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Christian Lawson-Perfect

@christianp@mathstodon.xyz
mastodon 4.7.2
  • Open on mathstodon.xyz

Mathematician, koala fan, mathstodon.xyz admin,
⅓ of https://aperiodical.com. He/him

0 Followers
0 Following
50 Posts
Joined April 12, 2017
Homepage:
http://somethingorotherwhatever.com
Location:
Whitley Bay, UK
Pronouns:
he/him
Favourite number:
3435
Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 4mo ago

Hello, I'm from the campaign to launch the word "learnings" directly into the sun. Do you have time for a quick chat about what we're trying to achieve?

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

The accessibility checklist for academic conferences and events that I had a hand in producing now has its own proper address, not under my staff webspace:

https://accessible-events.ncl.ac.uk/

If you work at a university and you're planning any sort of gathering of people, please have a look at it. It contains practical advice about how to make sure people of all sorts are included and able to take part in your event.

#accessibility

accessible-events.ncl.ac.uk
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

Least satisfying sequence in the whole #OEIS? https://oeis.org/A395145

mathstodon.xyz

Mathstodon

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

I've come up with another sequence that I can't believe isn't in the #OEIS (#ICBINIOEIS)!

1, 3, 7, 11, 16, 25, ...

Can you guess the next term? Can you guess the general rule?

I haven't done one of these for a while, but the usual rules apply:

* You can ask for hints. Say if you want a big, medium or small hint.
* Put any guesses under a content warning.
* If nobody correctly guesses it, I'll post the answer in a week or so.

mathstodon.xyz

Mathstodon

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

yeesss, the power!!!

We got our electric car yesterday, so it's plugged into a normal 3-pin plug now to charge up.

This is my power supply chart: 3kW is going to the car and the washing machine, 1kW to the grid, and 3.3 charging the house battery.

I'd noticed that the solar panels had capped out at around 6.2 kW before we got the car, and I wondered if the limit was in how much we can export to the grid or in the wiring from the panels. Looks like the limit was just grom the grid!

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 3mo ago
Replying to
@weirdestate@aus.social I think I have a complete picture of the people who lived here. Of course the kitchen hasn't been done since the 80s. These people don't cook!
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

Dreamt I opened an absolute monarchy-themed gym called "Honi sweat qui mal y pense".

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

We have a banner!

#BeachSpectres

mathstodon.xyz
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

I feel this would appeal to @standupmaths@mathstodon.xyz: ISBN-10 numbers with the same check digit upon conversion to ISBN-13.
https://oeis.org/A393653
#OEIS

oeis.org
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@sam@social.coop @mair@mathstodon.xyz is this the thread for bike-carrying photos?
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@robinhouston@mathstodon.xyz let's say that was the reason I didn't pursue a research career: no chance of putting my name on things
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

Exciting scenes at the maker space: found smoke billowing out of the laser cutter, and nobody else around. Seems the extractor fan gave up.
Now surrounded by technicians with hoovers.

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

Entering my "I promise this makes sense" era.

#BeachSpectres

mathstodon.xyz
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 4mo ago
Replying to
@yakmacker@society.kalli.st thanks for volunteering to be the pilot
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

What's the line between Google saying in 1998 "we could try throwing lots of commodity hardware at this big problem", and AI companies now buying up the entire computer supply chain?

Like, are the AI companies a sudden jump in ambition, or has it been increasing gradually? Were there any big supply chain crunches like this earlier in computing history?

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
a happy hello to the man in the enormous land rover who almost didn't see me (196cm, bright orange coat and bright green bike) while driving into the surgery car park.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

I've woken up to dozens of emails saying
someone's bought my "keep calm and multiply" matrix t-shirt - https://www.redbubble.com/shop/ap/37572142

What's that about? Has someone mentioned it in a video?

redbubble.com
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

All this lovely sunshine and the DNO for my solar panels still hasn't come through so they're not making me any money ☹️

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@misty @giflian the TV I bought last year has TiVo software in it and a TiVo button on the remote. It was never even really a thing in this country, so I don't know how that happened.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 2mo ago
Replying to
oh phewwwwww, the only problem was that the layout of the boot partition has changed - most stuff is in /boot/firmware now, instead of just /boot. It looks like it's booted up into the right thing, so I don't need to start completely from scratch again!
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@mjd@mathstodon.xyz @robinhouston@mathstodon.xyz aha, I see this is not sir's first rodeo
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@Scmbradley my one tip for sweet-smelling perspiration is these undies from West Africa. In brief - honey sweat key: Mali pants.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

Sound of 2026 https://www.youtube.com/watch?v=9YBPxz8AYME

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 4mo ago
Replying to
@brentsimmons@indieweb.social 😲
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@robinhouston@mathstodon.xyz it does, and I think that's what I would expect. What's interesting about it to you?
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

I just saw a Lumo train with a progress pride flag on the side, but the triangle bit on the left had a black circle on it. What does that mean?

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@mjd@mathstodon.xyz @robinhouston@mathstodon.xyz in practice, when asking this way you often get people with non-transitive preferences, e.g. they prefer B to A, and C to B, but also prefer A to C.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago

I can buy 15 90cm bamboo canes for £4, or 10 180cm canes for £5.50.

Relevant information: I own something that can cut bamboo canes.

What to do?!?! 🤔

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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@kityates@mas.to Morrismen! Why does it always have to be morrismen?
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
The accessibility guide for De Morgan House (https://www.lms.ac.uk/sites/default/files/inline-files/Accessibility%20Guide%20-%20DMH_London%20Mathematical%20Society.pdf) is so confusing. It confused me last time I looked at it, and I'm no wiser this time. It says there are raised and lower ground floor entrances, both with steps leading to them. But inside, there's an accessible toilet, a platform lift, and the guide goes into great deal about manoeuvring space and desk clearance. So they're expecting someone to be in there with a wheelchair. How? Bring your own ramp? There's no evac chair either, so I guess you have to hope you're not there the day it burns down. Can someone who's been to De Morgan House put me out of my misery?
lms.ac.uk
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@robinhouston wow, there's a phrase!
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@bremner it's "full cup the size of an almost full cup" day already?
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@metagrrrl that's a good point, and I'll add it, but here in the UK I think the fight is completely lost. The government never took air quality seriously and told institutions to stop things like air filtering and encouraging masking very early.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@marcprecipice is that stuff on the side laser cut, or a decal? I'm so jealous!
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@weekend_editor hopefully it won't take as long for us! They did say there was a backlog, but I am impatient.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@markgritter you've got a(7) and a(8) right, but I think for a completely wrong reason
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@Taneb I mean, if we're on that tack, lots of questions come first: do I want my life to be easy, does money hold any meaning for me, am I competent and of sound mind?
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@jonmsterling this isn't my scene - what's the French brainrot?
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Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@owenbiesel thanks!
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Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@skewray fortunately, the system here in the UK seems much more straightforward.
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Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@Volkershochschule about 100
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@0x10f oh wow, I have no memory of that!
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Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@womble we sort of wrote this with the UK, and specifically Newcastle, in mind, but we can add that as a point. In the UK, requiring in-person attednance can exclude people who can't get visas in time / cheaply / at all.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@micke @Volkershochschule doesn't really matter - they're going in the sand and having pointers attached to them. They just need to stick a bit above the surface.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 5mo ago
Replying to
@micke @Volkershochschule oh rats, now I see I've written 10 180cm canes. It was 15.
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Open post
Christian Lawson-Perfect @christianp@mathstodon.xyz
· 4mo ago
Replying to
@bleuje@mathstodon.xyz are there Hamiltonian cycles with more interesting symmetry than others? (I haven't thought about this in detail)
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