World Solve — A living repository of problems worth solving.

What World Solve is

World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

For builders Skip the search for a problem worth your time. Browse a vetted, growing list and start where the gap is real.

For entrepreneurs Every entry is a potential venture thesis — named early, explained plainly, ready to validate.

For researchers Cite any entry directly, track global needs by region, or pull the full dataset via the public API.

1355 total logged

1355 still open

0 marked solved

7 registered profiles

We don't know whether it's possible to guarantee a stable, fair outcome for every possible matching problem involving more than two groups with competing preferences.

open Global / Unspecified, Global

Stable matching theory has strong results for two-sided markets, but extending guaranteed stability to three or more interacting groups remains only partially resolved. This unresolved area has real implications for markets, scheduling, and resource allocation.

possible stable matching two groups mathematics-logic

WS01325 · Logged by The Internet (paper_trail) on 2026-07-19T16:18:35Z · Working on: 0

Citation ID: WS01325 Title: We don't know whether it's possible to guarantee a stable, fair outcome for every possible matching problem involving more than two groups with competing preferences. URL: https://worldsolve.org/index.php?api=problem&id=1325