Ping-Jung(Lawrence) Lu
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A learning log - notes on the math and code I find interesting.

Welcome to My Learning Log

June 10, 2026

Why I'm keeping a public notebook of the math and code ideas I find beautiful — and how this blog is set up.

metanotes1 min read

Estimating π with Monte Carlo

June 9, 2026

A classic: throw random darts at a square, count how many land in the circle, and watch π emerge. Math, code, a plot, and a convergence table.

mathpythonsimulation1 min read

A One-Line Intuition for Gradient Descent

June 8, 2026

The gradient points uphill, so we step the other way. A short derivation of why that's the locally optimal move.

mathmachine-learningoptimization1 min read

Last updated: August 21, 2026

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