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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 5335 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 𝒫 𝐴 ∈ V) | |
| 2 | inex1g 5276 | . . 3 ⊢ (𝒫 𝐴 ∈ V → (𝒫 𝐴 ∩ Fin) ∈ V) | |
| 3 | 1, 2 | syl 17 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 𝐴 ∩ Fin) ∈ V) |
| 4 | 0elpw 5313 | . . . 4 ⊢ ∅ ∈ 𝒫 𝐴 | |
| 5 | 0fi 9015 | . . . 4 ⊢ ∅ ∈ Fin | |
| 6 | 4, 5 | elini 4164 | . . 3 ⊢ ∅ ∈ (𝒫 𝐴 ∩ Fin) |
| 7 | ne0i 4306 | . . 3 ⊢ (∅ ∈ (𝒫 𝐴 ∩ Fin) → (𝒫 𝐴 ∩ Fin) ≠ ∅) | |
| 8 | 6, 7 | mp1i 13 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 𝐴 ∩ Fin) ≠ ∅) |
| 9 | elin 3932 | . . . . . 6 ⊢ (𝑥 ∈ (𝒫 𝐴 ∩ Fin) ↔ (𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 ∈ Fin)) | |
| 10 | elin 3932 | . . . . . 6 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) ↔ (𝑦 ∈ 𝒫 𝐴 ∧ 𝑦 ∈ Fin)) | |
| 11 | pwuncl 7748 | . . . . . . . 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 9140 | . . . . . . . 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 4165 | . . . . . 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 3971 | . . . . 5 ⊢ (𝑥 ∪ 𝑦) ⊆ (𝑥 ∪ 𝑦) | |
| 18 | sseq2 3975 | . . . . . 6 ⊢ (𝑧 = (𝑥 ∪ 𝑦) → ((𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ (𝑥 ∪ 𝑦) ⊆ (𝑥 ∪ 𝑦))) | |
| 19 | 18 | rspcev 3591 | . . . . 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 3178 | . . 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 18502 | . 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 2926 ∀wral 3045 ∃wrex 3054 Vcvv 3450 ∪ cun 3914 ∩ cin 3915 ⊆ wss 3916 ∅c0 4298 𝒫 cpw 4565 ‘cfv 6513 Fincfn 8920 Dirsetcdrs 18260 toInccipo 18492 |
| 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 2702 ax-sep 5253 ax-nul 5263 ax-pow 5322 ax-pr 5389 ax-un 7713 ax-cnex 11130 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-i2m1 11142 ax-1ne0 11143 ax-1rid 11144 ax-rnegex 11145 ax-rrecex 11146 ax-cnre 11147 ax-pre-lttri 11148 ax-pre-lttrn 11149 ax-pre-ltadd 11150 ax-pre-mulgt0 11151 |
| 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 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3756 df-csb 3865 df-dif 3919 df-un 3921 df-in 3923 df-ss 3933 df-pss 3936 df-nul 4299 df-if 4491 df-pw 4567 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5110 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5535 df-eprel 5540 df-po 5548 df-so 5549 df-fr 5593 df-we 5595 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-pred 6276 df-ord 6337 df-on 6338 df-lim 6339 df-suc 6340 df-iota 6466 df-fun 6515 df-fn 6516 df-f 6517 df-f1 6518 df-fo 6519 df-f1o 6520 df-fv 6521 df-riota 7346 df-ov 7392 df-oprab 7393 df-mpo 7394 df-om 7845 df-1st 7970 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8380 df-1o 8436 df-er 8673 df-en 8921 df-dom 8922 df-sdom 8923 df-fin 8924 df-pnf 11216 df-mnf 11217 df-xr 11218 df-ltxr 11219 df-le 11220 df-sub 11413 df-neg 11414 df-nn 12188 df-2 12250 df-3 12251 df-4 12252 df-5 12253 df-6 12254 df-7 12255 df-8 12256 df-9 12257 df-n0 12449 df-z 12536 df-dec 12656 df-uz 12800 df-fz 13475 df-struct 17123 df-slot 17158 df-ndx 17170 df-base 17186 df-tset 17245 df-ple 17246 df-ocomp 17247 df-proset 18261 df-drs 18262 df-poset 18280 df-ipo 18493 |
| This theorem is referenced by: isacs5lem 18510 isnacs3 42691 |
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