| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > findcard2s | Structured version Visualization version GIF version | ||
| Description: Variation of findcard2 9093 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 4765 | . . . . . . . 8 ⊢ (𝑧 ∈ 𝑦 → {𝑧} ⊆ 𝑦) | |
| 9 | ssequn1 4139 | . . . . . . . 8 ⊢ ({𝑧} ⊆ 𝑦 ↔ ({𝑧} ∪ 𝑦) = 𝑦) | |
| 10 | 8, 9 | sylib 218 | . . . . . . 7 ⊢ (𝑧 ∈ 𝑦 → ({𝑧} ∪ 𝑦) = 𝑦) |
| 11 | uncom 4111 | . . . . . . 7 ⊢ ({𝑧} ∪ 𝑦) = (𝑦 ∪ {𝑧}) | |
| 12 | 10, 11 | eqtr3di 2787 | . . . . . 6 ⊢ (𝑧 ∈ 𝑦 → 𝑦 = (𝑦 ∪ {𝑧})) |
| 13 | vex 3445 | . . . . . . 7 ⊢ 𝑦 ∈ V | |
| 14 | 13 | eqvinc 3604 | . . . . . 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 9093 | 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 3900 ⊆ wss 3902 ∅c0 4286 {csn 4581 Fincfn 8887 |
| 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 5242 ax-nul 5252 ax-pr 5378 ax-un 7682 |
| 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 3062 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-opab 5162 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-om 7811 df-en 8888 df-fin 8891 |
| This theorem is referenced by: findcard2d 9095 unfi 9099 ac6sfi 9188 fodomfi 9216 domunfican 9226 fodomfiOLD 9234 hashxplem 14360 hashmap 14362 hashbc 14380 hashf1lem2 14383 hashf1 14384 fsum2d 15698 fsumabs 15728 fsumrlim 15738 fsumo1 15739 fsumiun 15748 incexclem 15763 fprod2d 15908 coprmprod 16592 coprmproddvds 16594 gsum2dlem2 19904 ablfac1eulem 20007 gsumle 20078 mplcoe1 21996 mplcoe5 21999 coe1fzgsumd 22252 evl1gsumd 22305 mdetunilem9 22568 ptcmpfi 23761 tmdgsum 24043 fsumcn 24821 ovolfiniun 25462 volfiniun 25508 itgfsum 25788 dvmptfsum 25939 jensen 26959 gsumvsca1 33289 gsumvsca2 33290 finixpnum 37777 matunitlindflem1 37788 pwslnm 43372 fnchoice 45310 dvmptfprod 46225 |
| Copyright terms: Public domain | W3C validator |