Observed arrival · 2026-09-18
Epilogue: problems worth chasing
A curated catalog of difficult mathematical, physical, and computer-science problems, including the lore around how they were solved or remain open.
- For
- Curious readers of mathematics, physics, and computer science
- Worth noticing
- The catalog separates open and solved problems across three fields, with dates tracing each problem’s history.
Field notes
The homepage uses field and status filters to arrange six featured problems across mathematics, physics, and computer science. Each entry pairs a plain-language question with a compact historical timeline, including Fermat’s Last Theorem from 1637 to 1995 and the Solar Neutrino Problem from 1968 to 2002. A newsletter promises notices when new problem pages are published. The footer also contains a playful but demanding AI-agent contact protocol centered on the Riemann Hypothesis.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue