LU0016

lucas_digit_chain_empty

Alpha v34 independently verified · alpha_closed; checked-use authorized; not Stable

A decoded initial quotient constructively supplies the empty coherent digit chain.

Current library: Alpha v34, 4,223 checked-use theorems; Stable remains 432. Historical first admissions, original proof editions, and non-admitted aliases are preserved. Exact original first-admission records.

Exact expanded first-order arithmetic statement

forall p n qb qc db dc. (((exists ff_h_lmd_initial_source. ff_h_lmd_initial_source + S (n) = S ((S (0)) * qc)) /\ exists ff_q_lmd_initial_source. qb = ff_q_lmd_initial_source * S ((S (0)) * qc) + (n))) -> (((((exists ff_h_lmd_empty_initial. ff_h_lmd_empty_initial + S (n) = S ((S (0)) * qc)) /\ exists ff_q_lmd_empty_initial. qb = ff_q_lmd_empty_initial * S ((S (0)) * qc) + (n))) /\ forall lmd_index_empty. (exists lmd_gap_empty_index. lmd_gap_empty_index + S (lmd_index_empty) = (0)) -> exists lmd_current_empty lmd_successor_empty lmd_digit_empty. ((((exists ff_h_lmd_empty_current. ff_h_lmd_empty_current + S (lmd_current_empty) = S ((S (lmd_index_empty)) * qc)) /\ exists ff_q_lmd_empty_current. qb = ff_q_lmd_empty_current * S ((S (lmd_index_empty)) * qc) + (lmd_current_empty))) /\ ((((exists ff_h_lmd_empty_successor. ff_h_lmd_empty_successor + S (lmd_successor_empty) = S ((S (S lmd_index_empty)) * qc)) /\ exists ff_q_lmd_empty_successor. qb = ff_q_lmd_empty_successor * S ((S (S lmd_index_empty)) * qc) + (lmd_successor_empty))) /\ ((((exists ff_h_lmd_empty_digit. ff_h_lmd_empty_digit + S (lmd_digit_empty) = S ((S (lmd_index_empty)) * dc)) /\ exists ff_q_lmd_empty_digit. db = ff_q_lmd_empty_digit * S ((S (lmd_index_empty)) * dc) + (lmd_digit_empty))) /\ ((lmd_current_empty = (p) * (lmd_successor_empty) + (lmd_digit_empty)) /\ (exists lmd_gap_empty_digit_bound. lmd_gap_empty_digit_bound + S (lmd_digit_empty) = (p))))))))

Constructive proof overview

Generated structural guide

A decoded initial quotient constructively supplies the empty coherent digit chain.

The unchanged tactic script uses 0 declared prerequisites and contains 16 exact native proof lines.

dependency-curried kernel-checked theorem body; Alpha enrollment and checked-use authority follow separately sealed release evidence; Stable membership remains unchanged

Historical empty-context replay experiment only; that experiment persisted no certificate and granted no release authority. Current checked use follows separately sealed, independently verified proof bundles; there is no Stable promotion.

Proof neighborhood

Direct dependencies

none

Direct dependents

Formal native tactic body

Dependencies are introduced as named hypotheses before line 1. Local theorem links identify exact declared prerequisites. This exact body belongs to a complete independently kernel-checked constructive proof bundle and has Alpha checked-use authority; it does not imply Stable membership.

Read the argument

Proof checkpoints

16 script commands · 7 reading checkpoints · 0 local claims

This is a reading aid, not a new proof or a proof-tree certificate. Checkpoint groups are consecutive commands, not inferred branch boundaries. Every step links to the preserved script.

01Fix variables and assumptionsL1–7

Work with arbitrary variables or the premises of the current implication.

  1. L1
    intro p
  2. L2
    intro n
  3. L3
    intro qb
  4. L4
    intro qc
  5. L5
    intro db
  6. L6
    intro dc
  7. L7
    intro hinitial
02Separate the logical casesL8–8

Follow the explicit conjunction, disjunction, witness, or contradiction step recorded below.

  1. L8
    split
03Use earlier factsL9–9

Instantiate or apply named facts and discharge the corresponding proof obligations.

  1. L9
    exact hinitial
04Fix variables and assumptionsL10–11

Work with arbitrary variables or the premises of the current implication.

  1. L10
    intro i
  2. L11
    intro hi
05Separate the logical casesL12–13

Follow the explicit conjunction, disjunction, witness, or contradiction step recorded below.

  1. L12
    exfalso
  2. L13
    cases hi
06Calculate and transport equalitiesL14–14

Carry out the recorded arithmetic or equality steps; inspect the exact commands for their direction and premises.

  1. L14
    rewrite PA4 at hi_witness
07Use earlier factsL15–16

Instantiate or apply named facts and discharge the corresponding proof obligations.

  1. L15
    apply PA1
  2. L16
    exact hi_witness

Library-wide reading audit

Original exact command ledger · 16 lines
  1. 0001intro p
  2. 0002intro n
  3. 0003intro qb
  4. 0004intro qc
  5. 0005intro db
  6. 0006intro dc
  7. 0007intro hinitial
  8. 0008split
  9. 0009exact hinitial
  10. 0010intro i
  11. 0011intro hi
  12. 0012exfalso
  13. 0013cases hi
  14. 0014rewrite PA4 at hi_witness
  15. 0015apply PA1
  16. 0016exact hi_witness