Henry Rich Reveals J with Threads J9.4
The Array Cast
Is the Inverse of the Square a Superset of the Computational Under?
There is an intersection that I call invertible under. So if V is a strictly invertible function, you can always undo it exactly. But computational under also does some stuff like square sum and square root. In J, we can emulate structural under.
Array Cast - March 3, 2023
Show Notes
Thanks to Bob Therriault and Adám Brudzewsky for gathering these links:
[01] 00:01:26 Technium podcast https://www.youtube.com/watch?v=SUzMb5PdGBM
[02] 00:03:42 Canadian Aboriginal Syllabics https://en.wikipedia.org/wiki/Canadian_Aboriginal_syllabics
[03] 00:04:20 Newest APL Show episode: https://apl.show/2023/02/24/Primitives-Extravaganza.html
[04] 00:04:40 Under: https://mlochbaum.github.io/BQN/doc/under.html
Henry Rich Episode 6 https://www.arraycast.com/episodes/episode-06-henry-richs-deep-dive-into-j
Henry Rich Episode 18 https://www.arraycast.com/episodes/episode18-henry-rich-presents-j903
[05] 00:12:30 Amend J adverb https://code.jsoftware.com/wiki/Vocabulary/curlyrt#dyadic
At Operator Dyalog https://apl.wiki/At
[06] 00:16:20 History of J releases https://code.jsoftware.com/wiki/System/ReleaseNotes
Winget https://learn.microsoft.com/en-us/windows/package-manager/winget/
J9.4.1 https://code.jsoftware.com/wiki/System/Installation#J9.4_release
[07] 00:18:39 u t. https://code.jsoftware.com/wiki/Vocabulary/tdot
[08] 00:22:00 Matrix Multiplication https://en.wikipedia.org/wiki/Matrix_multiplication
Matrix Division https://en.wikipedia.org/wiki/Invertible_matrix
LAPACK https://en.wikipedia.org/wiki/LAPACK
[09] 00:29:40 Pyx https://code.jsoftware.com/wiki/Vocabulary/Glossary#Pyx
[10] 00:33:00 CPU Cache https://en.wikipedia.org/wiki/CPU_cache
[11] 00:36:22 Immutable objects https://en.wikipedia.org/wiki/Immutable_object
[12] 00:43:15 Dyalog Primitive for running OS threads: https://docs.dyalog.com/latest/Parallel%20Language%20Features.pdf#page=11
Dyalog Primitive for running green threads: https://apl.wiki/Spawn
[13] 00:46:20 Futex https://en.wikipedia.org/wiki/Futex
Mutex https://en.wikipedia.org/wiki/Mutex
[14] 00:53:18 GMP library https://en.wikipedia.org/wiki/GNU_Multiple_Precision_Arithmetic_Library
Fourier Transform Multiplication https://en.wikipedia.org/wiki/Convolution_theorem
[15] 00:55:05 New Error Messages https://github.com/jsoftware/dev_eformat
Hook in J https://code.jsoftware.com/wiki/Vocabulary/hook
Fork In J https://code.jsoftware.com/wiki/Vocabulary/fork
[16] 01:05:25 John Daintree Token Debugging https://dyalog.tv/Dyalog22/?v=b2at0Sa8v3E
Bob's Visual Debugger https://www.youtube.com/watch?v=iSpJxv1BUhI
[17] 01:07:00 J's new u/..: https://code.jsoftware.com/wiki/Vocabulary/slashdot#dyadic
Dyalog's Key: https://apl.wiki/Key
[18] 01:11:40 J9.4.1 Release Notes https://code.jsoftware.com/wiki/System/ReleaseNotes/J9.4
J9.4.1 link https://code.jsoftware.com/wiki/System/Installation/J9.4
[19] 01:16:29 JQt style editing https://code.jsoftware.com/wiki/Guides/Qt_IDE/Configure/Styles
[20] 01:17:08 BQNPad https://bqnpad.mechanize.systems/
[21] 01:18:10 Romilly Cocking "Solution by successive iteration" https://www.arraycast.com/episodes/episode34-romilly-cocking
[22] 01:21:38 J Playground https://jsoftware.github.io/j-playground/bin/html2/
[23] 01:23:12 Contact AT ArrayCast DOT Com
[24] 01:23:35 J Fold Conjunction https://code.jsoftware.com/wiki/Vocabulary/fcap
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