Posts

Cubic Equation Solver: a Shiny App
Asking AI to create a cubic equation solver.
Last updated on May 31, 2026 1 min read
Notes on One-Stage Cluster Sampling
ICC, adjusted R-squared, and design effect.
Last updated on May 18, 2026 4 min read
Solving for x in x^2≡65 mod 343
A problem from Quora: an exercise.
Last updated on Apr 2, 2026 2 min read
A Note on Catalan Number
A small note recording learning process.
Last updated on Mar 15, 2026 3 min read
Finding Maximum and Range: Two Exercises
Solving math problems using M365 Copilot.
Last updated on Mar 20, 2026 7 min read
Finding Integer Points on a Circle
Small mathematical experiment
Last updated on Mar 10, 2026 2 min read
Problem Solving: Using Math and Brute Force
An interesting elementary math problem
Last updated on Jan 30, 2026 2 min read
Using data.table to Do Math: a Tiny Example
An exercise of using data.table
Last updated on Jan 22, 2026 1 min read
A Note on Spread of Multivariate Distriution
a small note — odds and ends
Last updated on Jan 13, 2026 2 min read
A Probability Puzzle
A small simulation study
Last updated on Sep 1, 2025 2 min read