on better.codes
DefendThe Proximity Prize
What it asks
Prove in Lean how sound a Reed-Solomon proximity test is: a radius proven safe from below, and one proven unsafe from above.
Why it matters
Hash-based proof systems, the kind blockchains are moving to, rest on these bounds. Closing the gap means smaller proofs that anyone can trust.
Checked by the challenge's own verifier. Mathlana runs the same Lean check first, within minutes.

