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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 4573 | . . 3 ⊢ {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} = ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉}) | |
| 2 | 1 | fveq1i 6835 | . 2 ⊢ ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉}‘𝐴) = (({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉})‘𝐴) |
| 3 | necom 2986 | . . . 4 ⊢ (𝐴 ≠ 𝐶 ↔ 𝐶 ≠ 𝐴) | |
| 4 | fvunsn 7127 | . . . 4 ⊢ (𝐶 ≠ 𝐴 → (({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉})‘𝐴) = ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉}‘𝐴)) | |
| 5 | 3, 4 | sylbi 217 | . . 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 7140 | . . 3 ⊢ (𝐴 ≠ 𝐵 → ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉}‘𝐴) = 𝐷) |
| 9 | 5, 8 | sylan9eqr 2794 | . 2 ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶) → (({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉} ∪ {〈𝐶, 𝐹〉})‘𝐴) = 𝐷) |
| 10 | 2, 9 | eqtrid 2784 | 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 1542 ∈ wcel 2114 ≠ wne 2933 Vcvv 3430 ∪ cun 3888 {csn 4568 {cpr 4570 {ctp 4572 〈cop 4574 ‘cfv 6492 |
| 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-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pr 5370 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-tp 4573 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-res 5636 df-iota 6448 df-fun 6494 df-fv 6500 |
| This theorem is referenced by: fvtp2 7144 fntpb 7157 rabren3dioph 43261 nnsum4primesodd 48284 nnsum4primesoddALTV 48285 |
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