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| Mirrors > Home > MPE Home > Th. List > f1o2d | Structured version Visualization version GIF version | ||
| Description: Describe an implicit one-to-one onto function. (Contributed by Mario Carneiro, 12-May-2014.) |
| Ref | Expression |
|---|---|
| f1od.1 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐶) |
| f1o2d.2 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ 𝐵) |
| f1o2d.3 | ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐵) → 𝐷 ∈ 𝐴) |
| f1o2d.4 | ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) → (𝑥 = 𝐷 ↔ 𝑦 = 𝐶)) |
| Ref | Expression |
|---|---|
| f1o2d | ⊢ (𝜑 → 𝐹:𝐴–1-1-onto→𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1od.1 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐶) | |
| 2 | f1o2d.2 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ 𝐵) | |
| 3 | f1o2d.3 | . . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐵) → 𝐷 ∈ 𝐴) | |
| 4 | f1o2d.4 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) → (𝑥 = 𝐷 ↔ 𝑦 = 𝐶)) | |
| 5 | 1, 2, 3, 4 | f1ocnv2d 7674 | . 2 ⊢ (𝜑 → (𝐹:𝐴–1-1-onto→𝐵 ∧ ◡𝐹 = (𝑦 ∈ 𝐵 ↦ 𝐷))) |
| 6 | 5 | simpld 500 | 1 ⊢ (𝜑 → 𝐹:𝐴–1-1-onto→𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1569 ∈ wcel 2144 ↦ cmpt 5185 ◡ccnv 5649 –1-1-onto→wf1o 6537 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 |
| This theorem is used by: f1opw2 7676 mpof1o2d 8139 en3d 9019 f1opwfi 9348 mapfien 9403 djulf1o 9996 djurf1o 9997 fin23lem22 10408 negf1o 11749 incexclem 16010 dvdsflip 16492 hashgcdlem 16970 grplmulf1o 19228 grpraddf1o 19229 conjghm 19468 gapm 19525 sylow2a 19838 lsmhash 19924 psrbagconf1o 22242 psdmul 22492 hmeoimaf1o 24094 itg1mulc 26030 resinf1o 26869 eff1olem 26881 sqff1o 27514 dvdsppwf1o 27518 dvdsflf1o 27519 fcobij 33358 mgcf1o 33610 subfacp1lem3 36033 subfacp1lem5 36035 frlmsnic 43697 isubgr3stgrlem8 49164 |
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