EU001A

euler_unit_scaled_prefix_drop_last

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

Restrict the independently specified unit-scaled action to its predecessor prefix.

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 expanded first-order arithmetic statement

forall a m b c d e l. (forall eu_scale_index_scale_drop_old eu_scale_source_scale_drop_old eu_scale_target_scale_drop_old. (exists eut_gap_eu_scale_drop_old_index. eut_gap_eu_scale_drop_old_index + S (eu_scale_index_scale_drop_old) = (S l)) -> (((exists fs_h_eu_scale_drop_old_source. fs_h_eu_scale_drop_old_source + S (eu_scale_source_scale_drop_old) = S ((S (eu_scale_index_scale_drop_old)) * c)) /\ exists fs_q_eu_scale_drop_old_source. b = fs_q_eu_scale_drop_old_source * S ((S (eu_scale_index_scale_drop_old)) * c) + (eu_scale_source_scale_drop_old))) -> (((exists fs_h_eu_scale_drop_old_target. fs_h_eu_scale_drop_old_target + S (eu_scale_target_scale_drop_old) = S ((S (eu_scale_index_scale_drop_old)) * e)) /\ exists fs_q_eu_scale_drop_old_target. d = fs_q_eu_scale_drop_old_target * S ((S (eu_scale_index_scale_drop_old)) * e) + (eu_scale_target_scale_drop_old))) -> (((forall eut_divisor_eu_scale_drop_old_unit. (exists eut_left_eu_scale_drop_old_unit. (eu_scale_index_scale_drop_old) = eut_divisor_eu_scale_drop_old_unit * eut_left_eu_scale_drop_old_unit) -> (exists eut_right_eu_scale_drop_old_unit. (m) = eut_divisor_eu_scale_drop_old_unit * eut_right_eu_scale_drop_old_unit) -> eut_divisor_eu_scale_drop_old_unit = 1) -> (exists eu_mod_left_scale_drop_old_scaled eu_mod_right_scale_drop_old_scaled. ((a)*eu_scale_source_scale_drop_old) + (m) * eu_mod_left_scale_drop_old_scaled = (eu_scale_target_scale_drop_old) + (m) * eu_mod_right_scale_drop_old_scaled)) /\ (~(forall eut_divisor_eu_scale_drop_old_unit. (exists eut_left_eu_scale_drop_old_unit. (eu_scale_index_scale_drop_old) = eut_divisor_eu_scale_drop_old_unit * eut_left_eu_scale_drop_old_unit) -> (exists eut_right_eu_scale_drop_old_unit. (m) = eut_divisor_eu_scale_drop_old_unit * eut_right_eu_scale_drop_old_unit) -> eut_divisor_eu_scale_drop_old_unit = 1) -> (exists eu_mod_left_scale_drop_old_unchanged eu_mod_right_scale_drop_old_unchanged. (eu_scale_source_scale_drop_old) + (m) * eu_mod_left_scale_drop_old_unchanged = (eu_scale_target_scale_drop_old) + (m) * eu_mod_right_scale_drop_old_unchanged)))) -> (forall eu_scale_index_scale_drop_new eu_scale_source_scale_drop_new eu_scale_target_scale_drop_new. (exists eut_gap_eu_scale_drop_new_index. eut_gap_eu_scale_drop_new_index + S (eu_scale_index_scale_drop_new) = (l)) -> (((exists fs_h_eu_scale_drop_new_source. fs_h_eu_scale_drop_new_source + S (eu_scale_source_scale_drop_new) = S ((S (eu_scale_index_scale_drop_new)) * c)) /\ exists fs_q_eu_scale_drop_new_source. b = fs_q_eu_scale_drop_new_source * S ((S (eu_scale_index_scale_drop_new)) * c) + (eu_scale_source_scale_drop_new))) -> (((exists fs_h_eu_scale_drop_new_target. fs_h_eu_scale_drop_new_target + S (eu_scale_target_scale_drop_new) = S ((S (eu_scale_index_scale_drop_new)) * e)) /\ exists fs_q_eu_scale_drop_new_target. d = fs_q_eu_scale_drop_new_target * S ((S (eu_scale_index_scale_drop_new)) * e) + (eu_scale_target_scale_drop_new))) -> (((forall eut_divisor_eu_scale_drop_new_unit. (exists eut_left_eu_scale_drop_new_unit. (eu_scale_index_scale_drop_new) = eut_divisor_eu_scale_drop_new_unit * eut_left_eu_scale_drop_new_unit) -> (exists eut_right_eu_scale_drop_new_unit. (m) = eut_divisor_eu_scale_drop_new_unit * eut_right_eu_scale_drop_new_unit) -> eut_divisor_eu_scale_drop_new_unit = 1) -> (exists eu_mod_left_scale_drop_new_scaled eu_mod_right_scale_drop_new_scaled. ((a)*eu_scale_source_scale_drop_new) + (m) * eu_mod_left_scale_drop_new_scaled = (eu_scale_target_scale_drop_new) + (m) * eu_mod_right_scale_drop_new_scaled)) /\ (~(forall eut_divisor_eu_scale_drop_new_unit. (exists eut_left_eu_scale_drop_new_unit. (eu_scale_index_scale_drop_new) = eut_divisor_eu_scale_drop_new_unit * eut_left_eu_scale_drop_new_unit) -> (exists eut_right_eu_scale_drop_new_unit. (m) = eut_divisor_eu_scale_drop_new_unit * eut_right_eu_scale_drop_new_unit) -> eut_divisor_eu_scale_drop_new_unit = 1) -> (exists eu_mod_left_scale_drop_new_unchanged eu_mod_right_scale_drop_new_unchanged. (eu_scale_source_scale_drop_new) + (m) * eu_mod_left_scale_drop_new_unchanged = (eu_scale_target_scale_drop_new) + (m) * eu_mod_right_scale_drop_new_unchanged))))

Constructive proof overview

Generated structural guide

Restrict the independently specified unit-scaled action to its predecessor prefix.

The unchanged tactic script uses 1 declared prerequisite and contains 24 exact native proof lines.

Alpha v34 checked-use · first admitted v31 · independently kernel and Lean verified; not Stable

Proof neighborhood

Direct dependencies

le_succ Stable theorem; checked-use authorized

Direct dependents

EU001E euler_unit_count_product_balance

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

24 script commands · 3 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 assumptionsL1–10

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

  1. L1
    intro a
  2. L2
    intro m
  3. L3
    intro b
  4. L4
    intro c
  5. L5
    intro d
  6. L6
    intro e
  7. L7
    intro l
  8. L8
    intro h
  9. L9
    intro i
  10. L10
    intro u
02Fix variables and assumptionsL11–14

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

  1. L11
    intro v
  2. L12
    intro hi
  3. L13
    intro hu
  4. L14
    intro hv
03Use earlier factsL15–24

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

  1. L15
    specialize h (i)
  2. L16
    specialize h (u)
  3. L17
    specialize h (v)
  4. L18
    apply h
  5. L19
    specialize le_succ (S i)
  6. L20
    specialize le_succ (l)
  7. L21
    apply le_succ
  8. L22
    exact hi
  9. L23
    exact hu
  10. L24
    exact hv

Library-wide reading audit

Original exact command ledger · 24 lines
  1. 0001intro a
  2. 0002intro m
  3. 0003intro b
  4. 0004intro c
  5. 0005intro d
  6. 0006intro e
  7. 0007intro l
  8. 0008intro h
  9. 0009intro i
  10. 0010intro u
  11. 0011intro v
  12. 0012intro hi
  13. 0013intro hu
  14. 0014intro hv
  15. 0015specialize h (i)
  16. 0016specialize h (u)
  17. 0017specialize h (v)
  18. 0018apply h
  19. 0019specialize le_succ (S i)
  20. 0020specialize le_succ (l)
  21. 0021apply le_succ
  22. 0022exact hi
  23. 0023exact hu
  24. 0024exact hv