Henry Segerman

Mathematician working mostly in three-dimensional geometry and topology, and mathematical maker/artist working mostly in 3D printing and virtual reality.
#Math #Maths #Art #3DPrinting #Geometry

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npub1stp56taz02munq234tzhdu4v7q2cwu4cyx3u7madwz6df46n2w5sx22d3q

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henryseg_at_mathstodon.xyz@mostr.pub

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nprofile1qqsg9s6d97384d7fs9g643tk72k0q9v8w2uzrg70d7khpdx56af482gpz4mhxue69uhhyetvv9ujumt0wd68ytnsw43qz9thwden5te0v35hgar09ec82c30wfjkccteafx07m

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Author Public Key

npub1stp56taz02munq234tzhdu4v7q2cwu4cyx3u7madwz6df46n2w5sx22d3q

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Last Notes

2024-10-31 01:23:48

If you're in the vicinity of Melbourne, Australia on Wednesday 13th November, I'll be giving a public lecture on "Artistic Mathematics", 17:30-18:30, at the University of Melbourne. This is part of a conference in honour of one of my postdoc mentors, Craig Hodgson. Details at https://sites.google.com/view/agtw/hodgsonfest (and no need to register for the public lecture part!)
https://media.mathstodon.xyz/media_attachments/files/113/399/371/240/779/967/original/5fa5b0d17c5d0a04.jpg

2024-10-30 15:55:28

https://media.mathstodon.xyz/media_attachments/files/113/397/153/969/537/392/original/a632a281eded34ac.png

2024-10-28 19:03:12

New video: a geared mechanism that acts just like a scissor linkage, except that half of the arms are missing!
https://youtu.be/WDKm0OxxE4I
https://media.mathstodon.xyz/media_attachments/files/113/386/603/272/058/248/original/ad13c56271ad3064.jpg

2024-10-23 01:33:08

I finally got a couple of my 3D printed designs back up and available again at i.materialise.com:
https://i.materialise.com/en/shop/item/stereographic-projection-grid
https://i.materialise.com/en/shop/item/dodecahedral-holonomy-maze-1

2024-09-15 17:46:31

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@npub1yxx…p7am I guess I missed it first time around. Yeah the ambigrams at least are not yet up to the standard of human experts.

2024-09-15 17:40:57

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@npub1yxx…p7am Would be interesting to see this applied to ambigrams.

2024-08-19 18:49:41

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@npub1w6g…5ddw It is a reduced alternating diagram, so the number of crossings is minimal. There is only one such knot with three crossings: so yes it is the trefoil.

2024-08-09 18:38:55

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@npub159y…uf43 If so, what about “widwth”?

2024-08-08 23:20:40

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@npub159y…uf43 And “depgth”!

2024-08-08 23:20:40

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@npub159y…uf43 And “depgth”!

2024-08-03 21:20:58

Spherical conference photos from the Bridges 2024 #Mathart conference at Virginia Commonwealth University in Richmond, Virginia.
https://media.mathstodon.xyz/media_attachments/files/112/900/166/929/402/674/original/54937a1dd6ad00f3.jpg
https://media.mathstodon.xyz/media_attachments/files/112/900/166/943/503/641/original/d76c4338beea4a5a.jpg

2024-07-28 20:31:14

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@npub1gzt…8200 Does it have only one stable resting position?

2024-07-26 13:33:09

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@npub1gzt…8200 Sure, but take your time, of course!

2024-07-26 12:18:52

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@npub10w3…tmd0 I guess so, although I didn’t get that far into understanding how Guilfoyle and Klingenberg did it...

2024-07-26 12:17:29

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@npub1gzt…8200 some cool designs on the screenshot you sent! Is it an iOS app?
I think the non-convexity might be a problem for real life injection molded dice, although it would be fine for 3D printing.

2024-07-26 12:13:47

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@npub13j0…9wpp Definitely cheating!

2024-07-25 21:39:03

Video on our new constant width dice: https://youtu.be/bjOleZQfJ8k
Is it possible to design a six-sided constant width die?

2024-07-02 21:27:06

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@npub1v52…qu8a Anyone know of a good way to download all the text descriptions I wrote for my products on Shapeways?

2024-07-02 21:27:06

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@npub1v52…qu8a Anyone know of a good way to download all the text descriptions I wrote for my products on Shapeways?

2024-05-25 22:15:48

New video about wild knots:
https://youtu.be/o7U3yvMF8Sw

2024-05-14 05:44:05

Nathan Toups interviewed me on his podcast, “Functionally Imperative”. Among other things, we talked about 3D printing, VR, making stuff, the internet, and aphantasia. https://youtu.be/dcS8FjGaOws?si=HmCQr7YQuInP9tVQ

2023-08-20 17:17:12

A "recursive" mechanism, where the position of each part is determined by the positions of the previous two parts in the chain. Full video at
https://youtu.be/ckrrQTkTqIo
#3dprinting #mechanism #gears
https://media.mathstodon.xyz/media_attachments/files/110/923/073/278/500/547/original/f0b0013d0094a59e.mp4