3 ms·

Repulsive Shells [video]

37 points by surprisetalk 2y ago

kragen 2y ago
this is brilliant. i can only begin to imagine the massive amount of effort that went into developing all the ideas he explains in 11 minutes (though possibly some of it is less of a stroke of genius than it appears to me, since i'm not familiar with the space). it reversed all the dihedral angles of my mind longer talk from 2 years ago at https://www.youtube.com/watch?v=dtYGiCpzzbA https://www.youtube.com/watch?v=dtYGiCpzzbA his video https://www.youtube.com/watch?v=6j6WWzPV6aY https://www.youtube.com/watch?v=6j6WWzPV6aY is also great
Waterluvian 2y ago
I’m in love with this video because something about it teleported me back to this time in grade 12 when I snuck into lectures at the local university and listened to stuff I had no hope of fully understating. It created this incredible electricity of curiosity in me. I was so excited for what was over the next hill of my education. I think it helps that the presenter never really introduces his topic, just like sneaking into a lecture without a syllabus. P.S. how cool must it be for Euler that we’re here in the future and this computer simulation mathematician is talking about “Eulerean methods.”
Vecr 2y ago
When he talks about black holes and a ship taking forever to approach the event horizon, you won't actually be able to see it forever, it'll red shift out in some of the old basic models and I have no idea what it would do in real life. Assuming a very large black hole so the ship won't get ripped apart.
hinkley 2y ago
At the end of the day, isn't matter just repulsive shells? You can pass cosmic rays through the body and not hit anything, but if I slap you in the face I feel pretty damned solid, and so does your jaw.
- cma 2y ago
  If you just mean force wouldn't that have infinite repulsion at close distance whereas we observe both quantum tunneling and exclusion principle.
- deleted 2y ago
  [deleted]
polishdude20 2y ago
From my limited understanding, you consider the space of all possible mesh arrangements and the ones where there are intersections have a higher slowly tending to infinite "slope". So getting from one pose to another requires traversing this space but like avoiding the steeper slopes?
dang 2y ago
Repulsive Shells [video] - https://news.ycombinator.com/item?id=41080642 https://news.ycombinator.com/item?id=41080642 - July 2024 (19 comments)

37 points by surprisetalk 2y ago

this is brilliant. i can only begin to imagine the massive amount of effort that went into developing all the ideas he explains in 11 minutes (though possibly some of it is less of a stroke of genius than it appears to me, since i'm not familiar with the space). it reversed all the dihedral angles of my mind longer talk from 2 years ago at https://www.youtube.com/watch?v=dtYGiCpzzbA https://www.youtube.com/watch?v=dtYGiCpzzbA his video https://www.youtube.com/watch?v=6j6WWzPV6aY https://www.youtube.com/watch?v=6j6WWzPV6aY is also great

Waterluvian 2y ago

I’m in love with this video because something about it teleported me back to this time in grade 12 when I snuck into lectures at the local university and listened to stuff I had no hope of fully understating. It created this incredible electricity of curiosity in me. I was so excited for what was over the next hill of my education. I think it helps that the presenter never really introduces his topic, just like sneaking into a lecture without a syllabus. P.S. how cool must it be for Euler that we’re here in the future and this computer simulation mathematician is talking about “Eulerean methods.”

Vecr 2y ago

When he talks about black holes and a ship taking forever to approach the event horizon, you won't actually be able to see it forever, it'll red shift out in some of the old basic models and I have no idea what it would do in real life. Assuming a very large black hole so the ship won't get ripped apart.

hinkley 2y ago

At the end of the day, isn't matter just repulsive shells? You can pass cosmic rays through the body and not hit anything, but if I slap you in the face I feel pretty damned solid, and so does your jaw.

cma 2y ago
If you just mean force wouldn't that have infinite repulsion at close distance whereas we observe both quantum tunneling and exclusion principle.
deleted 2y ago
[deleted]

polishdude20 2y ago

From my limited understanding, you consider the space of all possible mesh arrangements and the ones where there are intersections have a higher slowly tending to infinite "slope". So getting from one pose to another requires traversing this space but like avoiding the steeper slopes?

dang 2y ago

Repulsive Shells [video] - https://news.ycombinator.com/item?id=41080642 https://news.ycombinator.com/item?id=41080642 - July 2024 (19 comments)