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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 5913 | . . . . . 6 ⊢ dom (𝐴 ↾ 𝐵) = (𝐵 ∩ dom 𝐴) | |
2 | incom 4135 | . . . . . 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 8183 | . . . 4 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ dom (𝐴 ↾ 𝐵)) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) | |
6 | 4, 5 | sylan2br 595 | . . 3 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵)) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) |
7 | 6 | 3adant3 1131 | . 2 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) |
8 | elinel2 4130 | . . . . 5 ⊢ (𝐶 ∈ (dom 𝐴 ∩ 𝐵) → 𝐶 ∈ 𝐵) | |
9 | ordelss 6282 | . . . . . 6 ⊢ ((Ord 𝐵 ∧ 𝐶 ∈ 𝐵) → 𝐶 ⊆ 𝐵) | |
10 | 9 | ancoms 459 | . . . . 5 ⊢ ((𝐶 ∈ 𝐵 ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
11 | 8, 10 | sylan 580 | . . . 4 ⊢ ((𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
12 | 11 | 3adant1 1129 | . . 3 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
13 | resabs1 5921 | . . 3 ⊢ (𝐶 ⊆ 𝐵 → ((𝐴 ↾ 𝐵) ↾ 𝐶) = (𝐴 ↾ 𝐶)) | |
14 | smoeq 8181 | . . 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 1086 = wceq 1539 ∈ wcel 2106 ∩ cin 3886 ⊆ wss 3887 dom cdm 5589 ↾ cres 5591 Ord word 6265 Smo wsmo 8176 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pr 5352 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-clab 2716 df-cleq 2730 df-clel 2816 df-ne 2944 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-tr 5192 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ord 6269 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-fv 6441 df-smo 8177 |
This theorem is referenced by: (None) |
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