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| Mirrors > Home > MPE Home > Th. List > inrresf1 | Structured version Visualization version GIF version | ||
| Description: The right injection restricted to the right class of a disjoint union is an injective function from the right class into the disjoint union. (Contributed by AV, 28-Jun-2022.) |
| Ref | Expression |
|---|---|
| inrresf1 | ⊢ (inr ↾ 𝐵):𝐵–1-1→(𝐴 ⊔ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | djurf1o 9873 | . . 3 ⊢ inr:V–1-1-onto→({1o} × V) | |
| 2 | f1of1 6807 | . . 3 ⊢ (inr:V–1-1-onto→({1o} × V) → inr:V–1-1→({1o} × V)) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ inr:V–1-1→({1o} × V) |
| 4 | ssv 3962 | . 2 ⊢ 𝐵 ⊆ V | |
| 5 | inrresf 9876 | . 2 ⊢ (inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵) | |
| 6 | f1resf1 6772 | . 2 ⊢ ((inr:V–1-1→({1o} × V) ∧ 𝐵 ⊆ V ∧ (inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵)) → (inr ↾ 𝐵):𝐵–1-1→(𝐴 ⊔ 𝐵)) | |
| 7 | 3, 4, 5, 6 | mp3an 1484 | 1 ⊢ (inr ↾ 𝐵):𝐵–1-1→(𝐴 ⊔ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: Vcvv 3456 ⊆ wss 3906 {csn 4584 × cxp 5647 ↾ cres 5651 ⟶wf 6519 –1-1→wf1 6520 –1-1-onto→wf1o 6522 1oc1o 8432 ⊔ cdju 9858 inrcinr 9860 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-sep 5248 ax-nul 5258 ax-pr 5392 ax-un 7720 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3079 df-rex 3089 df-rab 3417 df-v 3458 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5544 df-eprel 5549 df-po 5557 df-so 5558 df-fr 5602 df-we 5604 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ord 6351 df-on 6352 df-lim 6353 df-suc 6354 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-f1 6528 df-fo 6529 df-f1o 6530 df-fv 6531 df-om 7849 df-1st 7972 df-2nd 7973 df-1o 8439 df-dju 9861 df-inr 9863 |
| This theorem is referenced by: (None) |
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