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| Mirrors > Home > ILE Home > Th. List > fntp | GIF version | ||
| Description: A function with a domain of three elements. (Contributed by NM, 14-Sep-2011.) (Revised by Mario Carneiro, 26-Apr-2015.) | 
| Ref | Expression | 
|---|---|
| fntp.1 | ⊢ 𝐴 ∈ V | 
| fntp.2 | ⊢ 𝐵 ∈ V | 
| fntp.3 | ⊢ 𝐶 ∈ V | 
| fntp.4 | ⊢ 𝐷 ∈ V | 
| fntp.5 | ⊢ 𝐸 ∈ V | 
| fntp.6 | ⊢ 𝐹 ∈ V | 
| Ref | Expression | 
|---|---|
| fntp | ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶 ∧ 𝐵 ≠ 𝐶) → {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} Fn {𝐴, 𝐵, 𝐶}) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | fntp.1 | . . 3 ⊢ 𝐴 ∈ V | |
| 2 | fntp.2 | . . 3 ⊢ 𝐵 ∈ V | |
| 3 | fntp.3 | . . 3 ⊢ 𝐶 ∈ V | |
| 4 | fntp.4 | . . 3 ⊢ 𝐷 ∈ V | |
| 5 | fntp.5 | . . 3 ⊢ 𝐸 ∈ V | |
| 6 | fntp.6 | . . 3 ⊢ 𝐹 ∈ V | |
| 7 | 1, 2, 3, 4, 5, 6 | funtp 5311 | . 2 ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶 ∧ 𝐵 ≠ 𝐶) → Fun {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉}) | 
| 8 | 4, 5, 6 | dmtpop 5145 | . . 3 ⊢ dom {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} = {𝐴, 𝐵, 𝐶} | 
| 9 | 8 | a1i 9 | . 2 ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶 ∧ 𝐵 ≠ 𝐶) → dom {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} = {𝐴, 𝐵, 𝐶}) | 
| 10 | df-fn 5261 | . 2 ⊢ ({〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} Fn {𝐴, 𝐵, 𝐶} ↔ (Fun {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} ∧ dom {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} = {𝐴, 𝐵, 𝐶})) | |
| 11 | 7, 9, 10 | sylanbrc 417 | 1 ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶 ∧ 𝐵 ≠ 𝐶) → {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉} Fn {𝐴, 𝐵, 𝐶}) | 
| Colors of variables: wff set class | 
| Syntax hints: → wi 4 ∧ w3a 980 = wceq 1364 ∈ wcel 2167 ≠ wne 2367 Vcvv 2763 {ctp 3624 〈cop 3625 dom cdm 4663 Fun wfun 5252 Fn wfn 5253 | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-14 2170 ax-ext 2178 ax-sep 4151 ax-pow 4207 ax-pr 4242 | 
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-ral 2480 df-rex 2481 df-v 2765 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-nul 3451 df-pw 3607 df-sn 3628 df-pr 3629 df-tp 3630 df-op 3631 df-br 4034 df-opab 4095 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-fun 5260 df-fn 5261 | 
| This theorem is referenced by: (None) | 
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