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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 9832 | . . 3 ⊢ inr:V–1-1-onto→({1o} × V) | |
| 2 | f1of1 6769 | . . 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 3940 | . 2 ⊢ 𝐵 ⊆ V | |
| 5 | inrresf 9835 | . 2 ⊢ (inr ↾ 𝐵):𝐵⟶(𝐴 ⊔ 𝐵) | |
| 6 | f1resf1 6734 | . 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 1470 | 1 ⊢ (inr ↾ 𝐵):𝐵–1-1→(𝐴 ⊔ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: Vcvv 3433 ⊆ wss 3884 {csn 4557 × cxp 5618 ↾ cres 5622 ⟶wf 6484 –1-1→wf1 6485 –1-1-onto→wf1o 6487 1oc1o 8392 ⊔ cdju 9817 inrcinr 9819 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-sep 5220 ax-nul 5230 ax-pr 5364 ax-un 7681 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-ral 3056 df-rex 3066 df-rab 3394 df-v 3435 df-dif 3887 df-un 3889 df-in 3891 df-ss 3901 df-pss 3904 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 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-om 7810 df-1st 7933 df-2nd 7934 df-1o 8399 df-dju 9820 df-inr 9822 |
| This theorem is referenced by: (None) |
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