Joseph Nebus @nebusj@mathstodon.xyz
- Me on WordPress
- https://nebusresearch.wordpress.com
I read comic strips and write about the mathematics in them. He/him. Black Lives Matter.
New followers always welcome; no need to ask. All-ages account; I'm old enough to remember Skylab falling, myself.
Joined Jan 2019
Joseph Nebus
boosted
we had a little more success making something function in the abc coordinates instead of using the park transform but then we end up with a lot of trouble with a huge long expression for torque and we're not certain whether we should use inductances of Ls or 3/2*Ls, and whether the coupling should be -0.5 or -1/3
-F
Joseph Nebus
boosted
Is anyone here good at physical modelling, because we're having a heck of a time getting a working model of a PMSM in LTspice
would be until monday before we can work on it much more but would appreciate tips on avoiding convergence issues, understanding what the correct numbers to put in off a real motor's datasheet are, and figuring out what the hell is going on that sometimes the model just decides every node is at 1e+26 volts
-F
I at last reached the end of my 2021 A-to-Z, with Zorn's Lemma:
https://nebusresearch.wordpress.com/2022/03/09/my-little-2021-mathematics-a-to-z-zorns-lemma/
I can't say what I'll do next, except it's probably sharing Pi Day themed comic strips.
And for the penultimate letter of this small yet difficult project, O, for Ordinary Differential Equations:
I did finally resume the Little 2021 Mathematics A-to-Z, after a pause necessitated by life being all too much. For the third-to-last letter, it's another T, Tangent Space:
https://nebusresearch.wordpress.com/2022/02/23/my-little-2021-mathematics-a-to-z-tangent-space/
Joseph Nebus
boosted
Happy new year! If you're the kind of person that other people ask "is there anything mathematical about this number?", you might find this useful: a 78-page collection of maths facts about 2022, by Inder J Taneja
https://zenodo.org/record/5805264#.YdA2aoinwSZ
Pondering how my mother could e-mail me a screenshot of the picture on her phone, instead of just the picture she wanted me to see.
Emblematic of how much I'm falling behind on things: here's the latest essay in my Little 2021 Mathematics A-to-Z, for a third letter A, Atlas:
https://nebusresearch.wordpress.com/2021/12/15/my-little-2021-mathematics-a-to-z-atlas/
The project's on a hiatus right now while I deal with ... just ... you know ... *everything*.
I'm falling behind on myself again. For the letter 'S', and finishing off my spelling of the word 'Mathematics', it's Subtraction:
https://nebusresearch.wordpress.com/2021/12/08/my-little-2021-mathematics-a-to-z-subtraction/
And for the letter 'C', I wrote about 'convex':
https://nebusresearch.wordpress.com/2021/12/01/my-little-2021-mathematics-a-to-z-convex/
And I'm appealing for suggestions for the last couple topics seen as I hope not to miss deadline for the letter 'C' this week:
For the letter 'I' in my Mathematics A-to-Z, it's the Inverse:
https://nebusresearch.wordpress.com/2021/11/24/my-little-2021-mathematics-a-to-z-inverse/
Last week's essay, the second 'T' in Mathematics A-to-Z, was about the Triangle:
https://nebusresearch.wordpress.com/2021/11/17/my-little-2021-mathematics-a-to-z-triangle/
Joseph Nebus
boosted
reverse a string? you mean... put it back... into the keyboard?
- Me on WordPress
- https://nebusresearch.wordpress.com
I read comic strips and write about the mathematics in them. He/him. Black Lives Matter.
New followers always welcome; no need to ask. All-ages account; I'm old enough to remember Skylab falling, myself.
Joined Jan 2019
