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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 5383 | . 2 ⊢ ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶 ∧ 𝐵 ≠ 𝐶) → Fun {〈𝐴, 𝐷〉, 〈𝐵, 𝐸〉, 〈𝐶, 𝐹〉}) |
| 8 | 4, 5, 6 | dmtpop 5212 | . . 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 5329 | . 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 1004 = wceq 1397 ∈ wcel 2202 ≠ wne 2402 Vcvv 2802 {ctp 3671 〈cop 3672 dom cdm 4725 Fun wfun 5320 Fn wfn 5321 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-tp 3677 df-op 3678 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-fun 5328 df-fn 5329 |
| This theorem is referenced by: (None) |
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