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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect
@christianp.mathstodon.xyz.ap.brid.gy
81 followers 3 following 560 posts
Mathematician, koala fan, mathstodon.xyz admin, ⅓ of https://aperiodical.com. He/him [bridged from https://mathstodon.xyz/@christianp on the fediverse by https://fed.brid.gy/ ]
aperiodical.com.
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 4h
@drmakimber @ColinTheMathmo I'm wary of Trainline, because I'd rather avoid middlemen if possible. But maybe I should look.
I'm happy with ending up with lots of separate tickets, I just want to be on specific trains instead of "get me from A to B however"
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 4h
@ColinTheMathmo I need your train ticket advice!
The boy and I want to have a train adventure day, taking as many different trains as possible up to Edinburgh.
I've found a specific set of trains. Is there a more efficient way of booking the ticekts than going through the order form on […]
Original post on mathstodon.xyz
mathstodon.xyz
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 1d
Uh oh, they're letting me use the laser cutter.
A small wooden lasercut spectre monotile held in my hand.
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 1d
I came across this great app called Aubin, "an autism friendly travel companion".

http://aubin.app/

The main purpose is it's a journey planner.

You can tell it things like how much you prefer different kinds of transport, how much time you want to wait at a station, whether you'd prefer a […]
Original post on mathstodon.xyz
mathstodon.xyz
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Reposted by Christian Lawson-Perfect
slothrop.chaos.social.ap.brid.gy
Rocketman @slothrop.chaos.social.ap.brid.gy · 2d
OH:

"Bist du morgen im Büro?"

"Nee, ich kann nicht. Muss arbeiten."
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Reposted by Christian Lawson-Perfect
christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 2d
New video by me: What on earth is the infinite least squares beanstalk?

https://www.youtube.com/watch?v=3Y-Q4fXHc9U
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 1d
Wow, I've just encountered the HTML element: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/base
It's useful!
<base>: The Document Base URL element - HTML | MDN
The HTML element specifies the base URL to use for all relative URLs in a document. There can be only one element in a document.
developer.mozilla.org
christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 2d
This is now A389415: https://oeis.org/A389415
A389415 - OEIS
oeis.org
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 2d
I shouldn't be allowed to use Blender.
A sandcastle in the shape of a spectre monotile, with a spectre-shaped flag flying from the top.
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 2d
@robinhouston I looked at a few ActivityPub video/livestreaming services, trying to self-host one, but couldn't make anything work.

I wonder if what I actually want is to just put videos on my blog.
christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 2d
@robinhouston I think it's going to take a few hours to transcode. It's letting me play the original video, but maybe it won't for you.
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 2d
Or on the PeerTube instance I managed to get an account on: https://cuddly.tube/w/bZjygCuZiavsPK5QLwB2t2
What on earth is the infinite least squares beanstalk?
"The infinite trunk of least squares beanstalk" is A276573 on the OEIS: https://oeis.org/A276573
cuddly.tube
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 2d
New video by me: What on earth is the infinite least squares beanstalk?

https://www.youtube.com/watch?v=3Y-Q4fXHc9U
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 3d
Yeah, go on then:

"men's": https://aperiodical.teemill.com/product/vacuous-truth-is-the-best-kind-of-truth/

"women's": https://aperiodical.teemill.com/product/vacuous-truth-is-the-best-kind-of-truth-womens-relaxed-fit/
Vacuous truth is the best kind of truth (\"men's\" fit)
A vacuous truth is a conditional or universal statement that is true because the antecedent cannot be satisfied. For example, "every person at the Hen...
aperiodical.teemill.com
christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 3d
Me all weekend: "why have no #oeis editors commented on my draft sequence?"

Me just now: *notices the button ""these edits are ready for review"*
christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 3d
T-shirt idea: Henry the Hoover saying "Vacuous truth is the best kind of truth"
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Reposted by Christian Lawson-Perfect
chip-unicorn.im-in.space.ap.brid.gy
Chip Unicorn @chip-unicorn.im-in.space.ap.brid.gy · 4d
I have a question for mathematicians out there...

Start with a square 100 km on a side.

An inhabitant of this square has two ways to travel: walking, which can be done from any point to any point at a pace $p_w$ seconds per kilometer, or going by a train which needs laid-down tracks but goes […]
Original post on im-in.space
im-in.space
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 5d
Right, that's the push to prod done. Now the weekend!
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 6d
@bencurthoys phew!
christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 6d
@bencurthoys it is?!
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 6d
Example A: the deck is in order 1 2 3. This is what happens:

1 2 3
2 3 1 (1 card to the back)
1 2 3 (2 cards to the back)
Win!

Example B: the deck is in order 1 3 2.

1 3 2
3 2 1 (1 card to the back)
3 2 1 (3 cards to the back)
Infinite loop: lose!

Example C: the deck is in order 2 1 4 3.

2 […]
Original post on mathstodon.xyz
mathstodon.xyz
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 6d
I've just come up with a sequence I can't believe isn't in the #oeis (#icbinioeis)!

Take cards labelled 1 ... N. Shuffle them.

Repeat this procedure: look at the top card's value, X. Move X cards from the top of the deck to the back, one at a time.

If you ever end up back at your first card […]
Original post on mathstodon.xyz
mathstodon.xyz
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 7d
@SvenGeier I love your optimism
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 7d
Big boo and bah to the Boots pharmacy order form, which says that a hyphen is an invalid character in a surname.
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christianp.mathstodon.xyz.ap.brid.gy
Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 8d
I've had a nice time writing this question on logic gates for a colleague: https://numbas.mathcentre.ac.uk/question/181020/fill-in-a-truth-table-corresponding-to-a-circuit-d/preview/
Fill in a truth table corresponding to a circuit diagram - preview - Numbas at mathcentre.ac.uk
numbas.mathcentre.ac.uk
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