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| Mirrors > Home > MPE Home > Th. List > fpwipodrs | Structured version Visualization version GIF version | ||
| Description: The finite subsets of any set are directed by inclusion. (Contributed by Stefan O'Rear, 2-Apr-2015.) |
| Ref | Expression |
|---|---|
| fpwipodrs | ⊢ (𝐴 ∈ 𝑉 → (toInc‘(𝒫 𝐴 ∩ Fin)) ∈ Dirset) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pwexg 5316 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 𝒫 𝐴 ∈ V) | |
| 2 | inex1g 5257 | . . 3 ⊢ (𝒫 𝐴 ∈ V → (𝒫 𝐴 ∩ Fin) ∈ V) | |
| 3 | 1, 2 | syl 17 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 𝐴 ∩ Fin) ∈ V) |
| 4 | 0elpw 5294 | . . . 4 ⊢ ∅ ∈ 𝒫 𝐴 | |
| 5 | 0fi 8964 | . . . 4 ⊢ ∅ ∈ Fin | |
| 6 | 4, 5 | elini 4149 | . . 3 ⊢ ∅ ∈ (𝒫 𝐴 ∩ Fin) |
| 7 | ne0i 4291 | . . 3 ⊢ (∅ ∈ (𝒫 𝐴 ∩ Fin) → (𝒫 𝐴 ∩ Fin) ≠ ∅) | |
| 8 | 6, 7 | mp1i 13 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 𝐴 ∩ Fin) ≠ ∅) |
| 9 | elin 3918 | . . . . . 6 ⊢ (𝑥 ∈ (𝒫 𝐴 ∩ Fin) ↔ (𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 ∈ Fin)) | |
| 10 | elin 3918 | . . . . . 6 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) ↔ (𝑦 ∈ 𝒫 𝐴 ∧ 𝑦 ∈ Fin)) | |
| 11 | pwuncl 7703 | . . . . . . . 8 ⊢ ((𝑥 ∈ 𝒫 𝐴 ∧ 𝑦 ∈ 𝒫 𝐴) → (𝑥 ∪ 𝑦) ∈ 𝒫 𝐴) | |
| 12 | 11 | ad2ant2r 747 | . . . . . . 7 ⊢ (((𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 ∈ Fin) ∧ (𝑦 ∈ 𝒫 𝐴 ∧ 𝑦 ∈ Fin)) → (𝑥 ∪ 𝑦) ∈ 𝒫 𝐴) |
| 13 | unfi 9080 | . . . . . . . 8 ⊢ ((𝑥 ∈ Fin ∧ 𝑦 ∈ Fin) → (𝑥 ∪ 𝑦) ∈ Fin) | |
| 14 | 13 | ad2ant2l 746 | . . . . . . 7 ⊢ (((𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 ∈ Fin) ∧ (𝑦 ∈ 𝒫 𝐴 ∧ 𝑦 ∈ Fin)) → (𝑥 ∪ 𝑦) ∈ Fin) |
| 15 | 12, 14 | elind 4150 | . . . . . 6 ⊢ (((𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 ∈ Fin) ∧ (𝑦 ∈ 𝒫 𝐴 ∧ 𝑦 ∈ Fin)) → (𝑥 ∪ 𝑦) ∈ (𝒫 𝐴 ∩ Fin)) |
| 16 | 9, 10, 15 | syl2anb 598 | . . . . 5 ⊢ ((𝑥 ∈ (𝒫 𝐴 ∩ Fin) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (𝑥 ∪ 𝑦) ∈ (𝒫 𝐴 ∩ Fin)) |
| 17 | ssid 3957 | . . . . 5 ⊢ (𝑥 ∪ 𝑦) ⊆ (𝑥 ∪ 𝑦) | |
| 18 | sseq2 3961 | . . . . . 6 ⊢ (𝑧 = (𝑥 ∪ 𝑦) → ((𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ (𝑥 ∪ 𝑦) ⊆ (𝑥 ∪ 𝑦))) | |
| 19 | 18 | rspcev 3577 | . . . . 5 ⊢ (((𝑥 ∪ 𝑦) ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝑥 ∪ 𝑦) ⊆ (𝑥 ∪ 𝑦)) → ∃𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑥 ∪ 𝑦) ⊆ 𝑧) |
| 20 | 16, 17, 19 | sylancl 586 | . . . 4 ⊢ ((𝑥 ∈ (𝒫 𝐴 ∩ Fin) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → ∃𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑥 ∪ 𝑦) ⊆ 𝑧) |
| 21 | 20 | rgen2 3172 | . . 3 ⊢ ∀𝑥 ∈ (𝒫 𝐴 ∩ Fin)∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)∃𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑥 ∪ 𝑦) ⊆ 𝑧 |
| 22 | 21 | a1i 11 | . 2 ⊢ (𝐴 ∈ 𝑉 → ∀𝑥 ∈ (𝒫 𝐴 ∩ Fin)∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)∃𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑥 ∪ 𝑦) ⊆ 𝑧) |
| 23 | isipodrs 18440 | . 2 ⊢ ((toInc‘(𝒫 𝐴 ∩ Fin)) ∈ Dirset ↔ ((𝒫 𝐴 ∩ Fin) ∈ V ∧ (𝒫 𝐴 ∩ Fin) ≠ ∅ ∧ ∀𝑥 ∈ (𝒫 𝐴 ∩ Fin)∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)∃𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑥 ∪ 𝑦) ⊆ 𝑧)) | |
| 24 | 3, 8, 22, 23 | syl3anbrc 1344 | 1 ⊢ (𝐴 ∈ 𝑉 → (toInc‘(𝒫 𝐴 ∩ Fin)) ∈ Dirset) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2111 ≠ wne 2928 ∀wral 3047 ∃wrex 3056 Vcvv 3436 ∪ cun 3900 ∩ cin 3901 ⊆ wss 3902 ∅c0 4283 𝒫 cpw 4550 ‘cfv 6481 Fincfn 8869 Dirsetcdrs 18196 toInccipo 18430 |
| 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-sep 5234 ax-nul 5244 ax-pow 5303 ax-pr 5370 ax-un 7668 ax-cnex 11059 ax-resscn 11060 ax-1cn 11061 ax-icn 11062 ax-addcl 11063 ax-addrcl 11064 ax-mulcl 11065 ax-mulrcl 11066 ax-mulcom 11067 ax-addass 11068 ax-mulass 11069 ax-distr 11070 ax-i2m1 11071 ax-1ne0 11072 ax-1rid 11073 ax-rnegex 11074 ax-rrecex 11075 ax-cnre 11076 ax-pre-lttri 11077 ax-pre-lttrn 11078 ax-pre-ltadd 11079 ax-pre-mulgt0 11080 |
| 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-nel 3033 df-ral 3048 df-rex 3057 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-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-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-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7797 df-1st 7921 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-pnf 11145 df-mnf 11146 df-xr 11147 df-ltxr 11148 df-le 11149 df-sub 11343 df-neg 11344 df-nn 12123 df-2 12185 df-3 12186 df-4 12187 df-5 12188 df-6 12189 df-7 12190 df-8 12191 df-9 12192 df-n0 12379 df-z 12466 df-dec 12586 df-uz 12730 df-fz 13405 df-struct 17055 df-slot 17090 df-ndx 17102 df-base 17118 df-tset 17177 df-ple 17178 df-ocomp 17179 df-proset 18197 df-drs 18198 df-poset 18216 df-ipo 18431 |
| This theorem is referenced by: isacs5lem 18448 isnacs3 42742 |
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