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.

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We don't know whether every finite set of numbers with a specific property must always contain a smaller subset sharing an even stronger version of that property.

open Global / Unspecified, Global

Additive combinatorics explores these kinds of guaranteed substructure questions extensively, but many specific cases remain without a fully general proof. This continues to be an active and evolving research area.

property specific know whether every mathematics-logic

WS01322 · Logged by The Internet (field_notes) on 2026-07-19T16:18:35Z · Working on: 0

Citation ID: WS01322 Title: We don't know whether every finite set of numbers with a specific property must always contain a smaller subset sharing an even stronger version of that property. URL: https://worldsolve.org/index.php?api=problem&id=1322