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henryseg, to random
@henryseg@mathstodon.xyz avatar

What parking space number is under the backpack?

jerzone,
@jerzone@techhub.social avatar
christianp,
@christianp@mathstodon.xyz avatar

@henryseg love to see it in real life!

henryseg, to random
@henryseg@mathstodon.xyz avatar

Lots of flat foldable structures with arbitrary cross-sections. @csk @Chaimgoodmanstrauss

henryseg, to random
@henryseg@mathstodon.xyz avatar

Lots of flat foldable structures with arbitrary cross-sections. @csk @Chaimgoodmanstrauss

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henryseg, to random
@henryseg@mathstodon.xyz avatar

The next talk at this workshop (Structures - Polyhedra, Meshes, Platforms, at RICAM in Linz) is “Exploring T-hedral Origami across varied topologies”, by Kiumars Sharifmoghaddam.

henryseg, to random
@henryseg@mathstodon.xyz avatar

Rational six-bar linkage by Daniel Huczala and collaborators. Here's the paper: https://arxiv.org/pdf/2403.00558

A linkage of six bars joined by revolute joints, rotating around a loop of configurations.

henryseg,
@henryseg@mathstodon.xyz avatar

Here's an application in robotics of these kinds of linkages.

A simple robot made out of a four-bar linkage moves a marble up to the top of a marble run.

henryseg, to random
@henryseg@mathstodon.xyz avatar

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

henryseg, to random
@henryseg@mathstodon.xyz avatar

Apologies in advance to the mathematicians who follow this link: https://cims.nyu.edu/~tjl8195/survey/results.html

stefano,
@stefano@mathstodon.xyz avatar

@henryseg painful but worth it!

jadkoleilat,
@jadkoleilat@mathstodon.xyz avatar

@henryseg I felt so much pain reading this. I claim that (except a few exceptions) french conventions are the best and nothing can change my mind.

henryseg, to random
@henryseg@mathstodon.xyz avatar
henryseg, to random
@henryseg@mathstodon.xyz avatar

Surprised to find out that our Cannon-Thurston carving won a prize in the Mathematical Art Exhibition at the Joint Mathematics Meetings! With @saulsch and Will Segerman.

henryseg,
@henryseg@mathstodon.xyz avatar

Here’s the video we made about these curves if you want to know more:
https://youtu.be/FpeeFcK3lTk

henryseg, to random
@henryseg@mathstodon.xyz avatar

At the Serious recreational mathematics session at the joint mathematics meeting. Persi Diaconis’ train is stuck on the way to San Francisco so Erik Demaine is “improvising”, talking about curved origami.

henryseg,
@henryseg@mathstodon.xyz avatar

Persi made it! His talk is about strategies for playing card solitaire.

MotivicKyle,
@MotivicKyle@mathstodon.xyz avatar

@henryseg O heavy lightness, serious recreation, misshapen chaos of well-seeming forms….

henryseg, to random
@henryseg@mathstodon.xyz avatar

Red and Green lasers make for a fractal Christmas tree zoom! Full video at
https://youtu.be/uH8w7I1Og1I

video/mp4

Joshua,
@Joshua@mathstodon.xyz avatar

@henryseg it’s absolutely amazing that you are able to make this physically!

henryseg, (edited ) to random
@henryseg@mathstodon.xyz avatar

Zooming into a 3D printed fractal tree. Full video at https://youtu.be/uH8w7I1Og1I

henryseg, to random
@henryseg@mathstodon.xyz avatar

Slide-glide cyclides - a design discovered by Andrew Kepert when investigating ways to “see” why the area of a sphere is four times the area of a disk of the same radius. I added the gears and the base. Full video: https://youtu.be/KD_hRn_97RI

The disk shape.
Midway between the disk and the sphere.
The sphere shape.

henryseg,
@henryseg@mathstodon.xyz avatar

And the files to print out your own version of the mechanism are here: https://www.printables.com/model/651714-slide-glide-cyclides

henryseg, (edited ) to random
@henryseg@mathstodon.xyz avatar

I'll be giving this month's Illustrating Math online seminar, Friday 2023-10-13 at 9am US Pacific time/noon US Eastern time/6pm central Europe time. Everyone is welcome! More details at https://illustratingmath.org/node/42 (Edit: the website seems to be down, the zoom link for the talk is https://wlu.zoom.us/j/99070727614)

C3Casi,
@C3Casi@chaos.social avatar

@catselbow @henryseg the zoom-link in the QR-code seems to work

henryseg,
@henryseg@mathstodon.xyz avatar

Here’s the recording of the talk: https://www.youtube.com/watch?v=yYcOhZa53JU

henryseg, to random
@henryseg@mathstodon.xyz avatar

A very small (~1 inch long) lizard audited my general topology class today. Anyone know what species it is?

Dervishpi,
@Dervishpi@mastodon.social avatar

@henryseg I'm not a mathematician, but aren't most vertebrates topologically equivalent to a torus?

henryseg,
@henryseg@mathstodon.xyz avatar
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