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| Mirrors > Home > MPE Home > Th. List > inrresf | Structured version Visualization version GIF version | ||
| Description: The right injection restricted to the right class of a disjoint union is a function from the right class into the disjoint union. (Contributed by AV, 27-Jun-2022.) |
| Ref | Expression |
|---|---|
| inrresf | ⊢ (inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | djurf1o 9826 | . . 3 ⊢ inr:V–1-1-onto→({1o} × V) | |
| 2 | f1ofun 6771 | . . 3 ⊢ (inr:V–1-1-onto→({1o} × V) → Fun inr) | |
| 3 | ffvresb 7067 | . . 3 ⊢ (Fun inr → ((inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵) ↔ ∀𝑥 ∈ 𝐵 (𝑥 ∈ dom inr ∧ (inr‘𝑥) ∈ (𝐴 ⊔ 𝐵)))) | |
| 4 | 1, 2, 3 | mp2b 10 | . 2 ⊢ ((inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵) ↔ ∀𝑥 ∈ 𝐵 (𝑥 ∈ dom inr ∧ (inr‘𝑥) ∈ (𝐴 ⊔ 𝐵))) |
| 5 | elex 3448 | . . . 4 ⊢ (𝑥 ∈ 𝐵 → 𝑥 ∈ V) | |
| 6 | opex 5405 | . . . . 5 ⊢ 〈1o, 𝑥〉 ∈ V | |
| 7 | df-inr 9816 | . . . . 5 ⊢ inr = (𝑥 ∈ V ↦ 〈1o, 𝑥〉) | |
| 8 | 6, 7 | dmmpti 6631 | . . . 4 ⊢ dom inr = V |
| 9 | 5, 8 | eleqtrrdi 2846 | . . 3 ⊢ (𝑥 ∈ 𝐵 → 𝑥 ∈ dom inr) |
| 10 | djurcl 9824 | . . 3 ⊢ (𝑥 ∈ 𝐵 → (inr‘𝑥) ∈ (𝐴 ⊔ 𝐵)) | |
| 11 | 9, 10 | jca 511 | . 2 ⊢ (𝑥 ∈ 𝐵 → (𝑥 ∈ dom inr ∧ (inr‘𝑥) ∈ (𝐴 ⊔ 𝐵))) |
| 12 | 4, 11 | mprgbir 3056 | 1 ⊢ (inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 ∈ wcel 2114 ∀wral 3049 Vcvv 3427 {csn 4557 〈cop 4563 × cxp 5618 dom cdm 5620 ↾ cres 5622 Fun wfun 6481 ⟶wf 6483 –1-1-onto→wf1o 6486 ‘cfv 6487 1oc1o 8387 ⊔ cdju 9811 inrcinr 9813 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2184 ax-ext 2707 ax-sep 5220 ax-nul 5230 ax-pr 5364 ax-un 7678 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-ral 3050 df-rex 3060 df-rab 3388 df-v 3429 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-br 5075 df-opab 5137 df-mpt 5156 df-tr 5182 df-id 5515 df-eprel 5520 df-po 5528 df-so 5529 df-fr 5573 df-we 5575 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ord 6315 df-on 6316 df-lim 6317 df-suc 6318 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-f1 6492 df-fo 6493 df-f1o 6494 df-fv 6495 df-om 7807 df-1st 7931 df-2nd 7932 df-1o 8394 df-dju 9814 df-inr 9816 |
| This theorem is referenced by: inrresf1 9830 updjudhcoinrg 9846 updjud 9847 |
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