| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5320 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 𝒫 𝐴 ∈ V) | |
| 2 | inex1g 5261 | . . 3 ⊢ (𝒫 𝐴 ∈ V → (𝒫 𝐴 ∩ Fin) ∈ V) | |
| 3 | 1, 2 | syl 17 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 𝐴 ∩ Fin) ∈ V) |
| 4 | 0elpw 5298 | . . . 4 ⊢ ∅ ∈ 𝒫 𝐴 | |
| 5 | 0fi 8974 | . . . 4 ⊢ ∅ ∈ Fin | |
| 6 | 4, 5 | elini 4152 | . . 3 ⊢ ∅ ∈ (𝒫 𝐴 ∩ Fin) |
| 7 | ne0i 4294 | . . 3 ⊢ (∅ ∈ (𝒫 𝐴 ∩ Fin) → (𝒫 𝐴 ∩ Fin) ≠ ∅) | |
| 8 | 6, 7 | mp1i 13 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 𝐴 ∩ Fin) ≠ ∅) |
| 9 | elin 3921 | . . . . . 6 ⊢ (𝑥 ∈ (𝒫 𝐴 ∩ Fin) ↔ (𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 ∈ Fin)) | |
| 10 | elin 3921 | . . . . . 6 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) ↔ (𝑦 ∈ 𝒫 𝐴 ∧ 𝑦 ∈ Fin)) | |
| 11 | pwuncl 7710 | . . . . . . . 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 9095 | . . . . . . . 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 4153 | . . . . . 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 3960 | . . . . 5 ⊢ (𝑥 ∪ 𝑦) ⊆ (𝑥 ∪ 𝑦) | |
| 18 | sseq2 3964 | . . . . . 6 ⊢ (𝑧 = (𝑥 ∪ 𝑦) → ((𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ (𝑥 ∪ 𝑦) ⊆ (𝑥 ∪ 𝑦))) | |
| 19 | 18 | rspcev 3579 | . . . . 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 3169 | . . 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 18461 | . 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 2109 ≠ wne 2925 ∀wral 3044 ∃wrex 3053 Vcvv 3438 ∪ cun 3903 ∩ cin 3904 ⊆ wss 3905 ∅c0 4286 𝒫 cpw 4553 ‘cfv 6486 Fincfn 8879 Dirsetcdrs 18217 toInccipo 18451 |
| 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-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7675 ax-cnex 11084 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 ax-pre-mulgt0 11105 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3346 df-rab 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-iun 4946 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7310 df-ov 7356 df-oprab 7357 df-mpo 7358 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8632 df-en 8880 df-dom 8881 df-sdom 8882 df-fin 8883 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11367 df-neg 11368 df-nn 12147 df-2 12209 df-3 12210 df-4 12211 df-5 12212 df-6 12213 df-7 12214 df-8 12215 df-9 12216 df-n0 12403 df-z 12490 df-dec 12610 df-uz 12754 df-fz 13429 df-struct 17076 df-slot 17111 df-ndx 17123 df-base 17139 df-tset 17198 df-ple 17199 df-ocomp 17200 df-proset 18218 df-drs 18219 df-poset 18237 df-ipo 18452 |
| This theorem is referenced by: isacs5lem 18469 isnacs3 42683 |
| Copyright terms: Public domain | W3C validator |