A new pyramid-like shape always lands the same side up

(www.quantamagazine.org)

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ColinWright ◴[26 Jun 25 09:23 UTC] No.44385633[source]▶

The paper says:

"What did appear as a challenge, though, was a physical realization of such an object. The second author built a model (now lost) from lead foil and finely-split bamboo, which appeared to tumble sequentially from one face, through two others, to its final resting position."

I have that model ... Bob Dawson and I built it together while we were at Cambridge. Probably I should contact him.

The paper is here: https://arxiv.org/abs/2506.19244

The content in HTML is here: https://arxiv.org/html/2506.19244v1

replies(1): >>44387114 #

s4mbh4 ◴[26 Jun 25 13:14 UTC] No.44387114[source]▶

>>44385633 #

Would be awesome to see some pictures!

replies(1): >>44387459 #

ColinWright ◴[26 Jun 25 13:55 UTC] No.44387459[source]▶

>>44387114 #

I've knocked up a quick page:

https://www.solipsys.co.uk/ZimExpt/MonostableTetrahedron.htm...

replies(1): >>44387550 #

gus_massa ◴[26 Jun 25 14:04 UTC] No.44387550[source]▶

>>44387459 #

I was expecting to see the photos, but the jpg are linked there instead of visible. IIRC you were using a self-made CMS for your blog, with more support for math formulas. Does it not allow images?

replies(1): >>44387565 #

1. ColinWright ◴[26 Jun 25 14:05 UTC] No.44387565[source]▶

>>44387550 #

Everyone complains about how crap my website is, so in this case I've just exported a page from my internal zim-wiki. Yes, it can have photos, but it doesn't give any control over sizing or positioning, so I'm providing links for people to click through to.

It's the middle of my working day and I'm in the middle of meetings, so I don't have time to do anything more right now.

replies(3): >>44387677 #>>44387987 #>>44389376 #

2. bbkane ◴[26 Jun 25 14:17 UTC] No.44387677[source]▶

>>44387565 (TP) #

Thanks for posting! I'd love a YouTube video too if you get the time later

3. jabiko ◴[26 Jun 25 14:46 UTC] No.44387987[source]▶

>>44387565 (TP) #

To be fair, I don't think there is anything wrong with clickable links instead of embedded images.

replies(1): >>44388154 #

4. SoftTalker ◴[26 Jun 25 15:06 UTC] No.44388154[source]▶

>>44387987 #

I don't mind the image links. The text weight and contrast could use some work.

5. mzs ◴[26 Jun 25 17:25 UTC] No.44389376[source]▶

>>44387565 (TP) #

Your site is fine, thank you very much, I was not able to able to save it in the internet archive though: https://web.archive.org/save/https://www.solipsys.co.uk/ZimE...

"Save Page Now could not capture this URL because it was unreachable. If the site is online, it may be blocking access from our service."

replies(1): >>44389658 #

6. ColinWright ◴[26 Jun 25 17:51 UTC] No.44389658[source]▶

>>44389376 #

Interesting ... and baffling. I've simply exported that from the zim wiki, not doing anything special, so I have no idea why the internet archive would complain about it.

And it's the other part of my site that people complain bitterly about:

https://www.solipsys.co.uk/new/ColinsBlog.html?yf26hn

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