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Mirrors > Home > ILE Home > Th. List > elmapssres | GIF version |
Description: A restricted mapping is a mapping. (Contributed by Stefan O'Rear, 9-Oct-2014.) (Revised by Mario Carneiro, 5-May-2015.) |
Ref | Expression |
---|---|
elmapssres | ⊢ ((𝐴 ∈ (𝐵 ↑𝑚 𝐶) ∧ 𝐷 ⊆ 𝐶) → (𝐴 ↾ 𝐷) ∈ (𝐵 ↑𝑚 𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elmapi 6516 | . . 3 ⊢ (𝐴 ∈ (𝐵 ↑𝑚 𝐶) → 𝐴:𝐶⟶𝐵) | |
2 | fssres 5254 | . . 3 ⊢ ((𝐴:𝐶⟶𝐵 ∧ 𝐷 ⊆ 𝐶) → (𝐴 ↾ 𝐷):𝐷⟶𝐵) | |
3 | 1, 2 | sylan 279 | . 2 ⊢ ((𝐴 ∈ (𝐵 ↑𝑚 𝐶) ∧ 𝐷 ⊆ 𝐶) → (𝐴 ↾ 𝐷):𝐷⟶𝐵) |
4 | elmapex 6515 | . . . . 5 ⊢ (𝐴 ∈ (𝐵 ↑𝑚 𝐶) → (𝐵 ∈ V ∧ 𝐶 ∈ V)) | |
5 | 4 | simpld 111 | . . . 4 ⊢ (𝐴 ∈ (𝐵 ↑𝑚 𝐶) → 𝐵 ∈ V) |
6 | 5 | adantr 272 | . . 3 ⊢ ((𝐴 ∈ (𝐵 ↑𝑚 𝐶) ∧ 𝐷 ⊆ 𝐶) → 𝐵 ∈ V) |
7 | 4 | simprd 113 | . . . 4 ⊢ (𝐴 ∈ (𝐵 ↑𝑚 𝐶) → 𝐶 ∈ V) |
8 | ssexg 4025 | . . . . 5 ⊢ ((𝐷 ⊆ 𝐶 ∧ 𝐶 ∈ V) → 𝐷 ∈ V) | |
9 | 8 | ancoms 266 | . . . 4 ⊢ ((𝐶 ∈ V ∧ 𝐷 ⊆ 𝐶) → 𝐷 ∈ V) |
10 | 7, 9 | sylan 279 | . . 3 ⊢ ((𝐴 ∈ (𝐵 ↑𝑚 𝐶) ∧ 𝐷 ⊆ 𝐶) → 𝐷 ∈ V) |
11 | 6, 10 | elmapd 6508 | . 2 ⊢ ((𝐴 ∈ (𝐵 ↑𝑚 𝐶) ∧ 𝐷 ⊆ 𝐶) → ((𝐴 ↾ 𝐷) ∈ (𝐵 ↑𝑚 𝐷) ↔ (𝐴 ↾ 𝐷):𝐷⟶𝐵)) |
12 | 3, 11 | mpbird 166 | 1 ⊢ ((𝐴 ∈ (𝐵 ↑𝑚 𝐶) ∧ 𝐷 ⊆ 𝐶) → (𝐴 ↾ 𝐷) ∈ (𝐵 ↑𝑚 𝐷)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ∈ wcel 1461 Vcvv 2655 ⊆ wss 3035 ↾ cres 4499 ⟶wf 5075 (class class class)co 5726 ↑𝑚 cmap 6494 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 586 ax-in2 587 ax-io 681 ax-5 1404 ax-7 1405 ax-gen 1406 ax-ie1 1450 ax-ie2 1451 ax-8 1463 ax-10 1464 ax-11 1465 ax-i12 1466 ax-bndl 1467 ax-4 1468 ax-13 1472 ax-14 1473 ax-17 1487 ax-i9 1491 ax-ial 1495 ax-i5r 1496 ax-ext 2095 ax-sep 4004 ax-pow 4056 ax-pr 4089 ax-un 4313 ax-setind 4410 |
This theorem depends on definitions: df-bi 116 df-3an 945 df-tru 1315 df-fal 1318 df-nf 1418 df-sb 1717 df-eu 1976 df-mo 1977 df-clab 2100 df-cleq 2106 df-clel 2109 df-nfc 2242 df-ne 2281 df-ral 2393 df-rex 2394 df-v 2657 df-sbc 2877 df-dif 3037 df-un 3039 df-in 3041 df-ss 3048 df-pw 3476 df-sn 3497 df-pr 3498 df-op 3500 df-uni 3701 df-br 3894 df-opab 3948 df-id 4173 df-xp 4503 df-rel 4504 df-cnv 4505 df-co 4506 df-dm 4507 df-rn 4508 df-res 4509 df-iota 5044 df-fun 5081 df-fn 5082 df-f 5083 df-fv 5087 df-ov 5729 df-oprab 5730 df-mpo 5731 df-map 6496 |
This theorem is referenced by: (None) |
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