HD000D

beta_horner_derivative_only_exists_unique

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

Every beta-coded natural polynomial has one and only one exact formal derivative at every evaluation point.

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 b c t l. exists z. ((exists ff_value_hd_only. (exists ff_u_hd_only_pair ff_v_hd_only_pair ff_d_hd_only_pair ff_e_hd_only_pair. ((((((exists fs_h_ph_hd_only_pair_body_value_start. fs_h_ph_hd_only_pair_body_value_start + S (0) = S ((S (0)) * ff_v_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_value_start. ff_u_hd_only_pair = fs_q_ph_hd_only_pair_body_value_start * S ((S (0)) * ff_v_hd_only_pair) + (0))) /\ ((((exists fs_h_ph_hd_only_pair_body_value_terminal. fs_h_ph_hd_only_pair_body_value_terminal + S (ff_value_hd_only) = S ((S (l)) * ff_v_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_value_terminal. ff_u_hd_only_pair = fs_q_ph_hd_only_pair_body_value_terminal * S ((S (l)) * ff_v_hd_only_pair) + (ff_value_hd_only))) /\ forall ff_i_ph_hd_only_pair_body_value_steps. (exists ph_bound_hd_only_pair_body_value_steps. ph_bound_hd_only_pair_body_value_steps + S ff_i_ph_hd_only_pair_body_value_steps = l) -> exists ff_coefficient_ph_hd_only_pair_body_value_steps ff_previous_ph_hd_only_pair_body_value_steps ff_current_ph_hd_only_pair_body_value_steps. ((((exists fs_h_ph_hd_only_pair_body_value_steps_coefficient. fs_h_ph_hd_only_pair_body_value_steps_coefficient + S (ff_coefficient_ph_hd_only_pair_body_value_steps) = S ((S (ff_i_ph_hd_only_pair_body_value_steps)) * c)) /\ exists fs_q_ph_hd_only_pair_body_value_steps_coefficient. b = fs_q_ph_hd_only_pair_body_value_steps_coefficient * S ((S (ff_i_ph_hd_only_pair_body_value_steps)) * c) + (ff_coefficient_ph_hd_only_pair_body_value_steps))) /\ ((((exists fs_h_ph_hd_only_pair_body_value_steps_before. fs_h_ph_hd_only_pair_body_value_steps_before + S (ff_previous_ph_hd_only_pair_body_value_steps) = S ((S (ff_i_ph_hd_only_pair_body_value_steps)) * ff_v_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_value_steps_before. ff_u_hd_only_pair = fs_q_ph_hd_only_pair_body_value_steps_before * S ((S (ff_i_ph_hd_only_pair_body_value_steps)) * ff_v_hd_only_pair) + (ff_previous_ph_hd_only_pair_body_value_steps))) /\ ((((exists fs_h_ph_hd_only_pair_body_value_steps_after. fs_h_ph_hd_only_pair_body_value_steps_after + S (ff_current_ph_hd_only_pair_body_value_steps) = S ((S (S ff_i_ph_hd_only_pair_body_value_steps)) * ff_v_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_value_steps_after. ff_u_hd_only_pair = fs_q_ph_hd_only_pair_body_value_steps_after * S ((S (S ff_i_ph_hd_only_pair_body_value_steps)) * ff_v_hd_only_pair) + (ff_current_ph_hd_only_pair_body_value_steps))) /\ ff_current_ph_hd_only_pair_body_value_steps = ff_previous_ph_hd_only_pair_body_value_steps * t + ff_coefficient_ph_hd_only_pair_body_value_steps)))))) /\ (((((exists fs_h_ph_hd_only_pair_body_derivative_start. fs_h_ph_hd_only_pair_body_derivative_start + S (0) = S ((S (0)) * ff_e_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_derivative_start. ff_d_hd_only_pair = fs_q_ph_hd_only_pair_body_derivative_start * S ((S (0)) * ff_e_hd_only_pair) + (0))) /\ ((((exists fs_h_ph_hd_only_pair_body_derivative_terminal. fs_h_ph_hd_only_pair_body_derivative_terminal + S (z) = S ((S (l)) * ff_e_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_derivative_terminal. ff_d_hd_only_pair = fs_q_ph_hd_only_pair_body_derivative_terminal * S ((S (l)) * ff_e_hd_only_pair) + (z))) /\ forall ff_i_ph_hd_only_pair_body_derivative_steps. (exists ph_bound_hd_only_pair_body_derivative_steps. ph_bound_hd_only_pair_body_derivative_steps + S ff_i_ph_hd_only_pair_body_derivative_steps = l) -> exists ff_coefficient_ph_hd_only_pair_body_derivative_steps ff_previous_ph_hd_only_pair_body_derivative_steps ff_current_ph_hd_only_pair_body_derivative_steps. ((((exists fs_h_ph_hd_only_pair_body_derivative_steps_coefficient. fs_h_ph_hd_only_pair_body_derivative_steps_coefficient + S (ff_coefficient_ph_hd_only_pair_body_derivative_steps) = S ((S (ff_i_ph_hd_only_pair_body_derivative_steps)) * ff_v_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_derivative_steps_coefficient. ff_u_hd_only_pair = fs_q_ph_hd_only_pair_body_derivative_steps_coefficient * S ((S (ff_i_ph_hd_only_pair_body_derivative_steps)) * ff_v_hd_only_pair) + (ff_coefficient_ph_hd_only_pair_body_derivative_steps))) /\ ((((exists fs_h_ph_hd_only_pair_body_derivative_steps_before. fs_h_ph_hd_only_pair_body_derivative_steps_before + S (ff_previous_ph_hd_only_pair_body_derivative_steps) = S ((S (ff_i_ph_hd_only_pair_body_derivative_steps)) * ff_e_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_derivative_steps_before. ff_d_hd_only_pair = fs_q_ph_hd_only_pair_body_derivative_steps_before * S ((S (ff_i_ph_hd_only_pair_body_derivative_steps)) * ff_e_hd_only_pair) + (ff_previous_ph_hd_only_pair_body_derivative_steps))) /\ ((((exists fs_h_ph_hd_only_pair_body_derivative_steps_after. fs_h_ph_hd_only_pair_body_derivative_steps_after + S (ff_current_ph_hd_only_pair_body_derivative_steps) = S ((S (S ff_i_ph_hd_only_pair_body_derivative_steps)) * ff_e_hd_only_pair)) /\ exists fs_q_ph_hd_only_pair_body_derivative_steps_after. ff_d_hd_only_pair = fs_q_ph_hd_only_pair_body_derivative_steps_after * S ((S (S ff_i_ph_hd_only_pair_body_derivative_steps)) * ff_e_hd_only_pair) + (ff_current_ph_hd_only_pair_body_derivative_steps))) /\ ff_current_ph_hd_only_pair_body_derivative_steps = ff_previous_ph_hd_only_pair_body_derivative_steps * t + ff_coefficient_ph_hd_only_pair_body_derivative_steps))))))))) /\ forall w. (exists ff_value_hd_only_other. (exists ff_u_hd_only_other_pair ff_v_hd_only_other_pair ff_d_hd_only_other_pair ff_e_hd_only_other_pair. ((((((exists fs_h_ph_hd_only_other_pair_body_value_start. fs_h_ph_hd_only_other_pair_body_value_start + S (0) = S ((S (0)) * ff_v_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_value_start. ff_u_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_value_start * S ((S (0)) * ff_v_hd_only_other_pair) + (0))) /\ ((((exists fs_h_ph_hd_only_other_pair_body_value_terminal. fs_h_ph_hd_only_other_pair_body_value_terminal + S (ff_value_hd_only_other) = S ((S (l)) * ff_v_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_value_terminal. ff_u_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_value_terminal * S ((S (l)) * ff_v_hd_only_other_pair) + (ff_value_hd_only_other))) /\ forall ff_i_ph_hd_only_other_pair_body_value_steps. (exists ph_bound_hd_only_other_pair_body_value_steps. ph_bound_hd_only_other_pair_body_value_steps + S ff_i_ph_hd_only_other_pair_body_value_steps = l) -> exists ff_coefficient_ph_hd_only_other_pair_body_value_steps ff_previous_ph_hd_only_other_pair_body_value_steps ff_current_ph_hd_only_other_pair_body_value_steps. ((((exists fs_h_ph_hd_only_other_pair_body_value_steps_coefficient. fs_h_ph_hd_only_other_pair_body_value_steps_coefficient + S (ff_coefficient_ph_hd_only_other_pair_body_value_steps) = S ((S (ff_i_ph_hd_only_other_pair_body_value_steps)) * c)) /\ exists fs_q_ph_hd_only_other_pair_body_value_steps_coefficient. b = fs_q_ph_hd_only_other_pair_body_value_steps_coefficient * S ((S (ff_i_ph_hd_only_other_pair_body_value_steps)) * c) + (ff_coefficient_ph_hd_only_other_pair_body_value_steps))) /\ ((((exists fs_h_ph_hd_only_other_pair_body_value_steps_before. fs_h_ph_hd_only_other_pair_body_value_steps_before + S (ff_previous_ph_hd_only_other_pair_body_value_steps) = S ((S (ff_i_ph_hd_only_other_pair_body_value_steps)) * ff_v_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_value_steps_before. ff_u_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_value_steps_before * S ((S (ff_i_ph_hd_only_other_pair_body_value_steps)) * ff_v_hd_only_other_pair) + (ff_previous_ph_hd_only_other_pair_body_value_steps))) /\ ((((exists fs_h_ph_hd_only_other_pair_body_value_steps_after. fs_h_ph_hd_only_other_pair_body_value_steps_after + S (ff_current_ph_hd_only_other_pair_body_value_steps) = S ((S (S ff_i_ph_hd_only_other_pair_body_value_steps)) * ff_v_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_value_steps_after. ff_u_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_value_steps_after * S ((S (S ff_i_ph_hd_only_other_pair_body_value_steps)) * ff_v_hd_only_other_pair) + (ff_current_ph_hd_only_other_pair_body_value_steps))) /\ ff_current_ph_hd_only_other_pair_body_value_steps = ff_previous_ph_hd_only_other_pair_body_value_steps * t + ff_coefficient_ph_hd_only_other_pair_body_value_steps)))))) /\ (((((exists fs_h_ph_hd_only_other_pair_body_derivative_start. fs_h_ph_hd_only_other_pair_body_derivative_start + S (0) = S ((S (0)) * ff_e_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_derivative_start. ff_d_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_derivative_start * S ((S (0)) * ff_e_hd_only_other_pair) + (0))) /\ ((((exists fs_h_ph_hd_only_other_pair_body_derivative_terminal. fs_h_ph_hd_only_other_pair_body_derivative_terminal + S (w) = S ((S (l)) * ff_e_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_derivative_terminal. ff_d_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_derivative_terminal * S ((S (l)) * ff_e_hd_only_other_pair) + (w))) /\ forall ff_i_ph_hd_only_other_pair_body_derivative_steps. (exists ph_bound_hd_only_other_pair_body_derivative_steps. ph_bound_hd_only_other_pair_body_derivative_steps + S ff_i_ph_hd_only_other_pair_body_derivative_steps = l) -> exists ff_coefficient_ph_hd_only_other_pair_body_derivative_steps ff_previous_ph_hd_only_other_pair_body_derivative_steps ff_current_ph_hd_only_other_pair_body_derivative_steps. ((((exists fs_h_ph_hd_only_other_pair_body_derivative_steps_coefficient. fs_h_ph_hd_only_other_pair_body_derivative_steps_coefficient + S (ff_coefficient_ph_hd_only_other_pair_body_derivative_steps) = S ((S (ff_i_ph_hd_only_other_pair_body_derivative_steps)) * ff_v_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_derivative_steps_coefficient. ff_u_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_derivative_steps_coefficient * S ((S (ff_i_ph_hd_only_other_pair_body_derivative_steps)) * ff_v_hd_only_other_pair) + (ff_coefficient_ph_hd_only_other_pair_body_derivative_steps))) /\ ((((exists fs_h_ph_hd_only_other_pair_body_derivative_steps_before. fs_h_ph_hd_only_other_pair_body_derivative_steps_before + S (ff_previous_ph_hd_only_other_pair_body_derivative_steps) = S ((S (ff_i_ph_hd_only_other_pair_body_derivative_steps)) * ff_e_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_derivative_steps_before. ff_d_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_derivative_steps_before * S ((S (ff_i_ph_hd_only_other_pair_body_derivative_steps)) * ff_e_hd_only_other_pair) + (ff_previous_ph_hd_only_other_pair_body_derivative_steps))) /\ ((((exists fs_h_ph_hd_only_other_pair_body_derivative_steps_after. fs_h_ph_hd_only_other_pair_body_derivative_steps_after + S (ff_current_ph_hd_only_other_pair_body_derivative_steps) = S ((S (S ff_i_ph_hd_only_other_pair_body_derivative_steps)) * ff_e_hd_only_other_pair)) /\ exists fs_q_ph_hd_only_other_pair_body_derivative_steps_after. ff_d_hd_only_other_pair = fs_q_ph_hd_only_other_pair_body_derivative_steps_after * S ((S (S ff_i_ph_hd_only_other_pair_body_derivative_steps)) * ff_e_hd_only_other_pair) + (ff_current_ph_hd_only_other_pair_body_derivative_steps))) /\ ff_current_ph_hd_only_other_pair_body_derivative_steps = ff_previous_ph_hd_only_other_pair_body_derivative_steps * t + ff_coefficient_ph_hd_only_other_pair_body_derivative_steps))))))))) -> z = w)

Constructive proof overview

Generated structural guide

Every beta-coded natural polynomial has one and only one exact formal derivative at every evaluation point.

The unchanged tactic script uses 2 declared prerequisites and contains 23 exact native proof lines.

Alpha v34 checked-use · first admitted v24 · independently kernel and Lean verified; not Stable

Proof neighborhood

Direct dependencies

Direct dependents

none

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

23 script commands · 8 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.

Named ingredients (2)
01Fix variables and assumptionsL1–4

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

  1. L1
    intro b
  2. L2
    intro c
  3. L3
    intro t
  4. L4
    intro l
02Use earlier factsL5–8

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

  1. L5
    specialize beta_horner_derivative_only_exists b
  2. L6
    specialize beta_horner_derivative_only_exists c
  3. L7
    specialize beta_horner_derivative_only_exists t
  4. L8
    specialize beta_horner_derivative_only_exists l
03Separate the logical casesL9–9

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

  1. L9
    cases beta_horner_derivative_only_exists
04Construct an explicit witnessL10–10

Supply the displayed value, then prove that it has the required property.

  1. L10
    exists x
05Separate the logical casesL11–11

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

  1. L11
    split
06Use earlier factsL12–12

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

  1. L12
    exact beta_horner_derivative_only_exists_witness
07Fix variables and assumptionsL13–14

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

  1. L13
    intro w
  2. L14
    intro hw
08Use earlier factsL15–23

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

  1. L15
    specialize beta_horner_derivative_only_functional b
  2. L16
    specialize beta_horner_derivative_only_functional c
  3. L17
    specialize beta_horner_derivative_only_functional t
  4. L18
    specialize beta_horner_derivative_only_functional l
  5. L19
    specialize beta_horner_derivative_only_functional x
  6. L20
    specialize beta_horner_derivative_only_functional w
  7. L21
    apply beta_horner_derivative_only_functional
  8. L22
    exact beta_horner_derivative_only_exists_witness
  9. L23
    exact hw

Library-wide reading audit

Original exact command ledger · 23 lines
  1. 0001intro b
  2. 0002intro c
  3. 0003intro t
  4. 0004intro l
  5. 0005specialize beta_horner_derivative_only_exists b
  6. 0006specialize beta_horner_derivative_only_exists c
  7. 0007specialize beta_horner_derivative_only_exists t
  8. 0008specialize beta_horner_derivative_only_exists l
  9. 0009cases beta_horner_derivative_only_exists
  10. 0010exists x
  11. 0011split
  12. 0012exact beta_horner_derivative_only_exists_witness
  13. 0013intro w
  14. 0014intro hw
  15. 0015specialize beta_horner_derivative_only_functional b
  16. 0016specialize beta_horner_derivative_only_functional c
  17. 0017specialize beta_horner_derivative_only_functional t
  18. 0018specialize beta_horner_derivative_only_functional l
  19. 0019specialize beta_horner_derivative_only_functional x
  20. 0020specialize beta_horner_derivative_only_functional w
  21. 0021apply beta_horner_derivative_only_functional
  22. 0022exact beta_horner_derivative_only_exists_witness
  23. 0023exact hw

Separate complete second-wave branches: Full G095 proof · Alpha v27.