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| Mirrors > Home > MPE Home > Th. List > infinf | Structured version Visualization version GIF version | ||
| Description: Equivalence between two infiniteness criteria for sets. (Contributed by David Moews, 1-May-2017.) |
| Ref | Expression |
|---|---|
| infinf | ⊢ (𝐴 ∈ 𝐵 → (¬ 𝐴 ∈ Fin ↔ ω ≼ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isfinite 9542 | . . 3 ⊢ (𝐴 ∈ Fin ↔ 𝐴 ≺ ω) | |
| 2 | 1 | notbii 320 | . 2 ⊢ (¬ 𝐴 ∈ Fin ↔ ¬ 𝐴 ≺ ω) |
| 3 | omex 9533 | . . 3 ⊢ ω ∈ V | |
| 4 | domtri 10444 | . . 3 ⊢ ((ω ∈ V ∧ 𝐴 ∈ 𝐵) → (ω ≼ 𝐴 ↔ ¬ 𝐴 ≺ ω)) | |
| 5 | 3, 4 | mpan 690 | . 2 ⊢ (𝐴 ∈ 𝐵 → (ω ≼ 𝐴 ↔ ¬ 𝐴 ≺ ω)) |
| 6 | 2, 5 | bitr4id 290 | 1 ⊢ (𝐴 ∈ 𝐵 → (¬ 𝐴 ∈ Fin ↔ ω ≼ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∈ wcel 2111 Vcvv 3436 class class class wbr 5091 ωcom 7796 ≼ cdom 8867 ≺ csdm 8868 Fincfn 8869 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5217 ax-sep 5234 ax-nul 5244 ax-pow 5303 ax-pr 5370 ax-un 7668 ax-inf2 9531 ax-ac2 10351 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-int 4898 df-iun 4943 df-br 5092 df-opab 5154 df-mpt 5173 df-tr 5199 df-id 5511 df-eprel 5516 df-po 5524 df-so 5525 df-fr 5569 df-se 5570 df-we 5571 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-rn 5627 df-res 5628 df-ima 5629 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-isom 6490 df-riota 7303 df-ov 7349 df-om 7797 df-2nd 7922 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-1o 8385 df-er 8622 df-en 8870 df-dom 8871 df-sdom 8872 df-fin 8873 df-card 9829 df-ac 10004 |
| This theorem is referenced by: unirnfdomd 10455 ctbssinf 37439 pibt2 37450 |
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