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| Mirrors > Home > MPE Home > Th. List > findcard2s | Structured version Visualization version GIF version | ||
| Description: Variation of findcard2 9096 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 413 | . . 3 ⊢ (𝑦 ∈ Fin → (¬ 𝑧 ∈ 𝑦 → (𝜒 → 𝜃))) |
| 8 | snssi 4724 | . . . . . . . 8 ⊢ (𝑧 ∈ 𝑦 → {𝑧} ⊆ 𝑦) | |
| 9 | ssequn1 4122 | . . . . . . . 8 ⊢ ({𝑧} ⊆ 𝑦 ↔ ({𝑧} ∪ 𝑦) = 𝑦) | |
| 10 | 8, 9 | sylib 219 | . . . . . . 7 ⊢ (𝑧 ∈ 𝑦 → ({𝑧} ∪ 𝑦) = 𝑦) |
| 11 | uncom 4095 | . . . . . . 7 ⊢ ({𝑧} ∪ 𝑦) = (𝑦 ∪ {𝑧}) | |
| 12 | 10, 11 | eqtr3di 2790 | . . . . . 6 ⊢ (𝑧 ∈ 𝑦 → 𝑦 = (𝑦 ∪ {𝑧})) |
| 13 | vex 3436 | . . . . . . 7 ⊢ 𝑦 ∈ V | |
| 14 | 13 | eqvinc 3594 | . . . . . 6 ⊢ (𝑦 = (𝑦 ∪ {𝑧}) ↔ ∃𝑥(𝑥 = 𝑦 ∧ 𝑥 = (𝑦 ∪ {𝑧}))) |
| 15 | 12, 14 | sylib 219 | . . . . 5 ⊢ (𝑧 ∈ 𝑦 → ∃𝑥(𝑥 = 𝑦 ∧ 𝑥 = (𝑦 ∪ {𝑧}))) |
| 16 | 2 | bicomd 224 | . . . . . . 7 ⊢ (𝑥 = 𝑦 → (𝜒 ↔ 𝜑)) |
| 17 | 16, 3 | sylan9bb 514 | . . . . . 6 ⊢ ((𝑥 = 𝑦 ∧ 𝑥 = (𝑦 ∪ {𝑧})) → (𝜒 ↔ 𝜃)) |
| 18 | 17 | exlimiv 1937 | . . . . 5 ⊢ (∃𝑥(𝑥 = 𝑦 ∧ 𝑥 = (𝑦 ∪ {𝑧})) → (𝜒 ↔ 𝜃)) |
| 19 | 15, 18 | syl 17 | . . . 4 ⊢ (𝑧 ∈ 𝑦 → (𝜒 ↔ 𝜃)) |
| 20 | 19 | biimpd 230 | . . 3 ⊢ (𝑧 ∈ 𝑦 → (𝜒 → 𝜃)) |
| 21 | 7, 20 | pm2.61d2 182 | . 2 ⊢ (𝑦 ∈ Fin → (𝜒 → 𝜃)) |
| 22 | 1, 2, 3, 4, 5, 21 | findcard2 9096 | 1 ⊢ (𝐴 ∈ Fin → 𝜏) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 207 ∧ wa 396 = wceq 1547 ∃wex 1786 ∈ wcel 2119 ∪ cun 3888 ⊆ wss 3890 ∅c0 4268 {csn 4562 Fincfn 8890 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-nul 5235 ax-pr 5369 ax-un 7685 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-ral 3055 df-rex 3065 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-tr 5187 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 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-om 7814 df-en 8891 df-fin 8894 |
| This theorem is referenced by: findcard2d 9098 unfi 9102 ac6sfi 9191 fodomfi 9219 domunfican 9229 fodomfiOLD 9237 hashxplem 14393 hashmap 14395 hashbc 14413 hashf1lem2 14416 hashf1 14417 fsum2d 15731 fsumabs 15762 fsumrlim 15772 fsumo1 15773 fsumiun 15782 incexclem 15799 fprod2d 15944 coprmprod 16628 coprmproddvds 16630 gsum2dlem2 19944 ablfac1eulem 20047 gsumle 20118 mplcoe1 22020 mplcoe5 22023 coe1fzgsumd 22297 evl1gsumd 22350 mdetunilem9 22610 ptcmpfi 23803 tmdgsum 24085 fsumcn 24862 ovolfiniun 25493 volfiniun 25539 itgfsum 25819 dvmptfsum 25967 jensen 26977 gsumvsca1 33314 gsumvsca2 33315 finixpnum 37973 matunitlindflem1 37984 pwslnm 43540 fnchoice 45478 dvmptfprod 46389 |
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