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Mirrors > Home > MPE Home > Th. List > fvtp1 | Structured version Visualization version GIF version |
Description: The first value of a function with a domain of three elements. (Contributed by NM, 14-Sep-2011.) |
Ref | Expression |
---|---|
fvtp1.1 | ⊢ 𝐴 ∈ V |
fvtp1.4 | ⊢ 𝐷 ∈ V |
Ref | Expression |
---|---|
fvtp1 | ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶) → ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉}‘𝐴) = 𝐷) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-tp 4563 | . . 3 ⊢ {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} = ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉}) | |
2 | 1 | fveq1i 6757 | . 2 ⊢ ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉}‘𝐴) = (({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉})‘𝐴) |
3 | necom 2996 | . . . 4 ⊢ (𝐴 ≠ 𝐶 ↔ 𝐶 ≠ 𝐴) | |
4 | fvunsn 7033 | . . . 4 ⊢ (𝐶 ≠ 𝐴 → (({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉})‘𝐴) = ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉}‘𝐴)) | |
5 | 3, 4 | sylbi 216 | . . 3 ⊢ (𝐴 ≠ 𝐶 → (({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉})‘𝐴) = ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉}‘𝐴)) |
6 | fvtp1.1 | . . . 4 ⊢ 𝐴 ∈ V | |
7 | fvtp1.4 | . . . 4 ⊢ 𝐷 ∈ V | |
8 | 6, 7 | fvpr1 7047 | . . 3 ⊢ (𝐴 ≠ 𝐵 → ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉}‘𝐴) = 𝐷) |
9 | 5, 8 | sylan9eqr 2801 | . 2 ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶) → (({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉})‘𝐴) = 𝐷) |
10 | 2, 9 | eqtrid 2790 | 1 ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶) → ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉}‘𝐴) = 𝐷) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 Vcvv 3422 ∪ cun 3881 {csn 4558 {cpr 4560 {ctp 4562 〈cop 4564 ‘cfv 6418 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-res 5592 df-iota 6376 df-fun 6420 df-fv 6426 |
This theorem is referenced by: fvtp2 7053 fntpb 7067 rabren3dioph 40553 nnsum4primesodd 45136 nnsum4primesoddALTV 45137 |
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