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| Mirrors > Home > MPE Home > Th. List > fiprc | Structured version Visualization version GIF version | ||
| Description: The class of finite sets is a proper class. (Contributed by Jeff Hankins, 3-Oct-2008.) |
| Ref | Expression |
|---|---|
| fiprc | ⊢ Fin ∉ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | snnex 7753 | . 2 ⊢ {𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ∉ V | |
| 2 | snfi 9036 | . . . . . . . 8 ⊢ {𝑦} ∈ Fin | |
| 3 | eleq1 2851 | . . . . . . . 8 ⊢ (𝑥 = {𝑦} → (𝑥 ∈ Fin ↔ {𝑦} ∈ Fin)) | |
| 4 | 2, 3 | mpbiri 261 | . . . . . . 7 ⊢ (𝑥 = {𝑦} → 𝑥 ∈ Fin) |
| 5 | 4 | exlimiv 1960 | . . . . . 6 ⊢ (∃𝑦 𝑥 = {𝑦} → 𝑥 ∈ Fin) |
| 6 | 5 | abssi 4022 | . . . . 5 ⊢ {𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ⊆ Fin |
| 7 | ssexg 5290 | . . . . 5 ⊢ (({𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ⊆ Fin ∧ Fin ∈ V) → {𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ∈ V) | |
| 8 | 6, 7 | mpan 702 | . . . 4 ⊢ (Fin ∈ V → {𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ∈ V) |
| 9 | 8 | con3i 155 | . . 3 ⊢ (¬ {𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ∈ V → ¬ Fin ∈ V) |
| 10 | df-nel 3065 | . . 3 ⊢ ({𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ∉ V ↔ ¬ {𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ∈ V) | |
| 11 | df-nel 3065 | . . 3 ⊢ (Fin ∉ V ↔ ¬ Fin ∈ V) | |
| 12 | 9, 10, 11 | 3imtr4i 295 | . 2 ⊢ ({𝑥 ∣ ∃𝑦 𝑥 = {𝑦}} ∉ V → Fin ∉ V) |
| 13 | 1, 12 | ax-mp 5 | 1 ⊢ Fin ∉ V |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 = wceq 1570 ∃wex 1809 ∈ wcel 2143 {cab 2741 ∉ wnel 3064 Vcvv 3455 ⊆ wss 3905 {csn 4589 Fincfn 8939 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-11 2192 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 ax-un 7732 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-mo 2567 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-om 7859 df-1o 8449 df-en 8940 df-fin 8943 |
| This theorem is referenced by: (None) |
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