EU001D

euler_coprime_weighted_product_cancel

Public research checkpoint, not admitted to Alpha or Stable. Alpha v30 remains 3222 checked-use theorems; Stable remains 432. The on-demand Alpha Lean service does not yet expose these checkpoint theorems; their independently checked literal bundles and unchanged sources are available below.

Public research checkpoint: original HA and independently compiled Lean verified; not Alpha-enrolled, no Alpha checked-use authority; not Stable

Cancel the proved coprime finite product in a balanced congruence, including the valid modulus-one case.

Exact expanded first-order arithmetic statement

forall m P w. ~(m=0) -> (forall eut_divisor_eu_cancel_product. (exists eut_left_eu_cancel_product. (P) = eut_divisor_eu_cancel_product * eut_left_eu_cancel_product) -> (exists eut_right_eu_cancel_product. (m) = eut_divisor_eu_cancel_product * eut_right_eu_cancel_product) -> eut_divisor_eu_cancel_product = 1) -> (exists eu_mod_left_cancel_balance eu_mod_right_cancel_balance. (w*P) + (m) * eu_mod_left_cancel_balance = (P) + (m) * eu_mod_right_cancel_balance) -> (exists eu_mod_left_cancel_result eu_mod_right_cancel_result. (w) + (m) * eu_mod_left_cancel_result = (1) + (m) * eu_mod_right_cancel_result)

Constructive proof overview

Generated structural guide

Cancel the proved coprime finite product in a balanced congruence, including the valid modulus-one case.

The unchanged tactic script uses 3 declared prerequisites and contains 23 exact native proof lines.

Public research checkpoint: original HA and independently compiled Lean verified; not Alpha-enrolled, no Alpha checked-use authority; not Stable

Proof neighborhood

Direct dependencies

mod_eq_cancel_coprime Alpha theorem; checked-use authorized mul_comm Alpha theorem; checked-use authorized mul_one Alpha theorem; checked-use authorized

Direct dependents

EU001F euler_coprime_totient_power_value

Formal native tactic body

Dependencies are introduced as named hypotheses before line 1. Local theorem links identify exact declared prerequisites. The literal dependency-closed bundle is checked by original HA and the independently compiled Lean verifier. Public delivery grants no Alpha checked-use authority or Stable membership.

Read the argument

Proof checkpoints

23 script commands · 4 reading checkpoints · 2 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 assumptionsL1–6

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

  1. L1
    intro m
  2. L2
    intro P
  3. L3
    intro w
  4. L4
    intro hm
  5. L5
    intro hP
  6. L6
    intro hmod
02Use earlier factsL7–13

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

  1. L7
    specialize mod_eq_cancel_coprime (m)
  2. L8
    specialize mod_eq_cancel_coprime (P)
  3. L9
    specialize mod_eq_cancel_coprime (w)
  4. L10
    specialize mod_eq_cancel_coprime (1)
  5. L11
    apply mod_eq_cancel_coprime
  6. L12
    exact hm
  7. L13
    exact hP
03Establish hleftL14–17

Establish this local claim before using it. It is not an additional assumption. The following proof commands apply mul comm.

  1. L14
    have hleft : P*w=w*P
  2. L15
    specialize mul_comm (P)
  3. L16
    specialize mul_comm (w)
  4. L17
    apply mul_comm
04Establish hrightL18–23

Establish this local claim before using it. It is not an additional assumption. The following proof commands apply mul one.

  1. L18
    have hright : P*1=P
  2. L19
    specialize mul_one (P)
  3. L20
    apply mul_one
  4. L21
    rewrite hleft
  5. L22
    rewrite hright
  6. L23
    exact hmod

Library-wide reading audit

Original exact command ledger · 23 lines
  1. 0001intro m
  2. 0002intro P
  3. 0003intro w
  4. 0004intro hm
  5. 0005intro hP
  6. 0006intro hmod
  7. 0007specialize mod_eq_cancel_coprime (m)
  8. 0008specialize mod_eq_cancel_coprime (P)
  9. 0009specialize mod_eq_cancel_coprime (w)
  10. 0010specialize mod_eq_cancel_coprime (1)
  11. 0011apply mod_eq_cancel_coprime
  12. 0012exact hm
  13. 0013exact hP
  14. 0014have hleft : P*w=w*P
  15. 0015specialize mul_comm (P)
  16. 0016specialize mul_comm (w)
  17. 0017apply mul_comm
  18. 0018have hright : P*1=P
  19. 0019specialize mul_one (P)
  20. 0020apply mul_one
  21. 0021rewrite hleft
  22. 0022rewrite hright
  23. 0023exact hmod