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| Mirrors > Home > MPE Home > Th. List > opnzi | Structured version Visualization version GIF version | ||
| Description: An ordered pair is nonempty if the arguments are sets. (Contributed by Mario Carneiro, 26-Apr-2015.) |
| Ref | Expression |
|---|---|
| opth1.1 | ⊢ 𝐴 ∈ V |
| opth1.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| opnzi | ⊢ 〈𝐴, 𝐵〉 ≠ ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opth1.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | opth1.2 | . 2 ⊢ 𝐵 ∈ V | |
| 3 | opnz 5433 | . 2 ⊢ (〈𝐴, 𝐵〉 ≠ ∅ ↔ (𝐴 ∈ V ∧ 𝐵 ∈ V)) | |
| 4 | 1, 2, 3 | mpbir2an 711 | 1 ⊢ 〈𝐴, 𝐵〉 ≠ ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2109 ≠ wne 2925 Vcvv 3447 ∅c0 4296 〈cop 4595 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pr 5387 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-ne 2926 df-v 3449 df-dif 3917 df-un 3919 df-ss 3931 df-nul 4297 df-if 4489 df-sn 4590 df-pr 4592 df-op 4596 |
| This theorem is referenced by: opelopabsb 5490 0nelopab 5527 0nelxp 5672 unixp0 6256 funopsn 7120 cnfldfun 21278 cnfldfunOLD 21291 fmlaomn0 35377 finxpreclem2 37378 finxp0 37379 finxpreclem6 37384 |
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