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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 9906 | . . 3 ⊢ inr:V–1-1-onto→({1o} × V) | |
| 2 | f1of1 6819 | . . 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 3960 | . 2 ⊢ 𝐵 ⊆ V | |
| 5 | inrresf 9909 | . 2 ⊢ (inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵) | |
| 6 | f1resf1 6784 | . 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 1489 | 1 ⊢ (inr ↾ 𝐵):𝐵–1-1→(𝐴 ⊔ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: Vcvv 3454 ⊆ wss 3904 {csn 4588 × cxp 5658 ↾ cres 5662 ⟶wf 6532 –1-1→wf1 6533 –1-1-onto→wf1o 6535 1oc1o 8444 ⊔ cdju 9891 inrcinr 9893 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pr 5403 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3416 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-om 7861 df-1st 7984 df-2nd 7985 df-1o 8451 df-dju 9894 df-inr 9896 |
| This theorem is used by: (None) |
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