The signature of ∆ is (0,+,+) with a degenerate temporal coordinate, and the intrinsic geometry of a foliation leaf ∆'=S2 is nonevolutional.
Metric system | Time signature | signature | digital signature | United States Metric Board | time signature | the 1998 club's two signature moments | Signature Sounds Recordings | Signature | metric system | Digital Signature Algorithm | Digital signature | Alex Metric | U.S. Metric Association | The Metric Marvels | State Street Bank v. Signature Financial Group | Signature Team | Signature (dance group) | Signature Books | Performance metric | Metric signature | Metric expansion of space | metric expansion of space | Lamport signature | Kerr metric | Kantowski-Sachs metric | Granahan's signature, as used on American currency | Gödel metric | Friedmann–Lemaître–Robertson–Walker metric | Fisher information metric |