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Mirrors > Home > MPE Home > Th. List > Mathboxes > axunprim | Structured version Visualization version GIF version |
Description: ax-un 7566 without distinct variable conditions or defined symbols. (Contributed by Scott Fenton, 13-Oct-2010.) |
Ref | Expression |
---|---|
axunprim | ⊢ ¬ ∀𝑥 ¬ ∀𝑦(¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | axunnd 10283 | . 2 ⊢ ∃𝑥∀𝑦(∃𝑥(𝑦 ∈ 𝑥 ∧ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥) | |
2 | df-an 396 | . . . . . . . 8 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ 𝑧) ↔ ¬ (𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧)) | |
3 | 2 | exbii 1851 | . . . . . . 7 ⊢ (∃𝑥(𝑦 ∈ 𝑥 ∧ 𝑥 ∈ 𝑧) ↔ ∃𝑥 ¬ (𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧)) |
4 | exnal 1830 | . . . . . . 7 ⊢ (∃𝑥 ¬ (𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) ↔ ¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧)) | |
5 | 3, 4 | bitri 274 | . . . . . 6 ⊢ (∃𝑥(𝑦 ∈ 𝑥 ∧ 𝑥 ∈ 𝑧) ↔ ¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧)) |
6 | 5 | imbi1i 349 | . . . . 5 ⊢ ((∃𝑥(𝑦 ∈ 𝑥 ∧ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥) ↔ (¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥)) |
7 | 6 | albii 1823 | . . . 4 ⊢ (∀𝑦(∃𝑥(𝑦 ∈ 𝑥 ∧ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥) ↔ ∀𝑦(¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥)) |
8 | 7 | exbii 1851 | . . 3 ⊢ (∃𝑥∀𝑦(∃𝑥(𝑦 ∈ 𝑥 ∧ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥) ↔ ∃𝑥∀𝑦(¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥)) |
9 | df-ex 1784 | . . 3 ⊢ (∃𝑥∀𝑦(¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥) ↔ ¬ ∀𝑥 ¬ ∀𝑦(¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥)) | |
10 | 8, 9 | bitri 274 | . 2 ⊢ (∃𝑥∀𝑦(∃𝑥(𝑦 ∈ 𝑥 ∧ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥) ↔ ¬ ∀𝑥 ¬ ∀𝑦(¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥)) |
11 | 1, 10 | mpbi 229 | 1 ⊢ ¬ ∀𝑥 ¬ ∀𝑦(¬ ∀𝑥(𝑦 ∈ 𝑥 → ¬ 𝑥 ∈ 𝑧) → 𝑦 ∈ 𝑥) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∀wal 1537 ∃wex 1783 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-13 2372 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 ax-un 7566 ax-reg 9281 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-br 5071 df-opab 5133 df-eprel 5486 df-fr 5535 |
This theorem is referenced by: (None) |
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