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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 9675 | . . 3 ⊢ (𝐴 ∈ Fin ↔ 𝐴 ≺ ω) | |
| 2 | 1 | notbii 320 | . 2 ⊢ (¬ 𝐴 ∈ Fin ↔ ¬ 𝐴 ≺ ω) |
| 3 | omex 9666 | . . 3 ⊢ ω ∈ V | |
| 4 | domtri 10579 | . . 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 2107 Vcvv 3464 class class class wbr 5125 ωcom 7870 ≼ cdom 8966 ≺ csdm 8967 Fincfn 8968 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 ax-rep 5261 ax-sep 5278 ax-nul 5288 ax-pow 5347 ax-pr 5414 ax-un 7738 ax-inf2 9664 ax-ac2 10486 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2808 df-nfc 2884 df-ne 2932 df-ral 3051 df-rex 3060 df-rmo 3364 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3773 df-csb 3882 df-dif 3936 df-un 3938 df-in 3940 df-ss 3950 df-pss 3953 df-nul 4316 df-if 4508 df-pw 4584 df-sn 4609 df-pr 4611 df-op 4615 df-uni 4890 df-int 4929 df-iun 4975 df-br 5126 df-opab 5188 df-mpt 5208 df-tr 5242 df-id 5560 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-se 5620 df-we 5621 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-res 5679 df-ima 5680 df-pred 6303 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6495 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7371 df-ov 7417 df-om 7871 df-2nd 7998 df-frecs 8289 df-wrecs 8320 df-recs 8394 df-rdg 8433 df-1o 8489 df-er 8728 df-en 8969 df-dom 8970 df-sdom 8971 df-fin 8972 df-card 9962 df-ac 10139 |
| This theorem is referenced by: unirnfdomd 10590 ctbssinf 37348 pibt2 37359 |
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