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| Mirrors > Home > MPE Home > Th. List > Mathboxes > elhf2g | Structured version Visualization version GIF version | ||
| Description: Hereditarily finiteness via rank. Closed form of elhf2 36318. (Contributed by Scott Fenton, 15-Jul-2015.) |
| Ref | Expression |
|---|---|
| elhf2g | ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ Hf ↔ (rank‘𝐴) ∈ ω)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq1 2822 | . 2 ⊢ (𝑥 = 𝐴 → (𝑥 ∈ Hf ↔ 𝐴 ∈ Hf )) | |
| 2 | fveq2 6832 | . . 3 ⊢ (𝑥 = 𝐴 → (rank‘𝑥) = (rank‘𝐴)) | |
| 3 | 2 | eleq1d 2819 | . 2 ⊢ (𝑥 = 𝐴 → ((rank‘𝑥) ∈ ω ↔ (rank‘𝐴) ∈ ω)) |
| 4 | vex 3442 | . . 3 ⊢ 𝑥 ∈ V | |
| 5 | 4 | elhf2 36318 | . 2 ⊢ (𝑥 ∈ Hf ↔ (rank‘𝑥) ∈ ω) |
| 6 | 1, 3, 5 | vtoclbg 3512 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ Hf ↔ (rank‘𝐴) ∈ ω)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1541 ∈ wcel 2113 ‘cfv 6490 ωcom 7806 rankcrnk 9673 Hf chf 36315 |
| 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 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-reg 9495 ax-inf2 9548 |
| 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 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-int 4901 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-ov 7359 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-r1 9674 df-rank 9675 df-hf 36316 |
| This theorem is referenced by: hfun 36321 hfsn 36322 hfelhf 36324 hfuni 36327 hfpw 36328 hfninf 36329 |
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