| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > funpr | GIF version | ||
| Description: A function with a domain of two elements. (Contributed by Jeff Madsen, 20-Jun-2010.) |
| Ref | Expression |
|---|---|
| funpr.1 | ⊢ 𝐴 ∈ V |
| funpr.2 | ⊢ 𝐵 ∈ V |
| funpr.3 | ⊢ 𝐶 ∈ V |
| funpr.4 | ⊢ 𝐷 ∈ V |
| Ref | Expression |
|---|---|
| funpr | ⊢ (𝐴 ≠ 𝐵 → Fun {〈𝐴, 𝐶〉, 〈𝐵, 𝐷〉}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funpr.1 | . . 3 ⊢ 𝐴 ∈ V | |
| 2 | funpr.2 | . . 3 ⊢ 𝐵 ∈ V | |
| 3 | 1, 2 | pm3.2i 272 | . 2 ⊢ (𝐴 ∈ V ∧ 𝐵 ∈ V) |
| 4 | funpr.3 | . . 3 ⊢ 𝐶 ∈ V | |
| 5 | funpr.4 | . . 3 ⊢ 𝐷 ∈ V | |
| 6 | 4, 5 | pm3.2i 272 | . 2 ⊢ (𝐶 ∈ V ∧ 𝐷 ∈ V) |
| 7 | funprg 5308 | . 2 ⊢ (((𝐴 ∈ V ∧ 𝐵 ∈ V) ∧ (𝐶 ∈ V ∧ 𝐷 ∈ V) ∧ 𝐴 ≠ 𝐵) → Fun {〈𝐴, 𝐶〉, 〈𝐵, 𝐷〉}) | |
| 8 | 3, 6, 7 | mp3an12 1338 | 1 ⊢ (𝐴 ≠ 𝐵 → Fun {〈𝐴, 𝐶〉, 〈𝐵, 𝐷〉}) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2167 ≠ wne 2367 Vcvv 2763 {cpr 3623 〈cop 3625 Fun wfun 5252 |
| 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-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 |
| This theorem is referenced by: funtp 5311 fpr 5744 |
| Copyright terms: Public domain | W3C validator |