Proof of Theorem ballotlem4
| Step | Hyp | Ref
| Expression |
| 1 | | ballotth.m |
. . . . . . . 8
⊢ 𝑀 ∈ ℕ |
| 2 | | ballotth.n |
. . . . . . . 8
⊢ 𝑁 ∈ ℕ |
| 3 | | nnaddcl 12263 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑀 + 𝑁) ∈ ℕ) |
| 4 | 1, 2, 3 | mp2an 692 |
. . . . . . 7
⊢ (𝑀 + 𝑁) ∈ ℕ |
| 5 | | elnnuz 12896 |
. . . . . . 7
⊢ ((𝑀 + 𝑁) ∈ ℕ ↔ (𝑀 + 𝑁) ∈
(ℤ≥‘1)) |
| 6 | 4, 5 | mpbi 230 |
. . . . . 6
⊢ (𝑀 + 𝑁) ∈
(ℤ≥‘1) |
| 7 | | eluzfz1 13548 |
. . . . . 6
⊢ ((𝑀 + 𝑁) ∈ (ℤ≥‘1)
→ 1 ∈ (1...(𝑀 +
𝑁))) |
| 8 | 6, 7 | ax-mp 5 |
. . . . 5
⊢ 1 ∈
(1...(𝑀 + 𝑁)) |
| 9 | | 0le1 11760 |
. . . . . . . . . 10
⊢ 0 ≤
1 |
| 10 | | 0re 11237 |
. . . . . . . . . . 11
⊢ 0 ∈
ℝ |
| 11 | | 1re 11235 |
. . . . . . . . . . 11
⊢ 1 ∈
ℝ |
| 12 | 10, 11 | lenlti 11355 |
. . . . . . . . . 10
⊢ (0 ≤ 1
↔ ¬ 1 < 0) |
| 13 | 9, 12 | mpbi 230 |
. . . . . . . . 9
⊢ ¬ 1
< 0 |
| 14 | | ltsub13 11718 |
. . . . . . . . . . 11
⊢ ((0
∈ ℝ ∧ 0 ∈ ℝ ∧ 1 ∈ ℝ) → (0 < (0
− 1) ↔ 1 < (0 − 0))) |
| 15 | 10, 10, 11, 14 | mp3an 1463 |
. . . . . . . . . 10
⊢ (0 <
(0 − 1) ↔ 1 < (0 − 0)) |
| 16 | | 0m0e0 12360 |
. . . . . . . . . . 11
⊢ (0
− 0) = 0 |
| 17 | 16 | breq2i 5127 |
. . . . . . . . . 10
⊢ (1 <
(0 − 0) ↔ 1 < 0) |
| 18 | 15, 17 | bitri 275 |
. . . . . . . . 9
⊢ (0 <
(0 − 1) ↔ 1 < 0) |
| 19 | 13, 18 | mtbir 323 |
. . . . . . . 8
⊢ ¬ 0
< (0 − 1) |
| 20 | | 1m1e0 12312 |
. . . . . . . . . . . 12
⊢ (1
− 1) = 0 |
| 21 | 20 | fveq2i 6879 |
. . . . . . . . . . 11
⊢ ((𝐹‘𝐶)‘(1 − 1)) = ((𝐹‘𝐶)‘0) |
| 22 | | ballotth.o |
. . . . . . . . . . . 12
⊢ 𝑂 = {𝑐 ∈ 𝒫 (1...(𝑀 + 𝑁)) ∣ (♯‘𝑐) = 𝑀} |
| 23 | | ballotth.p |
. . . . . . . . . . . 12
⊢ 𝑃 = (𝑥 ∈ 𝒫 𝑂 ↦ ((♯‘𝑥) / (♯‘𝑂))) |
| 24 | | ballotth.f |
. . . . . . . . . . . 12
⊢ 𝐹 = (𝑐 ∈ 𝑂 ↦ (𝑖 ∈ ℤ ↦
((♯‘((1...𝑖)
∩ 𝑐)) −
(♯‘((1...𝑖)
∖ 𝑐))))) |
| 25 | 1, 2, 22, 23, 24 | ballotlemfval0 34528 |
. . . . . . . . . . 11
⊢ (𝐶 ∈ 𝑂 → ((𝐹‘𝐶)‘0) = 0) |
| 26 | 21, 25 | eqtrid 2782 |
. . . . . . . . . 10
⊢ (𝐶 ∈ 𝑂 → ((𝐹‘𝐶)‘(1 − 1)) = 0) |
| 27 | 26 | oveq1d 7420 |
. . . . . . . . 9
⊢ (𝐶 ∈ 𝑂 → (((𝐹‘𝐶)‘(1 − 1)) − 1) = (0
− 1)) |
| 28 | 27 | breq2d 5131 |
. . . . . . . 8
⊢ (𝐶 ∈ 𝑂 → (0 < (((𝐹‘𝐶)‘(1 − 1)) − 1) ↔ 0
< (0 − 1))) |
| 29 | 19, 28 | mtbiri 327 |
. . . . . . 7
⊢ (𝐶 ∈ 𝑂 → ¬ 0 < (((𝐹‘𝐶)‘(1 − 1)) −
1)) |
| 30 | 29 | adantr 480 |
. . . . . 6
⊢ ((𝐶 ∈ 𝑂 ∧ ¬ 1 ∈ 𝐶) → ¬ 0 < (((𝐹‘𝐶)‘(1 − 1)) −
1)) |
| 31 | | simpl 482 |
. . . . . . . . . . 11
⊢ ((𝐶 ∈ 𝑂 ∧ 1 ∈ (1...(𝑀 + 𝑁))) → 𝐶 ∈ 𝑂) |
| 32 | | 1nn 12251 |
. . . . . . . . . . . 12
⊢ 1 ∈
ℕ |
| 33 | 32 | a1i 11 |
. . . . . . . . . . 11
⊢ ((𝐶 ∈ 𝑂 ∧ 1 ∈ (1...(𝑀 + 𝑁))) → 1 ∈
ℕ) |
| 34 | 1, 2, 22, 23, 24, 31, 33 | ballotlemfp1 34524 |
. . . . . . . . . 10
⊢ ((𝐶 ∈ 𝑂 ∧ 1 ∈ (1...(𝑀 + 𝑁))) → ((¬ 1 ∈ 𝐶 → ((𝐹‘𝐶)‘1) = (((𝐹‘𝐶)‘(1 − 1)) − 1)) ∧ (1
∈ 𝐶 → ((𝐹‘𝐶)‘1) = (((𝐹‘𝐶)‘(1 − 1)) +
1)))) |
| 35 | 34 | simpld 494 |
. . . . . . . . 9
⊢ ((𝐶 ∈ 𝑂 ∧ 1 ∈ (1...(𝑀 + 𝑁))) → (¬ 1 ∈ 𝐶 → ((𝐹‘𝐶)‘1) = (((𝐹‘𝐶)‘(1 − 1)) −
1))) |
| 36 | 8, 35 | mpan2 691 |
. . . . . . . 8
⊢ (𝐶 ∈ 𝑂 → (¬ 1 ∈ 𝐶 → ((𝐹‘𝐶)‘1) = (((𝐹‘𝐶)‘(1 − 1)) −
1))) |
| 37 | 36 | imp 406 |
. . . . . . 7
⊢ ((𝐶 ∈ 𝑂 ∧ ¬ 1 ∈ 𝐶) → ((𝐹‘𝐶)‘1) = (((𝐹‘𝐶)‘(1 − 1)) −
1)) |
| 38 | 37 | breq2d 5131 |
. . . . . 6
⊢ ((𝐶 ∈ 𝑂 ∧ ¬ 1 ∈ 𝐶) → (0 < ((𝐹‘𝐶)‘1) ↔ 0 < (((𝐹‘𝐶)‘(1 − 1)) −
1))) |
| 39 | 30, 38 | mtbird 325 |
. . . . 5
⊢ ((𝐶 ∈ 𝑂 ∧ ¬ 1 ∈ 𝐶) → ¬ 0 < ((𝐹‘𝐶)‘1)) |
| 40 | | fveq2 6876 |
. . . . . . . 8
⊢ (𝑖 = 1 → ((𝐹‘𝐶)‘𝑖) = ((𝐹‘𝐶)‘1)) |
| 41 | 40 | breq2d 5131 |
. . . . . . 7
⊢ (𝑖 = 1 → (0 < ((𝐹‘𝐶)‘𝑖) ↔ 0 < ((𝐹‘𝐶)‘1))) |
| 42 | 41 | notbid 318 |
. . . . . 6
⊢ (𝑖 = 1 → (¬ 0 <
((𝐹‘𝐶)‘𝑖) ↔ ¬ 0 < ((𝐹‘𝐶)‘1))) |
| 43 | 42 | rspcev 3601 |
. . . . 5
⊢ ((1
∈ (1...(𝑀 + 𝑁)) ∧ ¬ 0 < ((𝐹‘𝐶)‘1)) → ∃𝑖 ∈ (1...(𝑀 + 𝑁)) ¬ 0 < ((𝐹‘𝐶)‘𝑖)) |
| 44 | 8, 39, 43 | sylancr 587 |
. . . 4
⊢ ((𝐶 ∈ 𝑂 ∧ ¬ 1 ∈ 𝐶) → ∃𝑖 ∈ (1...(𝑀 + 𝑁)) ¬ 0 < ((𝐹‘𝐶)‘𝑖)) |
| 45 | | rexnal 3089 |
. . . 4
⊢
(∃𝑖 ∈
(1...(𝑀 + 𝑁)) ¬ 0 < ((𝐹‘𝐶)‘𝑖) ↔ ¬ ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝐶)‘𝑖)) |
| 46 | 44, 45 | sylib 218 |
. . 3
⊢ ((𝐶 ∈ 𝑂 ∧ ¬ 1 ∈ 𝐶) → ¬ ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝐶)‘𝑖)) |
| 47 | | ballotth.e |
. . . . 5
⊢ 𝐸 = {𝑐 ∈ 𝑂 ∣ ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝑐)‘𝑖)} |
| 48 | 1, 2, 22, 23, 24, 47 | ballotleme 34529 |
. . . 4
⊢ (𝐶 ∈ 𝐸 ↔ (𝐶 ∈ 𝑂 ∧ ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝐶)‘𝑖))) |
| 49 | 48 | simprbi 496 |
. . 3
⊢ (𝐶 ∈ 𝐸 → ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝐶)‘𝑖)) |
| 50 | 46, 49 | nsyl 140 |
. 2
⊢ ((𝐶 ∈ 𝑂 ∧ ¬ 1 ∈ 𝐶) → ¬ 𝐶 ∈ 𝐸) |
| 51 | 50 | ex 412 |
1
⊢ (𝐶 ∈ 𝑂 → (¬ 1 ∈ 𝐶 → ¬ 𝐶 ∈ 𝐸)) |