BT0080

pow_exists

Stable ยท empty-context checked

Every base and exponent have a relational finite-product power.

Exact expanded PA statement

forall a e. exists n. (exists ff_b_x ff_c_x. ((forall ff_i_x_repeat. (exists ff_lt_x_repeat_bound. ff_lt_x_repeat_bound + S ff_i_x_repeat = e) -> (((exists ff_h_x_repeat_decoded. ff_h_x_repeat_decoded + S (a) = S ((S (ff_i_x_repeat)) * ff_c_x)) /\ exists ff_q_x_repeat_decoded. ff_b_x = ff_q_x_repeat_decoded * S ((S (ff_i_x_repeat)) * ff_c_x) + (a)))) /\ (exists ff_u_x_product ff_v_x_product. ((((exists ff_h_x_product_start. ff_h_x_product_start + S (1) = S ((S (0)) * ff_v_x_product)) /\ exists ff_q_x_product_start. ff_u_x_product = ff_q_x_product_start * S ((S (0)) * ff_v_x_product) + (1))) /\ ((((exists ff_h_x_product_terminal. ff_h_x_product_terminal + S (n) = S ((S (e)) * ff_v_x_product)) /\ exists ff_q_x_product_terminal. ff_u_x_product = ff_q_x_product_terminal * S ((S (e)) * ff_v_x_product) + (n))) /\ forall ff_i_x_product. (exists ff_lt_x_product_bound. ff_lt_x_product_bound + S ff_i_x_product = e) -> exists ff_p_x_product ff_r_x_product ff_s_x_product. ((((exists ff_h_x_product_factor. ff_h_x_product_factor + S (ff_p_x_product) = S ((S (ff_i_x_product)) * ff_c_x)) /\ exists ff_q_x_product_factor. ff_b_x = ff_q_x_product_factor * S ((S (ff_i_x_product)) * ff_c_x) + (ff_p_x_product))) /\ ((((exists ff_h_x_product_partial. ff_h_x_product_partial + S (ff_r_x_product) = S ((S (ff_i_x_product)) * ff_v_x_product)) /\ exists ff_q_x_product_partial. ff_u_x_product = ff_q_x_product_partial * S ((S (ff_i_x_product)) * ff_v_x_product) + (ff_r_x_product))) /\ ((((exists ff_h_x_product_successor. ff_h_x_product_successor + S (ff_s_x_product) = S ((S (S ff_i_x_product)) * ff_v_x_product)) /\ exists ff_q_x_product_successor. ff_u_x_product = ff_q_x_product_successor * S ((S (S ff_i_x_product)) * ff_v_x_product) + (ff_s_x_product))) /\ ff_s_x_product = ff_r_x_product * ff_p_x_product))))))))

Structural proof guide

Every base and exponent have a relational finite-product power.

Direct prerequisites: beta_repeat_exists, beta_product_exists. The authored body proceeds by case analysis (5), intermediate claims (1).

Proof neighborhood

Direct dependencies

Direct dependents

Formal native tactic body

Dependencies are hypotheses of this body receipt. The focused endpoint audits separately check the complete empty-context certificates.

  1. 0001intro a
  2. 0002intro e
  3. 0003have hrepeat : exists b c. (forall i. (exists h. h + S i = e) -> ((exists h. h + S a = S ((S i) * c)) /\ exists q. b = q * S ((S i) * c) + a))
  4. 0004specialize beta_repeat_exists a
  5. 0005specialize beta_repeat_exists e
  6. 0006exact beta_repeat_exists
  7. 0007cases hrepeat
  8. 0008cases hrepeat_witness
  9. 0009specialize beta_product_exists x
  10. 0010specialize beta_product_exists x1
  11. 0011specialize beta_product_exists e
  12. 0012cases beta_product_exists
  13. 0013cases beta_product_exists_witness
  14. 0014cases beta_product_exists_witness_witness
  15. 0015exists x2
  16. 0016exists x
  17. 0017exists x1
  18. 0018split
  19. 0019exact hrepeat_witness_witness
  20. 0020exists x3
  21. 0021exists x4
  22. 0022exact beta_product_exists_witness_witness_witness