iiinova — where your digital self keeps evolving

Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 16/10/2026

yesss, one of the heaters has reached its target temp and turned off, and the battery is full, so it's now exporting to the grid and making me delicious pennies!

A chart showing the battery is full, 5.974 kW coming in from the solar panels, 3.144 kW going out to the grid, and 2.857 kW used by appliances.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 01/10/2026

This Water Sort level drove me mad! I've been stuck on it since yesterday, and since my PC is spending hours doing a distro upgrade, I decided to try brute forcing it with a python script. The solution it found takes 65 moves 😭 "Relaxing colour-sorting […] [Original post on mathstodon.xyz]

Screenshot of Water Sort level 30, showing 14 containers, filled with different symbols. I can transcribe the symbols if you really want me to.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 23/09/2026

Interesting collection of symbols on my Octopus energy statement. Do you think that £41.39 is going to me, or to Octopus? The line below is definitely in my favour - it's the amount for electricity exported from my solar panels.

Credit on your account. Reversed account charge: +£-41.39. Electricity: +£208.63.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 22/09/2026

Aperiodic monotiles, in the Geobunnies style. Mathematics is hugely improved by the addition of a face, ears, and a little fluffy tail.

The Spectre and hat aperiodic monotiles, in bright colours, with a rabbit's face, ears and tail drawn on.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 20/09/2026

This is the bit of #Beamish museum that makes me the most nostalgic 😔

A plaque reading "scheme partly financed by the European regional development fund"

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 18/09/2026

Just realised that I've lapped my page-a-day block of note paper from last year.

The top page says Friday 12th September 2025

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 15/09/2026

Today's #3dprinting fix: replaced a broken bit of the bracket for my bike lock.

A bracket attached to a handlebar ona cargo bike. One side of the bracket is the original black plastic; the other half is a replacement printed in bright PLA

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 14/09/2026

After getting fed up with geogebra and polypad, I've finally taken the time to make myself a little thing for placing polygon tiles. It picks the closest edge to the point you've clicked on, and places a tile lined up with that edge. My idea (artist's […] [Original post on mathstodon.xyz]

Lots of regular polygons from triangles to nonagons, placed sort of randomly but all touching. The polygons are colourful and the background is plain white.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 09/09/2026

Microsoft Bookings is having a little rave 🥳 🤟

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 05/09/2026

[Food] Pretty pleased with this year's effort for the second-born. Can you guess what the party theme is? #baking #cake

Looking down on a rectangular cake topped with squares in different colours, and smarties pressed into them to look like climbing holds. Two playmobil children are climbing, suspended by threads from the top of the cake. On the left hand side are two pigeons and a love heart, made of colourful icing.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 03/09/2026

Fortunately, I've been using computers long enough not to be put off by this nonsensical collection of words.

Studio blog: Android Studio Rabbit 1 Canary 3 now available

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 13/08/2026

Basically, I want the PC this guy would have built

Isambard Kingdom Brunel, a Victorian man wearing a suit and top hat, stood in front of some absolutely massive chains

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 09/08/2026

Ahh, so that's where the remainder goes when I round down!

Satellite view of a ditch labelled "Division Drain"

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 22/07/2026

[picture of bad food] I was browsing my photo archives and had a panic that I couldn't find my big road trip to France and Spain on the map. Turns out I did it before GPS-tagged photos were a thing. Anyway, here's one lowlight of the trip: the Pizza Texas […] [Original post on mathstodon.xyz]

A pizza with three whole steak hâché (like quarter pounder beef burgers) on top. For le goût de Monsieur, some olives are sprinkled around the edge.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 02/07/2026

An hour-long digression later, I now have a tool to search for unicode characters by semantic similarity. I'm using emoji/unicode characters as placeholder icons for a user interface, so I've been struggling to use a combination of literal search on character […] [Original post on mathstodon.xyz]

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 23/06/2026

The electricians have sent me a USB stick "handover pack" with all the documentation to do with the stuff they installed. There's something weird about the subdirectory names in one particular directory: they all end with character U+F028, which is in the […] [Original post on mathstodon.xyz]

Three folders: "Aifo 475", "EP11" and "H1-6.0", all of which have a dot rendered just under the bottom-left of the last character.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 18/06/2026

No, *you* spent half an hour making a Geordie generator to demo a new @numbas feature

Here's your Geordie character sheet: Name: Paul Air. Home: Wallsend. Hobbies: Jigsaws, Football. Skills: Drinking broon ale, 2. Singing "fog on the Tyne", 3. Wearing short sleeves year-round, 3. Canny: why aye!

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 14/06/2026

Found this lovely butterfly or moth struggling on our patio. It looked like it was in the wars. Can anyone identify it?

A butterfly (or moth) with mainly white wings, with black spots and a bit of yellow. Its body is yellow with black spots.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 11/06/2026

Standard "oh yeah I should take a photo of the tyne bridges oh no it's almost too late" shot.

The bottom half of the photo is train tracks, blurred by speed. Some electrical boxes are whooshing into view. Behind all that is the river Tyne and some of the bridges over it.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 08/06/2026

I'm sorting through the #BeachSpectres photos. This one's a nice desktop background.

A close-up of a colourful Spectre monotile stamper lying on the sand, with another upside-down one behind it.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 08/06/2026

I love to read a paper with a "come get me" plea for collaborators at the end: (this is arxiv.org/abs/2406.16402)

Hence, the wanted result will follows if we can prove the following result (a similar result have been proven for rhombus tilings in [1]):
Conjecture 1 If T ≠ T′ are two tilings of the same region, then there is a triangle in T that can be moved by a flip towards its elevation in T′, so that no triangle which has already at the same elevation in T and T′ is moved.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 06/06/2026

#BeachSpectres day 1 went really well. I heard that we might have completed 100 level-metatiles, which would be around 800-900 tiles stamped in the sand. The unusually gloomy weather didn't get us down. Same again tomorrow!

A couple of dozen people stood around a large area of sand stamped with Spectre tiles.

Selfie with me and Max Hughes looking at the camera, and the Spectre tiling in the middle of shot with people spots around it.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 05/06/2026

I dreamt that somebody had invented a scheme where QR codes were encoded as hexadecimal strings, to save space? somehow??? Each 2×2 block in the QR code is converted to a hexadecimal digit, reading the bits left to right, top to bottom […] [Original post on mathstodon.xyz]

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 03/06/2026

Doing a stupid online work training. (important topic, stupid presentation) I've got all the accessibility options turned on. Which answers are green?

Well done! That's correct. The correct answers are those in green below. Then a grid of eight answers, some of which have different background shading.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 31/05/2026

I could never bear to get rid of my lego train from 1992. I'm so pleased we could put it back together, and it still works! The 5-year-old has had a lovely time driving it back and forth.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 06/05/2026

"Let's film the Spanish City to establish the location." ... and then to remove any remaining doubt about where we were, someone goes past in a Newcastle Brown Ale cycling top!

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 06/05/2026

Lay down number bars 1, 2, 3, ... Put the bar as far to the left as you can, as high as you can: if you can stack on top of previous bars, then do so. The first 25 bars look like the attached image. The sequence is the lengths of the leftmost bar on each row […] [Original post on mathstodon.xyz]

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 01/05/2026

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 […] [Original post on mathstodon.xyz]

A 3-column stacked bar chart. The left column show the battery at 86%. The middle column shows 7.2kW in from the solar panels. The right column shows 1kW out to the grid, 2.9kW to mains appliances, and 3.3kW charging the battery.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 29/04/2026

My GP's surgery, promoting active travel. I had to move the goalposts so I could get to the bit I lock my bike to.

A bike stand with a curving roof. Waste boxes are piled high on one side, and a large set of metal goalposts has been pushed to the other side. My bike is standing awkwardly between them.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 22/04/2026

This is the button you press to get in to the building.

A big button labelled "press to exit", mounted on a outside wall

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 20/04/2026

@Edent I realised recently that emoji are valid CSS class names, which meant I didn't have to make separate class name strings for a chart with elements labelled by emoji. So it definitely is useful!

A snippet of CSS, with selectors for classes ☀️, 🔋, and ⚡.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 17/04/2026

I had an intrusive thought about making a text adventure using a dataset of UK towns: uk-the-text-adventure.think.somethi…

An interface rendered in monospace text.

The United Kingdom of Great Britain and Northern Ireland: the Text Adventure

You are in Newcastle upon Tyne.
> look
You are in Newcastle upon Tyne. To the North is Edinburgh. To the East is South Shields. To the South is Gateshead. To the West is Carlisle.

Enter a command: (input box)

made by clp.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 16/04/2026

I've got the paints out! A crucial part of #BeachSpectres will be working out where to put the tiles. We're going to use the substitution system, which means we have to imagine a lathe metatile before breaking it down to eventually get to a single Spectre tile […] [Original post on mathstodon.xyz]

Looking down at a big piece of paper with a patch of Spectre tiling - 72 Spectres - imprinted on it in black paint. A plate covered in black paint, a Spectre stamper and a bottle of paint are in the bottom right corner.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 14/04/2026

Professionals call this a wibbly-wobbly mathsy-wathsy diagram. (from orca.cardiff.ac.uk/id/eprint/182750)

$A square commutative diagram with expressions at each corner made up of a combination of inline fractions and superscripts that make each row look like a wavy line.$

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 02/04/2026

A work email led me to a video about a school in China which includes a montage of clips from different lessons. This one caught my eye: there's pinyin written on the blackboard. I didn't think pinyin was useful for native Chinese speakers unless you're […] [Original post on mathstodon.xyz]

A teacher stands in front of a blackboard with the character 盛 to the left of a brace, with 'chéng' and 'śhèng' written on the right. Above is written 文言文二则.

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 01/04/2026

Who do I complain to about the fact the MathsWorld UK website's background is a repeating faux-Penrose pattern?

A pattern made of the rhombuses used in the Penrose tiling, but it's actually the same small square repeated several times. At each vertical repeat, there are a couple of edges that end without meeting another edge.

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