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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 5858 | . . . . . 6 ⊢ dom (𝐴 ↾ 𝐵) = (𝐵 ∩ dom 𝐴) | |
2 | incom 4101 | . . . . . 6 ⊢ (𝐵 ∩ dom 𝐴) = (dom 𝐴 ∩ 𝐵) | |
3 | 1, 2 | eqtri 2759 | . . . . 5 ⊢ dom (𝐴 ↾ 𝐵) = (dom 𝐴 ∩ 𝐵) |
4 | 3 | eleq2i 2822 | . . . 4 ⊢ (𝐶 ∈ dom (𝐴 ↾ 𝐵) ↔ 𝐶 ∈ (dom 𝐴 ∩ 𝐵)) |
5 | smores 8067 | . . . 4 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ dom (𝐴 ↾ 𝐵)) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) | |
6 | 4, 5 | sylan2br 598 | . . 3 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵)) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) |
7 | 6 | 3adant3 1134 | . 2 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → Smo ((𝐴 ↾ 𝐵) ↾ 𝐶)) |
8 | elinel2 4096 | . . . . 5 ⊢ (𝐶 ∈ (dom 𝐴 ∩ 𝐵) → 𝐶 ∈ 𝐵) | |
9 | ordelss 6207 | . . . . . 6 ⊢ ((Ord 𝐵 ∧ 𝐶 ∈ 𝐵) → 𝐶 ⊆ 𝐵) | |
10 | 9 | ancoms 462 | . . . . 5 ⊢ ((𝐶 ∈ 𝐵 ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
11 | 8, 10 | sylan 583 | . . . 4 ⊢ ((𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
12 | 11 | 3adant1 1132 | . . 3 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → 𝐶 ⊆ 𝐵) |
13 | resabs1 5866 | . . 3 ⊢ (𝐶 ⊆ 𝐵 → ((𝐴 ↾ 𝐵) ↾ 𝐶) = (𝐴 ↾ 𝐶)) | |
14 | smoeq 8065 | . . 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 235 | 1 ⊢ ((Smo (𝐴 ↾ 𝐵) ∧ 𝐶 ∈ (dom 𝐴 ∩ 𝐵) ∧ Ord 𝐵) → Smo (𝐴 ↾ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ w3a 1089 = wceq 1543 ∈ wcel 2112 ∩ cin 3852 ⊆ wss 3853 dom cdm 5536 ↾ cres 5538 Ord word 6190 Smo wsmo 8060 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ne 2933 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-uni 4806 df-br 5040 df-opab 5102 df-tr 5147 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ord 6194 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-fv 6366 df-smo 8061 |
This theorem is referenced by: (None) |
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