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| Mirrors > Home > MPE Home > Th. List > funpr | Structured version Visualization version 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 474 | . 2 ⊢ (𝐴 ∈ V ∧ 𝐵 ∈ V) |
| 4 | funpr.3 | . . 3 ⊢ 𝐶 ∈ V | |
| 5 | funpr.4 | . . 3 ⊢ 𝐷 ∈ V | |
| 6 | 4, 5 | pm3.2i 474 | . 2 ⊢ (𝐶 ∈ V ∧ 𝐷 ∈ V) |
| 7 | funprg 6577 | . 2 ⊢ (((𝐴 ∈ V ∧ 𝐵 ∈ V) ∧ (𝐶 ∈ V ∧ 𝐷 ∈ V) ∧ 𝐴 ≠ 𝐵) → Fun {〈𝐴, 𝐶〉, 〈𝐵, 𝐷〉}) | |
| 8 | 3, 6, 7 | mp3an12 1474 | 1 ⊢ (𝐴 ≠ 𝐵 → Fun {〈𝐴, 𝐶〉, 〈𝐵, 𝐷〉}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 ∈ wcel 2144 ≠ wne 2959 Vcvv 3456 {cpr 4586 〈cop 4590 Fun wfun 6517 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-12 2214 ax-ext 2736 ax-sep 5248 ax-pr 5392 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-sb 2093 df-mo 2568 df-clab 2743 df-cleq 2756 df-clel 2839 df-ne 2960 df-ral 3079 df-rex 3089 df-rab 3417 df-v 3458 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5103 df-opab 5165 df-id 5544 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-fun 6525 |
| This theorem is referenced by: funtp 6580 fpr 7139 fnprb 7194 |
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