Elliptic curve group law, discrete log behind ECDH, and the Frey-Ribet-Wiles argument that proved Fermat's Last Theorem, walked through with diagrams of y² = x³ + ax + b, point addition cases, and the modularity logic chain.
Uniswap's constant product x*y=k explained: why product instead of sum, IL as selling volatility, JIT liquidity on V3 concentrated liquidity, and amountOutMinimum against sandwich attacks.
Tested Q_rsqrt on Apple M4 (Mac mini) and Zen 3 (Ryzen 5800HS / WSL2). M4's -O2 already rewrites 1/sqrtf to frsqrte and ties Q_rsqrt; x86 clang needs -ffast-math or hits a 12x gap. Hand-written NEON/SSE wrappers turn out slower. Newton 0/1/2 error and the Lomont constant covered too.
A projective geometry take on why a circle viewed in perspective and an ellipse drawn on paper behave differently, and why the ellipse's major axis doesn't line up with the circle's center.
