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Mirrors > Home > MPE Home > Th. List > ruv | Structured version Visualization version GIF version |
Description: The Russell class is equal to the universe V. Exercise 5 of [TakeutiZaring] p. 22. (Contributed by Alan Sare, 4-Oct-2008.) |
Ref | Expression |
---|---|
ruv | ⊢ {𝑥 ∣ 𝑥 ∉ 𝑥} = V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 3492 | . . . 4 ⊢ 𝑥 ∈ V | |
2 | elirr 9666 | . . . . 5 ⊢ ¬ 𝑥 ∈ 𝑥 | |
3 | 2 | nelir 3055 | . . . 4 ⊢ 𝑥 ∉ 𝑥 |
4 | 1, 3 | 2th 264 | . . 3 ⊢ (𝑥 ∈ V ↔ 𝑥 ∉ 𝑥) |
5 | 4 | eqabi 2880 | . 2 ⊢ V = {𝑥 ∣ 𝑥 ∉ 𝑥} |
6 | 5 | eqcomi 2749 | 1 ⊢ {𝑥 ∣ 𝑥 ∉ 𝑥} = V |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∈ wcel 2108 {cab 2717 ∉ wnel 3052 Vcvv 3488 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-12 2178 ax-ext 2711 ax-sep 5317 ax-pr 5447 ax-reg 9661 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-tru 1540 df-ex 1778 df-nf 1782 df-sb 2065 df-clab 2718 df-cleq 2732 df-clel 2819 df-nel 3053 df-ral 3068 df-rex 3077 df-v 3490 df-un 3981 df-sn 4649 df-pr 4651 |
This theorem is referenced by: ruALT 9672 |
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