The seventh most popular easily understood unsolved problem on MathOverflow

Submitted ⁨⁨2⁩ ⁨years⁩ ago⁩ by ⁨bot@lemmy.smeargle.fans [bot]⁩ to ⁨hackernews@lemmy.smeargle.fans⁩

https://mathstodon.xyz/@johncarlosbaez/111942324712561452