01 00:00:00 UTC000
Oct 20132013-10-01 00:00:00 UTC2013-11-01 00:00:00 UTC000
Nov 20132013-11-01 00:00:00 UTC2013-12-01 00:00:00 UTC000
Dec 20132013-12-01 00:00:00 UTC2014-01-01 00:00:00 UTC000
Jan 20142014-01-01 00:00:00 UTC2014-02-01 00:00:00 UTC000
Feb 20142014-02-01 00:00:00 UTC2014-03-01 00:00:00 UTC000
Mar 20142014-03-01 00:00:00 UTC2014-04-01 00:00:00 UTC101

What Hacker News says

2 sources
chas·Mar 31, 2014Recommendation phrase
You might be interested in Edward Kmett's automatic differentiation[0] package, ad[1]. It is one of my favorite non-trivial blendings of computer science techniques and more traditional mathematics. In specific, it uses Haskell's type system to prevent subtle numerical errors which other automatic differentiation libraries require the user to prevent by being very careful. The resulting code is much more trustworthy. [0] http://en.wikipedia.org/wiki/Automatic_differentiation [1] https://github.com/ekmett/ad/
In Univalent Foundations: New Foundations of Mathematics [video]
the answer is: it depends! Shoot me an email at Wellposed and I can try to better answer your question. I am quite literally building a full data analysis stack (as a product) in haskell, some parts of which will be available as a sort of proprietary augmented version of the haskell platform, and some parts are / will be open source. I do think that there are compelling reasons to consider Haskell / GHC for analytical workloads, but depending on the details it really depends. The principal cliff is just the HUGE number of (mostly poorly designed) libraries for many standard analyses written in R. Theres some nice engineering approaches to circumvent this, and theres some really exciting libs that a uniquely awesome and handy in haskell land. A notable example is AD, a really easy to use auto differentiation lib by Edward Kmett, which has
Read the rest
a really exciting refactor thats nearly done that will make it useable by mortal Haskellers :) http://hackage.haskell.org/package/ad and https://github.com/ekmett/ad (I've some neat bits i'll be hopefully adding to AD myself in the next month)
In R, the master troll of statistical languages (2012)

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