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| Mirrors > Home > ILE Home > Th. List > cldrcl | GIF version | ||
| Description: Reverse closure of the closed set operation. (Contributed by Stefan O'Rear, 22-Feb-2015.) |
| Ref | Expression |
|---|---|
| cldrcl | ⊢ (𝐶 ∈ (Clsd‘𝐽) → 𝐽 ∈ Top) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fncld 15199 | . . . 4 ⊢ Clsd Fn Top | |
| 2 | fnrel 5479 | . . . 4 ⊢ (Clsd Fn Top → Rel Clsd) | |
| 3 | 1, 2 | ax-mp 5 | . . 3 ⊢ Rel Clsd |
| 4 | relelfvdm 5727 | . . 3 ⊢ ((Rel Clsd ∧ 𝐶 ∈ (Clsd‘𝐽)) → 𝐽 ∈ dom Clsd) | |
| 5 | 3, 4 | mpan 428 | . 2 ⊢ (𝐶 ∈ (Clsd‘𝐽) → 𝐽 ∈ dom Clsd) |
| 6 | fndm 5480 | . . 3 ⊢ (Clsd Fn Top → dom Clsd = Top) | |
| 7 | 1, 6 | ax-mp 5 | . 2 ⊢ dom Clsd = Top |
| 8 | 5, 7 | eleqtrdi 2331 | 1 ⊢ (𝐶 ∈ (Clsd‘𝐽) → 𝐽 ∈ Top) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ∈ wcel 2209 dom cdm 4774 Rel wrel 4779 Fn wfn 5372 ‘cfv 5377 Topctop 15098 Clsdccld 15193 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-mpt 4194 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fn 5380 df-fv 5385 df-cld 15196 |
| This theorem is used by: cldss 15206 cldopn 15208 difopn 15209 uncld 15214 cldcls 15215 clsss2 15230 |
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