Search for the mythological Klein-ing Frame

This is the site and map I originally found.

CORRECTIONS
- None yet, let me know if you spot anything!

Filming by Alex Genn-Bash
Editing by Gus Melton
Written, performed and additional filming by Matt Parker
Local translation services by Dave Brooks
Attending a conference in Japan to justify the trip by Lucie Green
Produced by Nicole Jacobus
Music by Howard Carter
Design by Simon Wright and Adam Robinson

MATT PARKER: Stand-up Mathematician

[tfofurn]

The claim that you're not trapped because you're outside the surface is the funniest thing I shall hear all day. 😂

[mmorris]

It's pretty awesome that Friendly Horse Guy saw you holding your camera down and waving your hand around, and immediately KNEW what you were talking about and trying to emphasize. And then brought a long stick over to help you physically show exactly what you were trying to convey. That the entire interaction happened without any common language shared between the two of you is the best thing I've seen all week.

[Hunteriffic]

The fact that he kept that park around in honor of his mother and knows about the geometry makes me smile

[cliftonchurch]

I love how this story with your wife's friend becomes a closed loop with bit of a twist once the final research happens. How fitting for a video about Klein bottles and Mobius strips.

[TangoWolf]

Alternate title: Matt Parker doing Maths Parkour in a Park for Maths

[肉骨粉]

The pile of concrete is probably from the demolition of a building that used to be home to a tiny science museum, founded by the mother of the horse guy. The museum, which featured the park as an outdoor exhibit, had been closed for years (keeping science museums running and relevant is notoriously difficult).
Still, the organization behind the museum is keeping the spirit alive by hosting children's science workshops, even though COVID hit them hard. Here's hoping they continue the legacy.

[volodyad]

Friendly horse guy was already friendly and then even gave maths demonstration

[Chris_miller]

This is probably the best representation of “build it and they will come” I’ve ever seen.

[antonymitchell]

"I'm not technically trapped in here, I'm outside of the surface"

[paulj]

This whole story is so hartwarming. It starts with a cool playground in a corner of a horse farm, and then connects 2 math educators through time and space who turned out to be already connected. All so we get to enjoy the classic slapstick of Matt climbing a jungle gym, dunk his phone, and get stuck on the outside.

[misad]

Horse Guy is awesome. I love how Matt doesn't really speak Japanese and Horse Guy doesn't really speak english, but they both speak Math and they can communicate with that.

[SpinyBadger]

Fun fact - Klein called it a Fläche (surface). Its appearance and some mild confusion with Flasche (bottle) led to the popular name.

[timetraveller]

"I can see a Klein Bottle on the horizon", and just beyond that, the Cartesian Plain.

[RickMattison]

15:13 (so close!) When the Japanese guy pulled out the stick and put it on the saddle surface so that it was flush, it was so wholesome to me that despite Matt speaking English and the other guy spoke Japanese, they could still understand each other.

It demonstrates that mathematics can be considered a language by itself!

[magicball]

This is so surprisingly wholesome. I'm sure friendly horse guy was so happy to have people interested in his mother's old project. Most certainly made his day.

[donerskine]

I took the end of this Youtube video, twisted it over, and joined it to the beginning. Now I watch it on a continuous loop, although half the time it is upside down.

[GM-qqwi]

The fact that horse-guy was able to so easily visually demonstrate the line thing on the saddle point that you were trying to describe without translation, and then compare with an actual saddle (becuase "horse-guy"), and then to learn his mother founded the park. Is that not peak serendipity?

[dealbreakerc]

I've got to say that the Friendly Japanese Horse Guy was by far the star of the video. And a lovely example of the people of Japan being absolutely wonderful soul (especially if you are off the over tourist-ed path and are polite/respectful).

[cybershadow]

Take a close look at the mobius monkey bars at around 8:30. You can see that the mobius strip is not only non-orientable, but has only one edge. The big pipe is just one continuous pipe.

[minerharry]

Math transcends language - words cannot express how happy I felt when he brought out that stick and was like YES EXACTLY LOOK THE LINES ARE STRAIGHT!!!