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The man with 1,000 klein bottles under his house [video]

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Re: The man with 1,000 klein bottles under his house [video]

#51

His tiny robotic warehouse in the crawlspace of his house is the coolest thing I've seen in a long time. Pure distilled mad science. He's like a living cartoon. I want to be him when I get old so very much!

He is a true "hacker", I was very impressed with his robot made from various junk parts

Re: The man with 1,000 klein bottles under his house [video]

#52

Earlier quoted context omitted.

If you stick a cork in the bottom, his bottles have an inside and an outside. The abstract object doesn't, the 3d manifestation of it does.

I had to think about what that meant for a moment, as it's sort of part of the weirdness of the bottle. Really, putting a cork in it is probably closer to putting a lid on a bowl, no? It's just sealing the local minimum. (Maximum? I don't really know what the sign should be for this. Probably maximum, for enclosed volume, since I'm not sure if it's reasonable to talk about the topology having a minimum in this contex…

If I needed to close one, I'd stick a cork in the hole in the bottom. So I think that is a reasonable way to describe closing it.

I don't think I can reason clearly about the 4 dimensional object, part of pointing out that a 3d manifestation does not have the same properties is me trying to do that.

Re: The man with 1,000 klein bottles under his house [video]

#55
post #43

Earlier quoted context omitted.

But with an ordinary bottle, the edge is the point (if I may), because if a bottle had no edge, couldn't it be said that has just one ordinary surface? So in fact, what I understand so far is: - a (hollow) sphere has two surfaces, one inside and one outside, and you can't connect one to the other (you can't walk from one to the other) - a potato, or a bowl also have the same properties: two distinct surfaces - a bott…

I think the confusion here is that you're taking what he's saying in terms other than those of topology. In topology, you deal with manifolds. Manifolds have no thickness , but they do have area. In topology, there's no such thing as a 'filled' sphere: a sphere in topology has no edges and an inside surface and an outside surface, much like a football. There are two ways you can make a 'bottle': you can deform a sphe…

Much helpful, thanks!!

Re: The man with 1,000 klein bottles under his house [video]

#56

Is it glass wool hanging down from his underfloor ceiling in insane qualities? I was raised to believe it's extremely dangerous to health, people crawling there scare me. Of course it's easier with forklift.

It's very commonly used in insulation in the UK.

Are you sure people were being honest with you? Or were they trying to stop an inquisitive young person from grabbing a handfull of it?

Re: The man with 1,000 klein bottles under his house [video]

#60
post #7

Cliff Stoll in case people were wondering: https://en.wikipedia.org/wiki/Clifford_Stoll I have his original book my shelf, it was fascinating when it came out. His Klein Bottle company is here: http://www.kleinbottle.com/

I was almost disappointed to learn that this was Cliff Stoll. I keep hoping there are other people out there who are that weird and awesome.
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