Christian Lawson-Perfect @christianp@mathstodon.xyz
- Homepage
- http://somethingorotherwhatever.com
- Location
- Newcastle upon Tyne, UK
- Pronouns
- he/him
- Favourite number
- 3435
Admin
Mathematician, koala fan, mathstodon.xyz admin,
⅓ of https://aperiodical.com. He/him
Joined Apr 2017
Pinned toot
Christian Lawson-Perfect
boosted
@christianp I propose this be called a lullaby sequence.
This sequence is now in the OEIS: http://oeis.org/A343934
(spoilers!)
I chant integer sequences as lullabies. Soporific for baby, brain exercise for me.
Here's a sequence that I came up with for this afternoon's nap:
1,2,3,2,4,5,4,6,4,7,6,4,8,9,8,10,8,11,10,8,12,8,13,12,8,14,12,8,15,14,12,8,16,17,16,18,16,19,18,16,20,16,21,20,16…
What's next?
Christian Lawson-Perfect
boosted
Just in time for #StarWarsDay, a new 3D printed puzzle. Use the 4th (dimension) to solve it!
Video: youtu.be/LG5HUd0hzzo
"I listen to whatever's on the radio" : Decimal.
"Oh cool, you like this too": Binary.
"You might not have heard of it": Hexadecimal.
"I accompany her overtone singing with my hand-carved lute": HEPTAVINTIMAL
The baby has just expelled so much gas that I'm worried about his core temperature
accessibility griping
Someone mentioned the Diagram Center's Poet site as a good place to learn how to do image descriptions.
So I was surprised to see a thumbnail of a flow chart describing the process, linking to a bigger JPG file, whose alt text isn't particularly helpful: "decision_tree_flow_chart_thumb"
Christian Lawson-Perfect
boosted
Recently, I've tried a kind of interactive expert system by using ccg2lambda. If we input some premises and a goal, the system produce some subgoals, and I want to transform that subgoals to readable sentences for human, and then have tried to prove it interactively.
Christian Lawson-Perfect
boosted
Good morning! My name is Colin and I am a mathematician. What can I help you with this week?
Christian Lawson-Perfect
boosted
UK bin designs - https://govbins.uk/
Cheeky little dodecahedron made out of a loo roll tube.
Christian Lawson-Perfect
boosted
New entry!
The fluid mechanics of poohsticks
Article by Julyan H. E. Cartwright and Oreste Piro
In collections: Attention-grabbing titles, Basically physics, Modelling
2019 is the bicentenary of George Gabriel Stokes, who in 1851 described the drag - Stokes drag - on a body moving immersed in a fluid, and 2020 is the centenary of Christopher Robin Milne, for whom the game of poohsticks was invented; his...
URL: http://arxiv.org/abs/2104.03056v1
PDF: http://arxiv.org/pdf/2104.03056v1
Entry: https://read.somethingorotherwhatever.com/entry/Thefluidmechanicsofpoohsticks
Christian Lawson-Perfect
boosted
New entry!
The best known packings of equal circles in a square
Web page by Eckard Specht
In collections: Geometry, Lists and catalogues
URL: http://hydra.nat.uni-magdeburg.de/packing/csq/csq.html
Entry: https://read.somethingorotherwhatever.com/entry/Thebestknownpackingsofequalcirclesinasquare
Christian Lawson-Perfect
boosted
Related, very exciting: a full Jupyter notebook including #Python and Numpy and math libs running *entirely* in browser—no server.
https://github.com/jtpio/jupyterlite
They compiled the Python runtime plus and Numpy and FORTRAN libs to #WebAssembly. It all runs in your browser.
This is kind of the opposite route from Gitpod, whom you go to to reduce the burden of server config and management. With things like #JupyterLite, you minimize build/config problems *and* keep your computers.
I remember seeing a map of the world (or just Europe?) showing the standard form of the equation of a straight line in different countries.
I can't think what to put into google to find it again. Can anyone help me?
Here's a thing: while writing a document about decolonising our curriculum, Word's "Editor" feature popped up. It gave me a low spelling score because of...
all the foreign names it didn't know!
What a great example to include.
Christian Lawson-Perfect
boosted
@christianp I did not know about that, but I did know about the uncircled older "CIƆ" numeral instead of M for 1000. One of the theories about the origin of the \(\infty\) symbol is that it came from this numeral.
Who knew about this Roman numeral for ten thousand? ↂ
And apparently there's one for a hundred thousand too: ↈ
Here's something I've thought about for approximately twelve seconds:
How useless is the group \( \langle a,b \mid a^2 = b^2 = (ab)^3 = 1 \rangle\)? It's, like, almost ℤ₃, but with halfway points.
The international conference on e-assessment in mathematical sciences is taking place online 21st June to 2nd July this year.
It's free, the schedule is relaxed, and there will be some great talks.
Registration is now open: https://eams.ncl.ac.uk
- Homepage
- http://somethingorotherwhatever.com
- Location
- Newcastle upon Tyne, UK
- Pronouns
- he/him
- Favourite number
- 3435
Admin
Mathematician, koala fan, mathstodon.xyz admin,
⅓ of https://aperiodical.com. He/him
Joined Apr 2017
