How this works / Signed record

Problem revision

Universal optimality of the triangular lattice in the plane

This record was signed by PubPhys and added to the public log. Download the proof and check it with the open verifier: it recomputes every fingerprint, checks the PubPhys signature against the published key, finds the entry in the log and checks the Bitcoin date, without relying on this site.

Record hash
b6f573745e9f262ee521363d74e123f93801358665647cc65a62a310dc8817b1
Content hash
0e79128da313f39730e405d51c19783b4011e7cfa01a4960e47040eee1f282c5
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,607
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:05Z — the Bitcoin date is the one that counts