Tools
Fast trainers, calculators, and reference notes for math practice, prediction markets, time zones, model architecture, and festive science.
Arithmetic Trainer
Timed arithmetic drills with modes, levels, streaks, accuracy, and local best scores.
Probability Grinder
Adaptive probability reps with exact-answer mental puzzles, curriculum tags, spaced repeats, and weak-pattern review.
Market Math Trainer
Fast drills and tutorial for prediction market edge, payout, fees, arbitrage, breakeven, sizing, EV, implied probability, and Kelly calculations.
Prediction Market Edge
Read-only Kalshi and Polymarket planner for fair value, EV, fees, Kelly sizing, watchlists, and trade journaling.
Arbitrage Sizer
Kalshi and Polymarket arbitrage sizing from bid and ask prices, with edge, trade size, profit, and formula breakdowns.
Time Zone Trainer
Fast drills for converting between Bergen, UTC, New York, PT, London, and market schedule times.
Gemma 4 31B-it Architecture
A visual, source-grounded guide to the Gemma 4 31B-it text decoder: layers, attention, RoPE, MLPs, logits, and generation.
Santa Claus Physics
A North Pole research report on relativity, sleigh aerodynamics, quantum chimneys, tesseract cargo, and reindeer propulsion.