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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 475 | . 2 ⊢ (𝐴 ∈ V ∧ 𝐵 ∈ V) |
| 4 | funpr.3 | . . 3 ⊢ 𝐶 ∈ V | |
| 5 | funpr.4 | . . 3 ⊢ 𝐷 ∈ V | |
| 6 | 4, 5 | pm3.2i 475 | . 2 ⊢ (𝐶 ∈ V ∧ 𝐷 ∈ V) |
| 7 | funprg 6590 | . 2 ⊢ (((𝐴 ∈ V ∧ 𝐵 ∈ V) ∧ (𝐶 ∈ V ∧ 𝐷 ∈ V) ∧ 𝐴 ≠ 𝐵) → Fun {〈𝐴, 𝐶〉, 〈𝐵, 𝐷〉}) | |
| 8 | 3, 6, 7 | mp3an12 1479 | 1 ⊢ (𝐴 ≠ 𝐵 → Fun {〈𝐴, 𝐶〉, 〈𝐵, 𝐷〉}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 400 ∈ wcel 2142 ≠ wne 2957 Vcvv 3454 {cpr 4590 〈cop 4594 Fun wfun 6530 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-pr 5403 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-sb 2096 df-mo 2566 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3416 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-sn 4589 df-pr 4591 df-op 4595 df-br 5109 df-opab 5173 df-id 5555 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-fun 6538 |
| This theorem is used by: funtp 6593 fpr 7151 fnprb 7206 |
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