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mentat-collective
emmy
Clojure2023–2024
mentat-collective / emmy

emmy

The Emmy Computer Algebra System.

6Distinct people
8Mentions
0Explicit recommenders
499GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

The Emmy Computer Algebra 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, 5:04:57 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 month8 dated mentions

Observed mentions: 2023-01-27 12:41:36 UTC to 2024-03-05 20:12:41 UTC.

0122023-01-01 00:00:00 UTC to 2023-02-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 commentsJan 20232023-02-01 00:00:00 UTC to 2023-03-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-03-01 00:00:00 UTC to 2023-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-04-01 00:00:00 UTC to 2023-05-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-05-01 00:00:00 UTC to 2023-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-06-01 00:00:00 UTC to 2023-07-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-07-01 00:00:00 UTC to 2023-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-08-01 00:00:00 UTC to 2023-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsAug 20232023-09-01 00:00:00 UTC to 2023-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-10-01 00:00:00 UTC to 2023-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-11-01 00:00:00 UTC to 2023-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-12-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2024-01-01 00:00:00 UTC to 2024-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-02-01 00:00:00 UTC to 2024-03-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments2024-03-01 00:00:00 UTC to 2024-04-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 commentsMar 2024

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
Jan 20232023-01-01 00:00:00 UTC2023-02-01 00:00:00 UTC110
Feb 20232023-02-01 00:00:00 UTC2023-03-01 00:00:00 UTC101
Mar 20232023-03-01 00:00:00 UTC2023-04-01 00:00:00 UTC000
Apr 20232023-04-01 00:00:00 UTC2023-05-01 00:00:00 UTC101
May 20232023-05-01 00:00:00 UTC2023-06-01 00:00:00 UTC000
Jun 20232023-06-01 00:00:00 UTC2023-07-01 00:00:00 UTC101
Jul 20232023-07-01 00:00:00 UTC2023-08-01 00:00:00 UTC000
Aug 20232023-08-01 00:00:00 UTC2023-09-01 00:00:00 UTC000
Sep 20232023-09-01 00:00:00 UTC2023-10-01 00:00:00 UTC000
Oct 20232023-10-01 00:00:00 UTC2023-11-01 00:00:00 UTC000
Nov 20232023-11-01 00:00:00 UTC2023-12-01 00:00:00 UTC000
Dec 20232023-12-01 00:00:00 UTC2024-01-01 00:00:00 UTC101
Jan 20242024-01-01 00:00:00 UTC2024-02-01 00:00:00 UTC000
Feb 20242024-02-01 00:00:00 UTC2024-03-01 00:00:00 UTC211
Mar 20242024-03-01 00:00:00 UTC2024-04-01 00:00:00 UTC110

What Hacker News says

8 sources
ehaveman·Mar 5, 2024Submission

Ask HN: Any interactive math tutorials that use a computational algebra system?

I'm a senior level programmer who recently became interested in furthering my math education. I also just became aware of computational algebra systems like emmy: https://github.com/mentat-collective/emmy My question is: is there an interactive math curriculum/textbook/etc that uses such a system to teach the math? I would find that a lot more engaging than learning math the old way!
1 points · Open discussion
> static typing helps everywhere I think "Structure and Interpretation of Classical Mechanics" is a good example of the kind of software a dynamically-typed Lisp is superior at, beyond the usual suspects like SQL, R, Python, etc. Here's an example of SICM in Clojure: https://github.com/mentat-collective/emmy Go here to give it a try: https://nextjournal.com/try/samritchie/sicmutils And here's a conference talk about it's implementation: https://www.youtube.com/watch?v=7PoajCqNKpg --- More broadly, I think Rich Hickey (Clojure creator) makes a reasonable case that for information processing systems in particular, static typing has negative value: https://www.youtube.com/watch?v=2V1FtfBDsLU That's also been my experience.
In Why is Jepsen written in Clojure?
> You can get a feel for how unergonomic this is by avoiding the use of all arithmetic operators in your code and instead forcing yourself to use user defined plus(a,b), minus(a,b), assign(a,b), etc, or programming directly with the C blas api. You've dramatically overstated your case, since that's true of every Lisp-like language. Lisp is a perfectly suitable language for developing mathematics in, see SICM [0] for details. If you want to see SICM in action, the Emmy Computer Algebra System [1] [2] [3] [4] is a Clojure project that ported SICM to both Clojure and Clerk notebooks (like Jupyter notebooks, but better for programmers). [0] https://mitpress.mit.edu/9780262028967/structure-and-interpr... [1] Emmy project: https://emmy.mentat.org/ [2] Emmy source code: https://github.com/mentat-collective/emmy [3] Emmy implementation talk (201
Read the rest
7): "Physics in Clojure" https://www.youtube.com/watch?v=7PoajCqNKpg [4] Emmy notebooks talk (2023): "Emmy: Moldable Physics and Lispy Microworlds": https://www.youtube.com/watch?v=B9kqD8vBuwU
In Zig is hard but worth it
Better yet, keep proper definitions and equations and then drive interesting animations from "real deal" code! I've been working for a couple of years on a computer algebra system written in Clojure (named "Emmy") designed for writing this like. It's a port of Gerald Sussman's scmutils library, plugged in to a bunch of modern graphics libraries. Here are a few examples, shamefully lacking exposition since much of this is JUST working and I was powering through demos for a talk: - particle in a quartic potential well: https://sritchie.github.io/clojure-conj-2023/notebooks/conj/... - Phase Portrait of the Pendulum: https://sritchie.github.io/clojure-conj-2023/notebooks/conj/... - Colin's torus geodesics: https://sritchie.github.io/clojure-conj-2023/notebooks/conj/... - Taylor Series https://sritchie.github.io/clojure-conj-2023/notebooks/con
Read the rest
j/... - (p, q) torus knot: https://sritchie.github.io/clojure-conj-2023/notebooks/conj/... - Dual Number Visualization: https://sritchie.github.io/clojure-conj-2023/notebooks/conj/... I'd love a textbook like the one you link above with figures that feel almost like Kerbal games, powered by the real code in the book that is ALSO generating the math you see. See https://github.com/mentat-collective/emmy for more information if this is interesting.
In Orbital Mechanics
Here's some Clojure code I wrote for the Emmy computer algebra system that implements polynomial interpolation with a few different algorithms described in Numerical Recipes: https://github.com/mentat-collective/emmy/blob/main/src/emmy... I discovered while writing this that I could express each of these algorithms as folds that consumed a stream of points, accumulating a progressively higher order polynomial. Here's the same sort of thing but for rational function interpolation: https://github.com/mentat-collective/emmy/blob/main/src/emmy...
In Polynomial interpolation

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