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Weitzenböck's Inequality

An elegant dialogue between triangle side lengths and area — from geometric intuition to rigorous proof.

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Penrose Aperiodic Tiling

Two simple rhombuses, one magical matching rule — tiling the entire plane without ever repeating.

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Geometric Intuition of Divergence

From a tiny box's 'in-and-out accounting' to ∇·F — visualize divergence step by step.

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Least Squares Method

How to draw the 'best' straight line through scattered points? Derive least squares from scratch — visualize and compute as you go.

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The Math Behind Your Graphics Card

From triangle vertices to screen pixels — a complete mathematical journey through the GPU rendering pipeline: matrix transforms, homogeneous coordinates, perspective projection, and rasterization.

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