| 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 7917 | . 2 ⊢ (𝐴 ∈ 𝑉 → ◡𝐴 ∈ V) | |
| 2 | cossex 39158 | . 2 ⊢ (◡𝐴 ∈ V → ≀ ◡𝐴 ∈ V) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝐴 ∈ 𝑉 → ≀ ◡𝐴 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2143 Vcvv 3455 ◡ccnv 5660 ≀ ccoss 38832 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-pow 5336 ax-pr 5404 ax-un 7732 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-coss 39150 |
| This theorem is referenced by: eldisjsdisj 39473 |
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