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ProjectMAC
propagators
Scheme2015–2015
ProjectMAC / propagators

propagators

The propagator system

2Distinct people
3Mentions
0Explicit recommenders
43GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

The propagator system

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

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, 1:49:46 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 week3 dated mentions

Observed mentions: 2015-06-25 23:05:03 UTC to 2015-12-27 02:43:45 UTC. Weeks start Monday, UTC.

012015-06-22 00:00:00 UTC to 2015-06-29 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsJun 222015-06-29 00:00:00 UTC to 2015-07-06 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-07-06 00:00:00 UTC to 2015-07-13 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-07-13 00:00:00 UTC to 2015-07-20 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-07-20 00:00:00 UTC to 2015-07-27 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-07-27 00:00:00 UTC to 2015-08-03 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-08-03 00:00:00 UTC to 2015-08-10 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-08-10 00:00:00 UTC to 2015-08-17 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-08-17 00:00:00 UTC to 2015-08-24 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-08-24 00:00:00 UTC to 2015-08-31 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-08-31 00:00:00 UTC to 2015-09-07 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-09-07 00:00:00 UTC to 2015-09-14 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-09-14 00:00:00 UTC to 2015-09-21 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-09-21 00:00:00 UTC to 2015-09-28 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsSep 212015-09-28 00:00:00 UTC to 2015-10-05 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-10-05 00:00:00 UTC to 2015-10-12 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-10-12 00:00:00 UTC to 2015-10-19 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-10-19 00:00:00 UTC to 2015-10-26 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-10-26 00:00:00 UTC to 2015-11-02 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-11-02 00:00:00 UTC to 2015-11-09 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-11-09 00:00:00 UTC to 2015-11-16 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-11-16 00:00:00 UTC to 2015-11-23 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-11-23 00:00:00 UTC to 2015-11-30 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-11-30 00:00:00 UTC to 2015-12-07 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-12-07 00:00:00 UTC to 2015-12-14 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2015-12-14 00:00:00 UTC to 2015-12-21 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-12-21 00:00:00 UTC to 2015-12-28 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsDec 21

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
Jun 222015-06-22 00:00:00 UTC2015-06-29 00:00:00 UTC101
Jun 292015-06-29 00:00:00 UTC2015-07-06 00:00:00 UTC000
Jul 62015-07-06 00:00:00 UTC2015-07-13 00:00:00 UTC000
Jul 132015-07-13 00:00:00 UTC2015-07-20 00:00:00 UTC000
Jul 202015-07-20 00:00:00 UTC2015-07-27 00:00:00 UTC000
Jul 272015-07-27 00:00:00 UTC2015-08-03 00:00:00 UTC000
Aug 32015-08-03 00:00:00 UTC2015-08-10 00:00:00 UTC000
Aug 102015-08-10 00:00:00 UTC2015-08-17 00:00:00 UTC000
Aug 172015-08-17 00:00:00 UTC2015-08-24 00:00:00 UTC000
Aug 242015-08-24 00:00:00 UTC2015-08-31 00:00:00 UTC000
Aug 312015-08-31 00:00:00 UTC2015-09-07 00:00:00 UTC000
Sep 72015-09-07 00:00:00 UTC2015-09-14 00:00:00 UTC000
Sep 142015-09-14 00:00:00 UTC2015-09-21 00:00:00 UTC000
Sep 212015-09-21 00:00:00 UTC2015-09-28 00:00:00 UTC000
Sep 282015-09-28 00:00:00 UTC2015-10-05 00:00:00 UTC000
Oct 52015-10-05 00:00:00 UTC2015-10-12 00:00:00 UTC000
Oct 122015-10-12 00:00:00 UTC2015-10-19 00:00:00 UTC000
Oct 192015-10-19 00:00:00 UTC2015-10-26 00:00:00 UTC000
Oct 262015-10-26 00:00:00 UTC2015-11-02 00:00:00 UTC000
Nov 22015-11-02 00:00:00 UTC2015-11-09 00:00:00 UTC000
Nov 92015-11-09 00:00:00 UTC2015-11-16 00:00:00 UTC000
Nov 162015-11-16 00:00:00 UTC2015-11-23 00:00:00 UTC000
Nov 232015-11-23 00:00:00 UTC2015-11-30 00:00:00 UTC000
Nov 302015-11-30 00:00:00 UTC2015-12-07 00:00:00 UTC000
Dec 72015-12-07 00:00:00 UTC2015-12-14 00:00:00 UTC101
Dec 142015-12-14 00:00:00 UTC2015-12-21 00:00:00 UTC000
Dec 212015-12-21 00:00:00 UTC2015-12-28 00:00:00 UTC101

What Hacker News says

3 sources
Constraint-based things to check out: 1. Sussman's talk "We Really Don't Know How to Compute" (http://www.infoq.com/presentations/We-Really-Dont-Know-How-T...) and his work on the Propagator (https://github.com/ProjectMAC/propagators). 2. Gremlin Graph Traversal Machine (http://arxiv.org/pdf/1508.03843v1.pdf, http://www.datastax.com/dev/blog/the-benefits-of-the-gremlin...) 3. Clojure core.logic (https://github.com/clojure/core.logic) and core.match (https://github.com/clojure/core.match) 4. Yedalog: Exploring Knowledge at Scale (http://research.google.com/pubs/pub43462.html, https://www.youtube.com/watch?v=SP9zS43FRzQ) 5. Datomic Datalog (http://docs.datomic.com/query.html)
In Handbook of Constraint Programming (2006) [pdf]
Prof Carlsson's (http://math.stanford.edu/~gunnar/) "Topology and Data" paper provides a good overview: http://www.ams.org/journals/bull/2009-46-02/S0273-0979-09-01... My recent dive into the literature has enlightened my thinking in terms of database and systems design. It has led me to think more in terms of properties, invariants, intervals, constraints, and dynamic fluidity -- "there are no things" (only actions and properties): https://edge.org/response-detail/11514 Maybe the antiquated abstractions we have been using for database systems is what limits us. Maybe we need to stop thinking in terms of things -- objects, partitions, and static state -- and start thinking in terms of millions of fluid dynamic processes. Maybe Jim Starkey is on the right track: http://www.nuodb.com/about-us/jim-starkey. Sussman seems to be converging ther
Read the rest
e too -- see his talk "We Really Don't Know How to Compute" (http://www.infoq.com/presentations/We-Really-Dont-Know-How-T...) and his work on the Propagator (https://github.com/ProjectMAC/propagators). The rapid flow of data id stressing our system designs is making this more apparent, and we're starting to see stream processing systems emerge like Google Dataflow and Apache Flink. Ideas from functional programming and immutable state are looking more prescient. Now our database management systems need to evolve. "At no period in human culture have men understood the psychic mechanisms involved in invention and technology. Today it is the instant speed of electric information that, for the first time, permits easy recognition of the patterns and the formal contours of change and development. The entire world, past and present, now reveals itself to us like a growing plant in an enormously accelerated movie. Electric speed is synonymous with light and with the understanding of causes." — Marshal McLuhan, Understanding Media: The Extensions of Man (1964) 'okram's recent paper provides a new graph-based model for stateless functional flows that could be applied in other systems: See "Quantum Walks with Gremlin" (http://arxiv.org/pdf/1511.06278v1.pdf) And Vladimir Kornyak touches on some of these ideas in these papers: 1. On Compatibility of Discrete Relations (2005) http://arxiv.org/pdf/math-ph/0504048.pdf 2. Structural and Symmetry Analysis of Discrete Dynamical Systems (2010) http://arxiv.org/pdf/1006.1754.pdf 3. Discrete Dynamical Models: Combinatorics, Statistics and Continuum Approximations (2015) http://mmg.tversu.ru/images/publications/2015-vol3-n1/Kornya...
In Gunnar Carlsson on the Shape of Data (2012) [video]

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