Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

⚠️

Sturm-Liouville & Heat Setup Survival

Keep the weight in a Sturm-Liouville orthogonality integral, shift nonhomogeneous boundary data before separating, or track a heat source's own time-dependent coefficient -- one dropped step ends the round.

💀 3 lifeives 🚫 no clock

▶ Log in to play

← Back to the arcade