A successor of the actual Introspect induction #
The current game's tests construct the replacement. Canonicalization and decoder recovery discharge the selected-measurement identity, and decoding gives the next structural invariant. The fixed hiding and primitive Z errors can be reused on the enlarged auxiliary space.
Stated in a bipartite model (Phase 4 of planning/mipco-track.md): the register state is the
register model Ξ.reg (ι → F) of a normalized auxiliary model Ξ, and the successor lives on the
register model (Ξ.expandA t₀).reg (ι → F) of its one-sided extension by the dilation ancilla
DilationAncilla (Option ((ι → F) × A)) K in its fixed state t₀ = inl (none, 0). The size K
is chosen by the dilation (exists_game_adaptive_prefix_dilation), so the successor theorem
returns it. The successor family is the registered replacement, a family of POVMs in
Matrix (ι → F) (ι → F) (Matrix T T 𝒜), and its invariant is the decoded next-prefix invariant
over that algebra. The primitive Z errors of both players (introAliceZError, defined here next
to introBobZError) and their hiding errors are transported exactly to the extended model
(StrategyReplacementErrors); the successor theorem records these equalities for the iteration.
The actual question-indexed family after inserting the decoded replacement, with the original family retained at every other question.
Equations
- One or more equations did not get rendered due to their size.
Instances For
The returned raw selected measurement carries the complete next option-valued product form, including valid-answer support.
Equations
- One or more equations did not get rendered due to their size.
Instances For
The primitive Bob-Z error in the common register model.
Equations
- One or more equations did not get rendered due to their size.
Instances For
The primitive Bob-Z error is unchanged by a first-player ancilla in a fixed state.
Alice's primitive computational-basis error, with malformed Pauli answers kept as the separate option outcome.
Equations
- One or more equations did not get rendered due to their size.
Instances For
The actual current tests produce a projective next family and its complete prefix invariant. No selected-measurement or mixing-error bound is assumed: those are derived from the supplied current invariant. The primitive Z errors and the hiding errors of both players are unchanged on the extended model.