Scope
Chapter “The admissibility frontier”, section “a lost sign becomes a detector”. This is assertion 2 of 3 in that section.
Expanded claim page · assertion 2 of 3
Organizes thought or workflow but is not evidence for a physical claim. joins several typed results while letting the weakest edge set the claim.
Exact assertion
The exact map sends central endpoint transports +I2 and -I2 to binary signs +1 and -1. It preserves composition, and a second traversal squares the negative return to +I2. Projector-only detection erases the sign, while determinant also misses it because det(-I2)=+1. A successful measurement therefore needs projector closure plus coherently referenced endpoint-frame tomography and a one-loop/two-loop parity control.
The claim supplies a map or analogy. It becomes a derivation only after an explicit carrier-preserving map and invariant are given.
Chapter “The admissibility frontier”, section “a lost sign becomes a detector”. This is assertion 2 of 3 in that section.
Treat the passage as organization or analogy unless a cited carrier-preserving map is supplied.
joins several typed results while letting the weakest edge set the claim.
Provide an explicit map that preserves the claimed structure, then identify an observable consequence that the analogy alone did not supply.
Source map