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Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-rabtr | Structured version Visualization version GIF version |
Description: Restricted class abstraction with true formula. (Contributed by BJ, 22-Apr-2019.) |
Ref | Expression |
---|---|
bj-rabtr | ⊢ {𝑥 ∈ 𝐴 ∣ ⊤} = 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssrab2 4077 | . 2 ⊢ {𝑥 ∈ 𝐴 ∣ ⊤} ⊆ 𝐴 | |
2 | ssid 4004 | . . 3 ⊢ 𝐴 ⊆ 𝐴 | |
3 | tru 1545 | . . . 4 ⊢ ⊤ | |
4 | 3 | rgenw 3065 | . . 3 ⊢ ∀𝑥 ∈ 𝐴 ⊤ |
5 | ssrab 4070 | . . 3 ⊢ (𝐴 ⊆ {𝑥 ∈ 𝐴 ∣ ⊤} ↔ (𝐴 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝐴 ⊤)) | |
6 | 2, 4, 5 | mpbir2an 709 | . 2 ⊢ 𝐴 ⊆ {𝑥 ∈ 𝐴 ∣ ⊤} |
7 | 1, 6 | eqssi 3998 | 1 ⊢ {𝑥 ∈ 𝐴 ∣ ⊤} = 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1541 ⊤wtru 1542 ∀wral 3061 {crab 3432 ⊆ wss 3948 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-tru 1544 df-ex 1782 df-nf 1786 df-sb 2068 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ral 3062 df-rab 3433 df-v 3476 df-in 3955 df-ss 3965 |
This theorem is referenced by: (None) |
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