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Mirrors > Home > MPE Home > Th. List > Mathboxes > elrels2 | Structured version Visualization version GIF version |
Description: The element of the relations class (df-rels 36993) and the relation predicate (df-rel 5641) are the same when 𝑅 is a set. (Contributed by Peter Mazsa, 14-Jun-2018.) |
Ref | Expression |
---|---|
elrels2 | ⊢ (𝑅 ∈ 𝑉 → (𝑅 ∈ Rels ↔ 𝑅 ⊆ (V × V))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rels 36993 | . . 3 ⊢ Rels = 𝒫 (V × V) | |
2 | 1 | eleq2i 2826 | . 2 ⊢ (𝑅 ∈ Rels ↔ 𝑅 ∈ 𝒫 (V × V)) |
3 | elpwg 4564 | . 2 ⊢ (𝑅 ∈ 𝑉 → (𝑅 ∈ 𝒫 (V × V) ↔ 𝑅 ⊆ (V × V))) | |
4 | 2, 3 | bitrid 283 | 1 ⊢ (𝑅 ∈ 𝑉 → (𝑅 ∈ Rels ↔ 𝑅 ⊆ (V × V))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∈ wcel 2107 Vcvv 3444 ⊆ wss 3911 𝒫 cpw 4561 × cxp 5632 Rels crels 36682 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-ext 2704 |
This theorem depends on definitions: df-bi 206 df-an 398 df-tru 1545 df-ex 1783 df-sb 2069 df-clab 2711 df-cleq 2725 df-clel 2811 df-v 3446 df-in 3918 df-ss 3928 df-pw 4563 df-rels 36993 |
This theorem is referenced by: elrelsrel 36995 |
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