Exact expanded first-order arithmetic statement
forall b c d e k. (forall jt_index_prefixsource jt_value_prefixsource. (exists jt_gap_prefixsourceindex. jt_gap_prefixsourceindex+S (jt_index_prefixsource)=(k)) -> (((exists fs_h_jt_prefixsourceold. fs_h_jt_prefixsourceold + S (jt_value_prefixsource) = S ((S (jt_index_prefixsource)) * c)) /\ exists fs_q_jt_prefixsourceold. b = fs_q_jt_prefixsourceold * S ((S (jt_index_prefixsource)) * c) + (jt_value_prefixsource))) -> (((exists fs_h_jt_prefixsourcenew. fs_h_jt_prefixsourcenew + S (jt_value_prefixsource) = S ((S (jt_index_prefixsource)) * e)) /\ exists fs_q_jt_prefixsourcenew. d = fs_q_jt_prefixsourcenew * S ((S (jt_index_prefixsource)) * e) + (jt_value_prefixsource)))) -> (forall jt_index_prefixtarget jt_left_prefixtarget jt_right_prefixtarget. (exists jt_gap_prefixtargetindex. jt_gap_prefixtargetindex+S (jt_index_prefixtarget)=(k)) -> (((exists fs_h_jt_prefixtargetleft. fs_h_jt_prefixtargetleft + S (jt_left_prefixtarget) = S ((S (jt_index_prefixtarget)) * c)) /\ exists fs_q_jt_prefixtargetleft. b = fs_q_jt_prefixtargetleft * S ((S (jt_index_prefixtarget)) * c) + (jt_left_prefixtarget))) -> (((exists fs_h_jt_prefixtargetright. fs_h_jt_prefixtargetright + S (jt_right_prefixtarget) = S ((S (jt_index_prefixtarget)) * e)) /\ exists fs_q_jt_prefixtargetright. d = fs_q_jt_prefixtargetright * S ((S (jt_index_prefixtarget)) * e) + (jt_right_prefixtarget))) -> jt_left_prefixtarget=jt_right_prefixtarget)Constructive proof overview
Generated structural guide
An actual one-way beta prefix extension preserves decoded coordinates.
The unchanged tactic script uses 1 declared prerequisite and contains 24 exact native proof lines.
Alpha v35 checked-use · first admitted v35 · independently kernel and Lean verified; not Stable
Proof neighborhood
Direct dependencies
beta_at_unique Alpha theorem; checked-use authorizedDirect 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
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 assumptionsL1–10
02Fix variables and assumptionsL11–12
03Use earlier factsL13–22
Instantiate or apply named facts and discharge the corresponding proof obligations.
Original exact command ledger · 24 lines
- 0001
intro b - 0002
intro c - 0003
intro d - 0004
intro e - 0005
intro k - 0006
intro h - 0007
intro i - 0008
intro a - 0009
intro z - 0010
intro hi - 0011
intro ha - 0012
intro hz - 0013
specialize beta_at_unique (d) - 0014
specialize beta_at_unique (e) - 0015
specialize beta_at_unique (i) - 0016
specialize beta_at_unique (a) - 0017
specialize beta_at_unique (z) - 0018
apply beta_at_unique - 0019
specialize h (i) - 0020
specialize h (a) - 0021
apply h - 0022
exact hi - 0023
exact ha - 0024
exact hz