Francois Chaubard

speaker

744 appearances 1 recordings 1 series first heard Jul 2026 last heard 17 Jul

Francois Chaubard’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

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Y Combinator Startup Podcast · World Models, Explained · 17 Jul 2026 podcast

And so let's say this is like, and we'll go through optimal control.

So how would I actually solve this?

So the first thing I need to know is my transition function.

And so this is my state transition function, which is st plus one, given st, and my action, which I control, is ut.

And so this is my state transition or dynamics function or a world model.

This is a world model.

And so, and then what I'm trying to learn is something called a policy, which is like, what UT should I...

emit given some ST.

And so this is the ultimate question.

What should I do?

What action should I take given some state ST?

And so the way that we'll solve this, and luckily we have a world model that is perfect.

It's called Newtonian physics.

Newtonian physics.

This is like Newton's second law of motion, which is F equals MA.

And so we know that the position PT plus one is gonna equal PT plus Delta T VT plus one half Delta T squared.

So everyone's taking high school physics.

And the same thing for the velocity.

And then my acceleration is the sum of the forces, which is going to be my UT.

I think I divide by the mass and G. And so that's it.

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