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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 9827 | . . 3 ⊢ inr:V–1-1-onto→({1o} × V) | |
| 2 | f1of1 6772 | . . 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 3957 | . 2 ⊢ 𝐵 ⊆ V | |
| 5 | inrresf 9830 | . 2 ⊢ (inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵) | |
| 6 | f1resf1 6737 | . 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 1464 | 1 ⊢ (inr ↾ 𝐵):𝐵–1-1→(𝐴 ⊔ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: Vcvv 3439 ⊆ wss 3900 {csn 4579 × cxp 5621 ↾ cres 5625 ⟶wf 6487 –1-1→wf1 6488 –1-1-onto→wf1o 6490 1oc1o 8390 ⊔ cdju 9812 inrcinr 9814 |
| 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 2183 ax-ext 2707 ax-sep 5240 ax-nul 5250 ax-pr 5376 ax-un 7680 |
| 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 2932 df-ral 3051 df-rex 3060 df-rab 3399 df-v 3441 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-pss 3920 df-nul 4285 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ord 6319 df-on 6320 df-lim 6321 df-suc 6322 df-iota 6447 df-fun 6493 df-fn 6494 df-f 6495 df-f1 6496 df-fo 6497 df-f1o 6498 df-fv 6499 df-om 7809 df-1st 7933 df-2nd 7934 df-1o 8397 df-dju 9815 df-inr 9817 |
| This theorem is referenced by: (None) |
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