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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 14909 | . . . 4 ⊢ Clsd Fn Top | |
| 2 | fnrel 5435 | . . . 4 ⊢ (Clsd Fn Top → Rel Clsd) | |
| 3 | 1, 2 | ax-mp 5 | . . 3 ⊢ Rel Clsd |
| 4 | relelfvdm 5680 | . . 3 ⊢ ((Rel Clsd ∧ 𝐶 ∈ (Clsd‘𝐽)) → 𝐽 ∈ dom Clsd) | |
| 5 | 3, 4 | mpan 424 | . 2 ⊢ (𝐶 ∈ (Clsd‘𝐽) → 𝐽 ∈ dom Clsd) |
| 6 | fndm 5436 | . . 3 ⊢ (Clsd Fn Top → dom Clsd = Top) | |
| 7 | 1, 6 | ax-mp 5 | . 2 ⊢ dom Clsd = Top |
| 8 | 5, 7 | eleqtrdi 2324 | 1 ⊢ (𝐶 ∈ (Clsd‘𝐽) → 𝐽 ∈ Top) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2202 dom cdm 4731 Rel wrel 4736 Fn wfn 5328 ‘cfv 5333 Topctop 14808 Clsdccld 14903 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-iota 5293 df-fun 5335 df-fn 5336 df-fv 5341 df-cld 14906 |
| This theorem is referenced by: cldss 14916 cldopn 14918 difopn 14919 uncld 14924 cldcls 14925 clsss2 14940 |
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