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Roman Concrete, Brain “Cognitive Legos,” DeepSeek, and Econophysics (EP. 21)

Roman Concrete, Brain “Cognitive Legos,” DeepSeek, and Econophysics (EP. 21)

From First Principles vor 9 Monaten

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1:58:42

Hosted by Lester Nare and Krishna Choudhary, this episode jumps
from ancient engineering to modern AI and markets. We start with
the newly uncovered Pompeii worksite that finally shows how Romans
mixed their concrete — and why it “self-heals.” Then we pivot into
a Princeton neuroscience idea that the brain builds complex thought
like LEGO bricks (compositional neural subspaces). From there, we
break down DeepSeek’s “manifold-constrained hyperconnections” as a
stability mechanism for scaling deep nets. And we close with
econophysics: a Physical Review Letters result arguing the
square-root law of market impact is strictly universal across
stocks and time. Summary Roman concrete’s missing step — Pompeii
evidence for “hot mixing,” lime clasts, and why cracks can heal
themselves for millennia. Cognitive LEGOs — a compositionality
framework where brains reuse shared neural subspaces to assemble
new tasks. DeepSeek’s scaling trick — constraining hyperconnections
to a stable manifold to avoid vanishing/exploding signals. The
universal market law — PRL evidence that price impact follows a
square-root rule across stocks, traders, and decades. Show Notes
⁠Roman Concrete (Pompeii worksite) — Nature Communications (2025)⁠
⁠Hot Mixing & Lime Clasts — Science Advances (2023)⁠
⁠Compositional Neural Subspaces (“Cognitive LEGOs”) — Nature
(2025)⁠ ⁠mHC: Manifold-Constrained Hyper-Connections — arXiv⁠
⁠Square-Root Law of Market Impact (Universality) — Physical Review
Letters⁠ ⁠Artemis II Countdown Demonstration Test — NASA