| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > findcard2s | Structured version Visualization version GIF version | ||
| Description: Variation of findcard2 9101 requiring that the element added in the induction step not be a member of the original set. (Contributed by Paul Chapman, 30-Nov-2012.) |
| Ref | Expression |
|---|---|
| findcard2s.1 | ⊢ (𝑥 = ∅ → (𝜑 ↔ 𝜓)) |
| findcard2s.2 | ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜒)) |
| findcard2s.3 | ⊢ (𝑥 = (𝑦 ∪ {𝑧}) → (𝜑 ↔ 𝜃)) |
| findcard2s.4 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏)) |
| findcard2s.5 | ⊢ 𝜓 |
| findcard2s.6 | ⊢ ((𝑦 ∈ Fin ∧ ¬ 𝑧 ∈ 𝑦) → (𝜒 → 𝜃)) |
| Ref | Expression |
|---|---|
| findcard2s | ⊢ (𝐴 ∈ Fin → 𝜏) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | findcard2s.1 | . 2 ⊢ (𝑥 = ∅ → (𝜑 ↔ 𝜓)) | |
| 2 | findcard2s.2 | . 2 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜒)) | |
| 3 | findcard2s.3 | . 2 ⊢ (𝑥 = (𝑦 ∪ {𝑧}) → (𝜑 ↔ 𝜃)) | |
| 4 | findcard2s.4 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏)) | |
| 5 | findcard2s.5 | . 2 ⊢ 𝜓 | |
| 6 | findcard2s.6 | . . . 4 ⊢ ((𝑦 ∈ Fin ∧ ¬ 𝑧 ∈ 𝑦) → (𝜒 → 𝜃)) | |
| 7 | 6 | ex 412 | . . 3 ⊢ (𝑦 ∈ Fin → (¬ 𝑧 ∈ 𝑦 → (𝜒 → 𝜃))) |
| 8 | snssi 4766 | . . . . . . . 8 ⊢ (𝑧 ∈ 𝑦 → {𝑧} ⊆ 𝑦) | |
| 9 | ssequn1 4140 | . . . . . . . 8 ⊢ ({𝑧} ⊆ 𝑦 ↔ ({𝑧} ∪ 𝑦) = 𝑦) | |
| 10 | 8, 9 | sylib 218 | . . . . . . 7 ⊢ (𝑧 ∈ 𝑦 → ({𝑧} ∪ 𝑦) = 𝑦) |
| 11 | uncom 4112 | . . . . . . 7 ⊢ ({𝑧} ∪ 𝑦) = (𝑦 ∪ {𝑧}) | |
| 12 | 10, 11 | eqtr3di 2787 | . . . . . 6 ⊢ (𝑧 ∈ 𝑦 → 𝑦 = (𝑦 ∪ {𝑧})) |
| 13 | vex 3446 | . . . . . . 7 ⊢ 𝑦 ∈ V | |
| 14 | 13 | eqvinc 3605 | . . . . . 6 ⊢ (𝑦 = (𝑦 ∪ {𝑧}) ↔ ∃𝑥(𝑥 = 𝑦 ∧ 𝑥 = (𝑦 ∪ {𝑧}))) |
| 15 | 12, 14 | sylib 218 | . . . . 5 ⊢ (𝑧 ∈ 𝑦 → ∃𝑥(𝑥 = 𝑦 ∧ 𝑥 = (𝑦 ∪ {𝑧}))) |
| 16 | 2 | bicomd 223 | . . . . . . 7 ⊢ (𝑥 = 𝑦 → (𝜒 ↔ 𝜑)) |
| 17 | 16, 3 | sylan9bb 509 | . . . . . 6 ⊢ ((𝑥 = 𝑦 ∧ 𝑥 = (𝑦 ∪ {𝑧})) → (𝜒 ↔ 𝜃)) |
| 18 | 17 | exlimiv 1932 | . . . . 5 ⊢ (∃𝑥(𝑥 = 𝑦 ∧ 𝑥 = (𝑦 ∪ {𝑧})) → (𝜒 ↔ 𝜃)) |
| 19 | 15, 18 | syl 17 | . . . 4 ⊢ (𝑧 ∈ 𝑦 → (𝜒 ↔ 𝜃)) |
| 20 | 19 | biimpd 229 | . . 3 ⊢ (𝑧 ∈ 𝑦 → (𝜒 → 𝜃)) |
| 21 | 7, 20 | pm2.61d2 181 | . 2 ⊢ (𝑦 ∈ Fin → (𝜒 → 𝜃)) |
| 22 | 1, 2, 3, 4, 5, 21 | findcard2 9101 | 1 ⊢ (𝐴 ∈ Fin → 𝜏) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∃wex 1781 ∈ wcel 2114 ∪ cun 3901 ⊆ wss 3903 ∅c0 4287 {csn 4582 Fincfn 8895 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-om 7819 df-en 8896 df-fin 8899 |
| This theorem is referenced by: findcard2d 9103 unfi 9107 ac6sfi 9196 fodomfi 9224 domunfican 9234 fodomfiOLD 9242 hashxplem 14368 hashmap 14370 hashbc 14388 hashf1lem2 14391 hashf1 14392 fsum2d 15706 fsumabs 15736 fsumrlim 15746 fsumo1 15747 fsumiun 15756 incexclem 15771 fprod2d 15916 coprmprod 16600 coprmproddvds 16602 gsum2dlem2 19912 ablfac1eulem 20015 gsumle 20086 mplcoe1 22004 mplcoe5 22007 coe1fzgsumd 22260 evl1gsumd 22313 mdetunilem9 22576 ptcmpfi 23769 tmdgsum 24051 fsumcn 24829 ovolfiniun 25470 volfiniun 25516 itgfsum 25796 dvmptfsum 25947 jensen 26967 gsumvsca1 33319 gsumvsca2 33320 finixpnum 37845 matunitlindflem1 37856 pwslnm 43440 fnchoice 45378 dvmptfprod 46292 |
| Copyright terms: Public domain | W3C validator |