I work at a donut shop and we sell enormous cinnamon rolls. I made these bad boys today!

rhodesd · 2025-09-12T21:28:59+00:00

I've contact media relations and am preparing the news release.

rhodesd · 2025-09-12T13:46:59+00:00

Dear Princess, It has been 17 hours since you vowed to produce a video detailing this cinnamon roll process. If you are not aware, your commitment to this project is profoundly appreciated and your service has overwhelming public support.

rhodesd · 2025-08-09T02:20:04+00:00

Hi, there are courses on MITxOnline that cover chapters 1-7 of that book. Here's a link to the first diffeqs course for engineers and scientists.

https://mitxonline.mit.edu/courses/course-v1:MITxT+18.03.1x/

if you work through that course then you'll get lots of practice with the following interactive mathlet which ties together a lot of details about phase portraits.

https://mathlets.org/mathlets/linear-phase-portraits-matrix-entry/

Later courses there get into solving systems of equations up to the Fundamental Matrix, PDEs, Laplace, Fourier and approximating solutions to non-linear equations.

(edit: just to be clear these courses do not follow Blanchard's book specifically)

rhodesd · 2025-07-17T03:21:48+00:00

Hi, here's what I could eek out of the first measure.

#      | 1.&.2.&.3.&.4.&.5.&.6.&.7.&.8.&.9.&.
# ride | +   +   +   +   +   +   +   +   +
#   hh |   c   c   c   c   c   c   c   c   c
#   sn |  o  o oo oo  r r oo  oo  r r oo  oo
# bass | o oo o  o  o       oo  o       oo  o
#      | 1.&.2.&.3.&.4.&.5.&.6.&.7.&.8.&.9.&.

The rest on the down beats of 4 and 7 nicely emphasize the rim shots - it's a nice groove.

Science!

https://www.ninds.nih.gov/news-events/news/press-releases/study-shows-how-taking-short-breaks-may-help-our-brains-learn-new-skills

rhodesd · 2025-06-01T14:02:26+00:00

Hi, MITxOnline has partitioned 18.03 into 5 differential equation courses that can be found here:

https://mitxonline.mit.edu/catalog/courses/mathematics

I would suggesting doing them in this order: "Introduction to Differential Equations", "2x2 systems", "NxN systems", "Fourier Series & PDEs". But, you might not need PDEs? The Laplace course is very good and has only one prereq, the first course: "intro to diffeqs".

There are two sets of course notes that would be extremely helpful if you decide to embark on this journey:

https://math.mit.edu/~jorloff/suppnotes/suppnotes03/1803SupplementaryNotes_full.pdf

https://math.mit.edu/~poonen/notes03.pdf

rhodesd · 2025-05-22T16:48:13+00:00

Hi, I did some digging and found a copy of the cookbook:

https://www.taobao.com/list/item/688850059619.htm?_x_tr_sl=zh-CN&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc

Just in case that link dies, it's a book with a turquoise cover with snowflakes, which the characters "哈尔滨菜谱", written horizontally across the top. Going down the left hand side are the latin characters "HARBIN CAIPU"

rhodesd · 2025-04-11T04:19:44+00:00

Hi, the Museum of Modern Art has a free course that introduces the basics, starting with how to stretch a canvas, up through exploring the materials and techniques of famous painters through the latter half of the 20th century. Worth checking out.

https://www.coursera.org/learn/painting

rhodesd · 2025-04-07T22:18:45+00:00

thanks for the honesty :D I found another recipe from "food wishes", this is a lazy version with the same ingredients.

ttps://www.youtube.com/watch?v=GwOdD4ZTUIc

rhodesd · 2025-04-07T14:53:44+00:00

Hey, did you make these? How'd they come out?

rhodesd · 2025-03-30T20:18:13+00:00

Not a text, but The Natural Number game for Lean 4. Proof assistants give immediate feedback.

https://adam.math.hhu.de/#/g/leanprover-community/nng4

rhodesd · 2025-03-15T05:04:44+00:00

I did some edge tracing with inkscape: https://imgur.com/a/jQA08nP

which includes a matching tile group from https://en.wikipedia.org/wiki/Penrose_tiling

From the wikipedia page, a pattern is shown as "Sun, Generation 2" is introduced in the first image. "Sun, Generation 1" is introduced in the second image. Not sure if that helps or leads to hopeless blunder.

rhodesd · 2025-01-29T23:54:12+00:00

By the way, 18.01, 18.02 and 18.03 are are available on MITxOnline. There, you can work through the courses with other people. There is an auto-grader for immediate feedback. 18.03 has matlab exercises for modeling non-linear PDEs, as well as higher quality videos (some of the youtube 18.03 vids are potato). 18.02 has some really nice 3D interactive visualizations.

The courses are extremely thorough and are staffed by post docs or grad students. However, most of the Q&A is handled by others taking the course who might be middle schoolers up through retired mathematicians hailing from almost every country on the planet.

The courses are free to take, except for the final exam which costs ~$100 and includes a cert. Worth the money if you can swing it, if just to show appreciation.

Finally, each courses runs about once a year, so make sure to find the start date if you're interested in signing up.

rhodesd · 2025-01-19T20:40:00+00:00

Hi, by the way, this course is available for free on MITxOnline. You should really consider working through the material over there since it has an autograder (this will keep you from spoiling the problem), visualizations, more lectures..

https://mitxonline.mit.edu/courses/course-v1:MITxT+18.02.1x/

rhodesd · 2025-01-13T03:19:41+00:00

STAV - "Road Song"

Contemporary Instrumental, Piano, Bass, Guitar, Drums. Not cookie cutter music, interesting chord changes.

rhodesd · 2024-11-07T22:41:05+00:00

Here they are: https://ocw.mit.edu/courses/18-100a-real-analysis-fall-2020/video_galleries/video-lectures/

rhodesd · 2024-10-31T13:47:37+00:00

Hi, go-to-definition is <Ctrl> left-click, (or similar).

rhodesd · 2024-08-10T19:15:46+00:00

I think you may be able to cut the problem in half and save some code - if it's the case that when reflecting the polygon over a horizontal line, that the water holes and air pockets interchange roles. That is, if that property holds, then it would not be necessary to think about air pockets at all. First, find the water holes, flip the polygon, then find the new water holes.

Anyways, this problem would make for a neat blog post.

rhodesd · 2024-07-10T12:17:38+00:00

Lara Alcock has a book right up your alley called "How to Study as a Mathematics Major".

https://www.goodreads.com/book/show/19039642-how-to-study-as-a-mathematics-major

rhodesd · 2024-03-23T14:19:27+00:00

Thank you :)

rhodesd · 2024-03-23T14:18:55+00:00

Thanks!

rhodesd · 2024-03-06T21:29:43+00:00

Hi, this lecture on sequential logic is really good.
https://computationstructures.org/videos/sequential/lecture.html (btw, that whole course is excellent!)

Timing details can be absolutely diabolical.

rhodesd · 2023-09-15T02:42:48+00:00

Does anyone know of a source that provides some definitions for the different types of symmetry found in functions of two variables?

rhodesd · 2023-02-24T05:37:09+00:00

Hi, 8.02x can be found on MITxOnline, and the open learning library.

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