| Mathbox for Peter Mazsa |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > cosscnvex | Structured version Visualization version GIF version | ||
| Description: If 𝐴 is a set then the class of cosets by the converse of 𝐴 is a set. (Contributed by Peter Mazsa, 18-Oct-2019.) |
| Ref | Expression |
|---|---|
| cosscnvex | ⊢ (𝐴 ∈ 𝑉 → ≀ ◡𝐴 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnvexg 7936 | . 2 ⊢ (𝐴 ∈ 𝑉 → ◡𝐴 ∈ V) | |
| 2 | cossex 39442 | . 2 ⊢ (◡𝐴 ∈ V → ≀ ◡𝐴 ∈ V) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝐴 ∈ 𝑉 → ≀ ◡𝐴 ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 Vcvv 3450 ◡ccnv 5649 ≀ ccoss 39116 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pow 5326 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-coss 39434 |
| This theorem is used by: eldisjsdisj 39757 |
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