Proof of Theorem eliccelico
| Step | Hyp | Ref
| Expression |
| 1 | | simpl1 1191 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐴 ∈
ℝ*) |
| 2 | | simpl2 1192 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐵 ∈
ℝ*) |
| 3 | | simprl 770 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ∈ (𝐴[,]𝐵)) |
| 4 | | elicc1 13413 |
. . . . . . . 8
⊢ ((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))) |
| 5 | 4 | biimpa 476 |
. . . . . . 7
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)) |
| 6 | 5 | simp1d 1142 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ∈
ℝ*) |
| 7 | 1, 2, 3, 6 | syl21anc 837 |
. . . . 5
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ∈
ℝ*) |
| 8 | 5 | simp3d 1144 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ≤ 𝐵) |
| 9 | 1, 2, 3, 8 | syl21anc 837 |
. . . . 5
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ≤ 𝐵) |
| 10 | 1, 2 | jca 511 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → (𝐴 ∈ ℝ* ∧ 𝐵 ∈
ℝ*)) |
| 11 | | simprr 772 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → ¬ 𝐶 ∈ (𝐴[,)𝐵)) |
| 12 | 5 | simp2d 1143 |
. . . . . . 7
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐴 ≤ 𝐶) |
| 13 | 10, 3, 12 | syl2anc 584 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐴 ≤ 𝐶) |
| 14 | | elico1 13412 |
. . . . . . . . . 10
⊢ ((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) → (𝐶 ∈ (𝐴[,)𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵))) |
| 15 | 14 | notbid 318 |
. . . . . . . . 9
⊢ ((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) → (¬ 𝐶 ∈ (𝐴[,)𝐵) ↔ ¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵))) |
| 16 | 15 | biimpa 476 |
. . . . . . . 8
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → ¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵)) |
| 17 | | df-3an 1088 |
. . . . . . . . . 10
⊢ ((𝐶 ∈ ℝ*
∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵)) |
| 18 | 17 | notbii 320 |
. . . . . . . . 9
⊢ (¬
(𝐶 ∈
ℝ* ∧ 𝐴
≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ¬ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵)) |
| 19 | | imnan 399 |
. . . . . . . . 9
⊢ (((𝐶 ∈ ℝ*
∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵) ↔ ¬ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵)) |
| 20 | 18, 19 | bitr4i 278 |
. . . . . . . 8
⊢ (¬
(𝐶 ∈
ℝ* ∧ 𝐴
≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵)) |
| 21 | 16, 20 | sylib 218 |
. . . . . . 7
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵)) |
| 22 | 21 | imp 406 |
. . . . . 6
⊢ ((((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) ∧ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶)) → ¬ 𝐶 < 𝐵) |
| 23 | 10, 11, 7, 13, 22 | syl22anc 838 |
. . . . 5
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → ¬ 𝐶 < 𝐵) |
| 24 | | xeqlelt 32717 |
. . . . . 6
⊢ ((𝐶 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) → (𝐶 = 𝐵 ↔ (𝐶 ≤ 𝐵 ∧ ¬ 𝐶 < 𝐵))) |
| 25 | 24 | biimpar 477 |
. . . . 5
⊢ (((𝐶 ∈ ℝ*
∧ 𝐵 ∈
ℝ*) ∧ (𝐶 ≤ 𝐵 ∧ ¬ 𝐶 < 𝐵)) → 𝐶 = 𝐵) |
| 26 | 7, 2, 9, 23, 25 | syl22anc 838 |
. . . 4
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 = 𝐵) |
| 27 | 26 | ex 412 |
. . 3
⊢ ((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) → ((𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 = 𝐵)) |
| 28 | | pm5.6 1003 |
. . 3
⊢ (((𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 = 𝐵) ↔ (𝐶 ∈ (𝐴[,]𝐵) → (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵))) |
| 29 | 27, 28 | sylib 218 |
. 2
⊢ ((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) → (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵))) |
| 30 | | icossicc 13458 |
. . . . 5
⊢ (𝐴[,)𝐵) ⊆ (𝐴[,]𝐵) |
| 31 | | simpr 484 |
. . . . 5
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 ∈ (𝐴[,)𝐵)) |
| 32 | 30, 31 | sselid 3961 |
. . . 4
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 ∈ (𝐴[,]𝐵)) |
| 33 | | simpr 484 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 = 𝐵) |
| 34 | | simpl2 1192 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐵 ∈
ℝ*) |
| 35 | 33, 34 | eqeltrd 2833 |
. . . . 5
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ∈
ℝ*) |
| 36 | | simpl3 1193 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ≤ 𝐵) |
| 37 | 36, 33 | breqtrrd 5151 |
. . . . 5
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ≤ 𝐶) |
| 38 | 34 | xrleidd 13176 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐵 ≤ 𝐵) |
| 39 | 33, 38 | eqbrtrd 5145 |
. . . . 5
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ≤ 𝐵) |
| 40 | | simpl1 1191 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ∈
ℝ*) |
| 41 | 40, 34, 4 | syl2anc 584 |
. . . . 5
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))) |
| 42 | 35, 37, 39, 41 | mpbir3and 1342 |
. . . 4
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ∈ (𝐴[,]𝐵)) |
| 43 | 32, 42 | jaodan 959 |
. . 3
⊢ (((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)) → 𝐶 ∈ (𝐴[,]𝐵)) |
| 44 | 43 | ex 412 |
. 2
⊢ ((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) → ((𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵) → 𝐶 ∈ (𝐴[,]𝐵))) |
| 45 | 29, 44 | impbid 212 |
1
⊢ ((𝐴 ∈ ℝ*
∧ 𝐵 ∈
ℝ* ∧ 𝐴
≤ 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵))) |