by allending on 9/30/21, 8:11 AM with 42 comments
by ivan_ah on 9/30/21, 10:37 AM
I like how the author sets up a "grammar of matrix multiplications," and then reuses the same patterns in the rest of the document.
For people who might not be familiar, these visual notes are inspired by and complement Prof. Strang's new book https://math.mit.edu/~gs/everyone/ and course https://ocw.mit.edu/resources/res-18-010-a-2020-vision-of-li... https://www.youtube.com/playlist?list=PLUl4u3cNGP61iQEFiWLE2... see also https://news.ycombinator.com/item?id=23157827
by jasode on 9/30/21, 9:26 AM
by antegamisou on 9/30/21, 12:15 PM
https://youtube.com/playlist?list=PLZHQObOWTQDPD3MizzM2xVFit...
by ChicagoBoy11 on 9/30/21, 6:34 PM
by hiranabe on 10/1/21, 6:08 AM
This article should have been titled as "Graphic Notes on Linear Algebra for Everyone", and Prof. Strang kindly suggested this big name. I was lucky that this drew this attention.
There are some other visuals I'm trying around the area. - Eigenvalues https://anagileway.com/2021/10/01/map-of-eigenvalues/
-Matrix classification https://anagileway.com/2020/09/29/matrix-world-in-linear-alg...
When I was an undergraduate, I didn't get this understanding of linear algebra... but after watching all the Prof. Strang's 18.06 classes in MIT OpenCourseWare, now I have much clear view of this area... So I really appreciate his way of teaching.
BTW, I even made a T-shirt and sent him ! https://anagileway.com/2020/06/04/prof-gilbert-strang-linear...
by skytreader on 9/30/21, 10:52 AM
In undergrad, my mnemonic for these operations was visualizing the matrices animated in my head. The more complex ones, it was actually easier for me to remember Scheme functions that represent the algorithm (all expressed via higher-order functions so it was pretty concise); this was unique to my circumstances as an undergrad, not something I can pull off today without reviewing a lot of material.
Presenting the operations with color and blocks just gives a more natural "user interface" (lacking a better term) for remembering it!
by amelius on 9/30/21, 10:56 AM
Also, they say "rank 1 matrix", but they haven't defined the concept of rank yet.
Some readers might find this kind of presentation acceptable, but personally I strongly dislike it when concepts are used before they are defined.
by visarga on 9/30/21, 9:47 AM
by hwers on 9/30/21, 12:16 PM
by jnurmine on 9/30/21, 9:14 PM
by _wldu on 9/30/21, 11:18 AM
by Matt-Gleich on 9/30/21, 7:09 PM
by tishha on 9/30/21, 12:11 PM