Ryan Selesnik

MSc in Control and Optimisation at Imperial College London

[Ryan Selesnik @RyanSelesnik1]

My dream project is helping a farmer track his cows

[Mayukh @mayukh_panja]

I have been simulating fluids for 15 years.

There is a widespread impression that the Navier Stokes equations have been now “solved”, thanks to OpenAI.

This suggests that they were “unsolved” so far and this was a major engineering breakthrough.

This is not true. This misunderstanding deeply bothers me as a computational physicist.

So I had to put this out.

[Ryan Selesnik @RyanSelesnik1]

"We didn’t work on (1) time travel, (2) teleportation, and (3) antigravity. They are not important problems because we do not have an attack. It’s not the consequence that makes a problem important, it is that you have a reasonable attack. That is what makes a problem important"

[Ryan Selesnik @RyanSelesnik1]

@satnam6502 @glebedel Agreed

[Algebra Etc. @AlgebraFact]

Not in geometric mean.

https://t.co/WVFroS63VG

[Ryan Selesnik @RyanSelesnik1]

I remember I read a book once in high school by Barbara Oakley on how to do math, and she said you should focus hard on a specific problem and then take a break to let your brain enter a “diffusion mode” where the latent space is explored 🤔

[Ryan Selesnik @RyanSelesnik1]

OG quote is

“Tuned COCP (Convex Optimization Control Policy) is the PID controller of the 21st century” by none other than Stephen P. Boyd

[Ryan Selesnik @RyanSelesnik1]

MPC is the 21st century PID

[Ryan Selesnik @RyanSelesnik1]

@AFpost 🤦‍♂️🤦‍♂️🤦‍♂️

[Ari Seff @ari_seff]

covariance vs. mutual information

[Ryan Selesnik @RyanSelesnik1]

Cool website I stumbled upon https://t.co/bhBk51fUxD

[Ryan Selesnik @RyanSelesnik1]

@prasenx Linear regression

[Ryan Selesnik @RyanSelesnik1]

TIL that perplexity is just entropy exponentiated.

So entropy measures the average bits while perplexity gives the raw number of combinations (2^ave_num_bits)

[Ryan Selesnik @RyanSelesnik1]

@___Harald___ And this might be a bit too early to tell, but have you seen any payoff from hand-writing code?

[Ryan Selesnik @RyanSelesnik1]

@___Harald___ Do you have any examples of this from open pilot? Have you seen it pay off by spending more time on good, simple code?

[Ryan Selesnik @RyanSelesnik1]

Some RRT* fun

[Ryan Selesnik @RyanSelesnik1]

Busy trying to get a PhD student's simulation environment up and running. #progress #drones #cringe

[Ryan Selesnik @RyanSelesnik1]

@___Harald___ Yeah same. Sometimes it’s a lot of fun but sometimes I feel like it gets out of hand and all of sudden you have so much code and you have no intuition for how it connects and works. I don’t like that feeling :/

[Ryan Selesnik @RyanSelesnik1]

People are worried about AI stealing their jobs, but I am absoluting LOVING coding again. Not sure if this is good or bad...