Physics
The physics program tests the edges of general relativity and quantum field theory: chronology protection on exact time machines, explicit initial data for a composite machine, a BEC analogue, and the gravitational-wave and Gaia searches for a natural relic.
Chronology
What quantum fields do on the Ori and Xavier cores, and whether the standard divergence survives the true horizon.
Hawking's chronology protection loses its force on the Ori time machine. The full image-series tensor gives a negative image-direction eigenvalue that follows the Misner law on approach, then the local eikonal horizon cuts it off at a finite, negligible level.
Xavier's vacuum traveling-wave metric admits a switchable quotient, but the closed null generator carries the same epsilon-to-the-minus-two and epsilon-to-the-minus-four singularity as Misner. A sector-level structure and discriminator paper.
Constructive program
The composite dust construction, the BEC analogue design study, the acquisition argument and the engineering ledger.
An explicit composite initial-data construction: vacuum pp-wave core, umbilical slice, dust envelope, and a verified hand-off to Ori outer layers. The full-layer retune makes both gates positive, with an ordinary-density regime at depth that is a certified scaling extrapolation.
A design study of a BEC analogue of the Misner image-sum mechanism. The 314 micrometre image needs about 0.08 nK and the 157 micrometre antipodal correlation about 0.16 nK; B3 to B6 remain open and B1, B2, B7, B8 and B9 are fixed, so it is not a ready proposal.
The matter in a boost-holonomy time machine can be assembled, but the identification cannot be manufactured by the known classical routes. The paper maps the three acquisition routes and states the 3+1 proof gap.
The engineering ledger for a time machine: mass and density rungs, the wrap, siting at 0.008 to 0.12 AU, and the resource class of an acquired relic. The wrap is asteroid-industry scale; the survey is civilization-scale.
Synthesis
One map of the no-go results, constructive models, computed stress, searches, acquisition and engineering questions.
A critical review of the time-travel program: chronology protection, constructive machines, the quantum stress computations, the relic searches, and the acquisition and engineering ledger.
Searches
The gravitational-wave and Gaia channels for a boost-holonomy relic, with calibrated nulls and stated limits.
A boost-holonomy relic leaves an exact mass-scaling signature in gravitational waves. The corrected catalog and posterior cuts return a null, with 82 of 120 Stage-3 pairs surviving and a shared-base cluster at p = 1.000.
The completed full-sky Gaia radial-velocity pair census finds no significant signal. The family statistic is calibrated against a composition-matched null: permissive p = 0.737, strict p = 0.969.
Method
These are preprints, not peer-reviewed claims. Each paper states its assumptions, its losses, and what remains open. The priority registry carries the first-public timestamp and the SHA-256 of the PDF served here.
