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LF
Lex Fridman Cast
06/15/25
@ Lex Fridman
Grigori Perelman transformed the supercritical Navier-Stokes problem into a critical problem by introducing concepts like reduced volume and permanence entropy, which simplified the analysis of singularities.
Video
LF
Terence Tao: Hardest Problems in Mathematics, Physics & the Future of AI | Lex Fridman Podcast #472
@ Lex Fridman
06/15/25
Related Takeaways
TT
Terence Tao
06/15/25
@ Lex Fridman
The Navier-Stokes equations are supercritical, meaning that at smaller scales, the transport terms dominate over the viscosity terms, leading to unpredictable and turbulent behavior.
LF
Lex Fridman Cast
06/15/25
@ Lex Fridman
The Navier-Stokes equations are sophisticated nonlinear equations that are challenging to solve, particularly in three dimensions where singularities can form.
TT
Terence Tao
06/15/25
@ Lex Fridman
The Navier-Stokes equations govern fluid flow for incompressible fluids like water, and the Navier-Stokes regularity problem asks whether a smooth velocity field can ever concentrate to the point of becoming infinite, which would indicate a singularity.
TT
Terence Tao
06/15/25
@ Lex Fridman
The phenomenon of supercriticality versus criticality and subcriticality is a key qualitative feature that distinguishes equations that are predictable from those that are not, such as in fluid dynamics.
TT
Terence Tao
06/15/25
@ Lex Fridman
The Clay Foundation offers a million-dollar prize for solving one of the seven Millennium Prize Problems, one of which is the Navier-Stokes problem, and only one of these problems has been solved so far.
TT
Terence Tao
06/15/25
@ Lex Fridman
While the Fields Medal can inspire young mathematicians, it's important to respect those like Grigori Perelman, who prioritize their principles over recognition and awards.
TT
Terence Tao
06/15/25
@ Lex Fridman
Mathematicians care about whether something holds true 100% of the time, unlike most fields where 99.99% suffices. This is crucial in fluid dynamics, where we need to understand if there are special initial states that could lead to blow-up scenarios.
LF
Lex Fridman Cast
06/15/25
@ Lex Fridman
The point conjecture, a significant problem in mathematics, involves determining whether a three-dimensional space with certain properties can be continuously deformed into a sphere.
RP
Roger Penrose
09/29/24
@ Curt Jaimungal
The concept of twistors introduces a new kind of curved twistor, which is essential for understanding complex solutions in physics, but it also leads to inherent confusion in the theory.