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Mirrors > Home > MPE Home > Th. List > Mathboxes > refrelcosslem | Structured version Visualization version GIF version |
Description: Lemma for the left side of the refrelcoss3 35234 reflexivity theorem. (Contributed by Peter Mazsa, 1-Apr-2019.) |
Ref | Expression |
---|---|
refrelcosslem | ⊢ ∀𝑥 ∈ dom ≀ 𝑅𝑥 ≀ 𝑅𝑥 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ralel 3116 | . 2 ⊢ ∀𝑥 ∈ dom ≀ 𝑅𝑥 ∈ dom ≀ 𝑅 | |
2 | eldmcoss2 35230 | . . . 4 ⊢ (𝑥 ∈ V → (𝑥 ∈ dom ≀ 𝑅 ↔ 𝑥 ≀ 𝑅𝑥)) | |
3 | 2 | elv 3442 | . . 3 ⊢ (𝑥 ∈ dom ≀ 𝑅 ↔ 𝑥 ≀ 𝑅𝑥) |
4 | 3 | ralbii 3132 | . 2 ⊢ (∀𝑥 ∈ dom ≀ 𝑅𝑥 ∈ dom ≀ 𝑅 ↔ ∀𝑥 ∈ dom ≀ 𝑅𝑥 ≀ 𝑅𝑥) |
5 | 1, 4 | mpbi 231 | 1 ⊢ ∀𝑥 ∈ dom ≀ 𝑅𝑥 ≀ 𝑅𝑥 |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 207 ∈ wcel 2081 ∀wral 3105 Vcvv 3437 class class class wbr 4962 dom cdm 5443 ≀ ccoss 34985 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1777 ax-4 1791 ax-5 1888 ax-6 1947 ax-7 1992 ax-8 2083 ax-9 2091 ax-10 2112 ax-11 2126 ax-12 2141 ax-13 2344 ax-ext 2769 ax-sep 5094 ax-nul 5101 ax-pr 5221 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 843 df-3an 1082 df-tru 1525 df-ex 1762 df-nf 1766 df-sb 2043 df-mo 2576 df-eu 2612 df-clab 2776 df-cleq 2788 df-clel 2863 df-nfc 2935 df-ral 3110 df-rab 3114 df-v 3439 df-dif 3862 df-un 3864 df-in 3866 df-ss 3874 df-nul 4212 df-if 4382 df-sn 4473 df-pr 4475 df-op 4479 df-br 4963 df-opab 5025 df-cnv 5451 df-co 5452 df-dm 5453 df-rn 5454 df-coss 35190 |
This theorem is referenced by: refrelcoss3 35234 eqvrelcoss3 35384 |
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