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Mirrors > Home > MPE Home > Th. List > smores3 | Structured version Visualization version GIF version |
Description: A strictly monotone function restricted to an ordinal remains strictly monotone. (Contributed by Andrew Salmon, 19-Nov-2011.) |
Ref | Expression |
---|---|
smores3 | ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → Smo (𝐴 ↾ 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dmres 5902 | . . . . . 6 ⊢ dom (𝐴 ↾ 𝐵) = (𝐵 ∩ dom 𝐴) | |
2 | incom 4131 | . . . . . 6 ⊢ (𝐵 ∩ dom 𝐴) = (dom 𝐴 ∩ 𝐵) | |
3 | 1, 2 | eqtri 2766 | . . . . 5 ⊢ dom (𝐴 ↾ 𝐵) = (dom 𝐴 ∩ 𝐵) |
4 | 3 | eleq2i 2830 | . . . 4 ⊢ (𝐶 ∈ dom (𝐴 ↾ 𝐵) ↔ 𝐶 ∈ (dom 𝐴 ∩ 𝐵)) |
5 | smores 8154 | . . . 4 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ dom (𝐴 ↾ 𝐵)) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) | |
6 | 4, 5 | sylan2br 594 | . . 3 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵)) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) |
7 | 6 | 3adant3 1130 | . 2 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) |
8 | elinel2 4126 | . . . . 5 ⊢ (𝐶 ∈ (dom 𝐴 ∩ 𝐵) → 𝐶 ∈ 𝐵) | |
9 | ordelss 6267 | . . . . . 6 ⊢ ((Ord 𝐵 ∧ 𝐶 ∈ 𝐵) → 𝐶 ⊆ 𝐵) | |
10 | 9 | ancoms 458 | . . . . 5 ⊢ ((𝐶 ∈ 𝐵 ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
11 | 8, 10 | sylan 579 | . . . 4 ⊢ ((𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
12 | 11 | 3adant1 1128 | . . 3 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
13 | resabs1 5910 | . . 3 ⊢ (𝐶 ⊆ 𝐵 → ((𝐴 ↾ 𝐵) ↾ 𝐶) = (𝐴 ↾ 𝐶)) | |
14 | smoeq 8152 | . . 3 ⊢ (((𝐴 ↾ 𝐵) ↾ 𝐶) = (𝐴 ↾ 𝐶) → (Smo ((𝐴 ↾ 𝐵) ↾ 𝐶) ↔ Smo (𝐴 ↾ 𝐶))) | |
15 | 12, 13, 14 | 3syl 18 | . 2 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → (Smo ((𝐴 ↾ 𝐵) ↾ 𝐶) ↔ Smo (𝐴 ↾ 𝐶))) |
16 | 7, 15 | mpbid 231 | 1 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → Smo (𝐴 ↾ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ∩ cin 3882 ⊆ wss 3883 dom cdm 5580 ↾ cres 5582 Ord word 6250 Smo wsmo 8147 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-clab 2716 df-cleq 2730 df-clel 2817 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-tr 5188 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ord 6254 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-fv 6426 df-smo 8148 |
This theorem is referenced by: (None) |
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