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Mirrors > Home > ILE Home > Th. List > fssresd | GIF version |
Description: Restriction of a function with a subclass of its domain, deduction form. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
Ref | Expression |
---|---|
fssresd.1 | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
fssresd.2 | ⊢ (𝜑 → 𝐶 ⊆ 𝐴) |
Ref | Expression |
---|---|
fssresd | ⊢ (𝜑 → (𝐹 ↾ 𝐶):𝐶⟶𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fssresd.1 | . 2 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
2 | fssresd.2 | . 2 ⊢ (𝜑 → 𝐶 ⊆ 𝐴) | |
3 | fssres 5363 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶):𝐶⟶𝐵) | |
4 | 1, 2, 3 | syl2anc 409 | 1 ⊢ (𝜑 → (𝐹 ↾ 𝐶):𝐶⟶𝐵) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ⊆ wss 3116 ↾ cres 4606 ⟶wf 5184 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-v 2728 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-br 3983 df-opab 4044 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-fun 5190 df-fn 5191 df-f 5192 |
This theorem is referenced by: cnrest 12875 cnptopresti 12878 cnptoprest 12879 psmetres2 12973 xmetres2 13019 metres2 13021 xmetresbl 13080 rescncf 13208 trilpolemlt1 13920 |
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