HD0004

beta_horner_derivative_only_projection

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

A simultaneously evaluated polynomial pair yields an actual formal-derivative witness.

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 n z. (exists ff_u_hd_pair ff_v_hd_pair ff_d_hd_pair ff_e_hd_pair. ((((((exists fs_h_ph_hd_pair_body_value_start. fs_h_ph_hd_pair_body_value_start + S (0) = S ((S (0)) * ff_v_hd_pair)) /\ exists fs_q_ph_hd_pair_body_value_start. ff_u_hd_pair = fs_q_ph_hd_pair_body_value_start * S ((S (0)) * ff_v_hd_pair) + (0))) /\ ((((exists fs_h_ph_hd_pair_body_value_terminal. fs_h_ph_hd_pair_body_value_terminal + S (n) = S ((S (l)) * ff_v_hd_pair)) /\ exists fs_q_ph_hd_pair_body_value_terminal. ff_u_hd_pair = fs_q_ph_hd_pair_body_value_terminal * S ((S (l)) * ff_v_hd_pair) + (n))) /\ forall ff_i_ph_hd_pair_body_value_steps. (exists ph_bound_hd_pair_body_value_steps. ph_bound_hd_pair_body_value_steps + S ff_i_ph_hd_pair_body_value_steps = l) -> exists ff_coefficient_ph_hd_pair_body_value_steps ff_previous_ph_hd_pair_body_value_steps ff_current_ph_hd_pair_body_value_steps. ((((exists fs_h_ph_hd_pair_body_value_steps_coefficient. fs_h_ph_hd_pair_body_value_steps_coefficient + S (ff_coefficient_ph_hd_pair_body_value_steps) = S ((S (ff_i_ph_hd_pair_body_value_steps)) * c)) /\ exists fs_q_ph_hd_pair_body_value_steps_coefficient. b = fs_q_ph_hd_pair_body_value_steps_coefficient * S ((S (ff_i_ph_hd_pair_body_value_steps)) * c) + (ff_coefficient_ph_hd_pair_body_value_steps))) /\ ((((exists fs_h_ph_hd_pair_body_value_steps_before. fs_h_ph_hd_pair_body_value_steps_before + S (ff_previous_ph_hd_pair_body_value_steps) = S ((S (ff_i_ph_hd_pair_body_value_steps)) * ff_v_hd_pair)) /\ exists fs_q_ph_hd_pair_body_value_steps_before. ff_u_hd_pair = fs_q_ph_hd_pair_body_value_steps_before * S ((S (ff_i_ph_hd_pair_body_value_steps)) * ff_v_hd_pair) + (ff_previous_ph_hd_pair_body_value_steps))) /\ ((((exists fs_h_ph_hd_pair_body_value_steps_after. fs_h_ph_hd_pair_body_value_steps_after + S (ff_current_ph_hd_pair_body_value_steps) = S ((S (S ff_i_ph_hd_pair_body_value_steps)) * ff_v_hd_pair)) /\ exists fs_q_ph_hd_pair_body_value_steps_after. ff_u_hd_pair = fs_q_ph_hd_pair_body_value_steps_after * S ((S (S ff_i_ph_hd_pair_body_value_steps)) * ff_v_hd_pair) + (ff_current_ph_hd_pair_body_value_steps))) /\ ff_current_ph_hd_pair_body_value_steps = ff_previous_ph_hd_pair_body_value_steps * t + ff_coefficient_ph_hd_pair_body_value_steps)))))) /\ (((((exists fs_h_ph_hd_pair_body_derivative_start. fs_h_ph_hd_pair_body_derivative_start + S (0) = S ((S (0)) * ff_e_hd_pair)) /\ exists fs_q_ph_hd_pair_body_derivative_start. ff_d_hd_pair = fs_q_ph_hd_pair_body_derivative_start * S ((S (0)) * ff_e_hd_pair) + (0))) /\ ((((exists fs_h_ph_hd_pair_body_derivative_terminal. fs_h_ph_hd_pair_body_derivative_terminal + S (z) = S ((S (l)) * ff_e_hd_pair)) /\ exists fs_q_ph_hd_pair_body_derivative_terminal. ff_d_hd_pair = fs_q_ph_hd_pair_body_derivative_terminal * S ((S (l)) * ff_e_hd_pair) + (z))) /\ forall ff_i_ph_hd_pair_body_derivative_steps. (exists ph_bound_hd_pair_body_derivative_steps. ph_bound_hd_pair_body_derivative_steps + S ff_i_ph_hd_pair_body_derivative_steps = l) -> exists ff_coefficient_ph_hd_pair_body_derivative_steps ff_previous_ph_hd_pair_body_derivative_steps ff_current_ph_hd_pair_body_derivative_steps. ((((exists fs_h_ph_hd_pair_body_derivative_steps_coefficient. fs_h_ph_hd_pair_body_derivative_steps_coefficient + S (ff_coefficient_ph_hd_pair_body_derivative_steps) = S ((S (ff_i_ph_hd_pair_body_derivative_steps)) * ff_v_hd_pair)) /\ exists fs_q_ph_hd_pair_body_derivative_steps_coefficient. ff_u_hd_pair = fs_q_ph_hd_pair_body_derivative_steps_coefficient * S ((S (ff_i_ph_hd_pair_body_derivative_steps)) * ff_v_hd_pair) + (ff_coefficient_ph_hd_pair_body_derivative_steps))) /\ ((((exists fs_h_ph_hd_pair_body_derivative_steps_before. fs_h_ph_hd_pair_body_derivative_steps_before + S (ff_previous_ph_hd_pair_body_derivative_steps) = S ((S (ff_i_ph_hd_pair_body_derivative_steps)) * ff_e_hd_pair)) /\ exists fs_q_ph_hd_pair_body_derivative_steps_before. ff_d_hd_pair = fs_q_ph_hd_pair_body_derivative_steps_before * S ((S (ff_i_ph_hd_pair_body_derivative_steps)) * ff_e_hd_pair) + (ff_previous_ph_hd_pair_body_derivative_steps))) /\ ((((exists fs_h_ph_hd_pair_body_derivative_steps_after. fs_h_ph_hd_pair_body_derivative_steps_after + S (ff_current_ph_hd_pair_body_derivative_steps) = S ((S (S ff_i_ph_hd_pair_body_derivative_steps)) * ff_e_hd_pair)) /\ exists fs_q_ph_hd_pair_body_derivative_steps_after. ff_d_hd_pair = fs_q_ph_hd_pair_body_derivative_steps_after * S ((S (S ff_i_ph_hd_pair_body_derivative_steps)) * ff_e_hd_pair) + (ff_current_ph_hd_pair_body_derivative_steps))) /\ ff_current_ph_hd_pair_body_derivative_steps = ff_previous_ph_hd_pair_body_derivative_steps * t + ff_coefficient_ph_hd_pair_body_derivative_steps)))))))) -> (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)))))))))

Constructive proof overview

Generated structural guide

A simultaneously evaluated polynomial pair yields an actual formal-derivative witness.

The unchanged tactic script uses 0 declared prerequisites and contains 9 exact native proof lines.

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

Proof neighborhood

Direct dependencies

none

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

9 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 assumptionsL1–7

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
  5. L5
    intro n
  6. L6
    intro z
  7. L7
    intro hpair
02Construct an explicit witnessL8–8

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

  1. L8
    exists n
03Use earlier factsL9–9

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

  1. L9
    exact hpair

Library-wide reading audit

Original exact command ledger · 9 lines
  1. 0001intro b
  2. 0002intro c
  3. 0003intro t
  4. 0004intro l
  5. 0005intro n
  6. 0006intro z
  7. 0007intro hpair
  8. 0008exists n
  9. 0009exact hpair

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