SMRTR Science & EngineeringJun 11, 2025Quanta Magazine

Epic Effort to Ground Physics in Math Opens Up the Secrets of Time

SMRTR summary

Mathematicians Yu Deng, Zaher Hani, and Xiao Ma have solved a key part of David Hilbert's sixth problem, proving how individual particle behavior leads to complex fluid motion. Their work mathematically demonstrates why time flows in one direction, resolving a longstanding paradox between microscopic reversibility and macroscopic irreversibility in physics.

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