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Mirrors > Home > ILE Home > Th. List > ltordlem | GIF version |
Description: Lemma for eqord1 8453. (Contributed by Mario Carneiro, 14-Jun-2014.) |
Ref | Expression |
---|---|
ltord.1 | ⊢ (𝑥 = 𝑦 → 𝐴 = 𝐵) |
ltord.2 | ⊢ (𝑥 = 𝐶 → 𝐴 = 𝑀) |
ltord.3 | ⊢ (𝑥 = 𝐷 → 𝐴 = 𝑁) |
ltord.4 | ⊢ 𝑆 ⊆ ℝ |
ltord.5 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑆) → 𝐴 ∈ ℝ) |
ltord.6 | ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 < 𝑦 → 𝐴 < 𝐵)) |
Ref | Expression |
---|---|
ltordlem | ⊢ ((𝜑 ∧ (𝐶 ∈ 𝑆 ∧ 𝐷 ∈ 𝑆)) → (𝐶 < 𝐷 → 𝑀 < 𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ltord.6 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 < 𝑦 → 𝐴 < 𝐵)) | |
2 | 1 | ralrimivva 2569 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 (𝑥 < 𝑦 → 𝐴 < 𝐵)) |
3 | breq1 4018 | . . . 4 ⊢ (𝑥 = 𝐶 → (𝑥 < 𝑦 ↔ 𝐶 < 𝑦)) | |
4 | ltord.2 | . . . . 5 ⊢ (𝑥 = 𝐶 → 𝐴 = 𝑀) | |
5 | 4 | breq1d 4025 | . . . 4 ⊢ (𝑥 = 𝐶 → (𝐴 < 𝐵 ↔ 𝑀 < 𝐵)) |
6 | 3, 5 | imbi12d 234 | . . 3 ⊢ (𝑥 = 𝐶 → ((𝑥 < 𝑦 → 𝐴 < 𝐵) ↔ (𝐶 < 𝑦 → 𝑀 < 𝐵))) |
7 | breq2 4019 | . . . 4 ⊢ (𝑦 = 𝐷 → (𝐶 < 𝑦 ↔ 𝐶 < 𝐷)) | |
8 | eqeq1 2194 | . . . . . . 7 ⊢ (𝑥 = 𝑦 → (𝑥 = 𝐷 ↔ 𝑦 = 𝐷)) | |
9 | ltord.1 | . . . . . . . 8 ⊢ (𝑥 = 𝑦 → 𝐴 = 𝐵) | |
10 | 9 | eqeq1d 2196 | . . . . . . 7 ⊢ (𝑥 = 𝑦 → (𝐴 = 𝑁 ↔ 𝐵 = 𝑁)) |
11 | 8, 10 | imbi12d 234 | . . . . . 6 ⊢ (𝑥 = 𝑦 → ((𝑥 = 𝐷 → 𝐴 = 𝑁) ↔ (𝑦 = 𝐷 → 𝐵 = 𝑁))) |
12 | ltord.3 | . . . . . 6 ⊢ (𝑥 = 𝐷 → 𝐴 = 𝑁) | |
13 | 11, 12 | chvarv 1947 | . . . . 5 ⊢ (𝑦 = 𝐷 → 𝐵 = 𝑁) |
14 | 13 | breq2d 4027 | . . . 4 ⊢ (𝑦 = 𝐷 → (𝑀 < 𝐵 ↔ 𝑀 < 𝑁)) |
15 | 7, 14 | imbi12d 234 | . . 3 ⊢ (𝑦 = 𝐷 → ((𝐶 < 𝑦 → 𝑀 < 𝐵) ↔ (𝐶 < 𝐷 → 𝑀 < 𝑁))) |
16 | 6, 15 | rspc2v 2866 | . 2 ⊢ ((𝐶 ∈ 𝑆 ∧ 𝐷 ∈ 𝑆) → (∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 (𝑥 < 𝑦 → 𝐴 < 𝐵) → (𝐶 < 𝐷 → 𝑀 < 𝑁))) |
17 | 2, 16 | mpan9 281 | 1 ⊢ ((𝜑 ∧ (𝐶 ∈ 𝑆 ∧ 𝐷 ∈ 𝑆)) → (𝐶 < 𝐷 → 𝑀 < 𝑁)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 = wceq 1363 ∈ wcel 2158 ∀wral 2465 ⊆ wss 3141 class class class wbr 4015 ℝcr 7823 < clt 8005 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1457 ax-7 1458 ax-gen 1459 ax-ie1 1503 ax-ie2 1504 ax-8 1514 ax-10 1515 ax-11 1516 ax-i12 1517 ax-bndl 1519 ax-4 1520 ax-17 1536 ax-i9 1540 ax-ial 1544 ax-i5r 1545 ax-ext 2169 |
This theorem depends on definitions: df-bi 117 df-3an 981 df-tru 1366 df-nf 1471 df-sb 1773 df-clab 2174 df-cleq 2180 df-clel 2183 df-nfc 2318 df-ral 2470 df-v 2751 df-un 3145 df-sn 3610 df-pr 3611 df-op 3613 df-br 4016 |
This theorem is referenced by: eqord1 8453 |
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