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| Mirrors > Home > MPE Home > Th. List > elrest | Structured version Visualization version GIF version | ||
| Description: The predicate "is an open set of a subspace topology". (Contributed by FL, 5-Jan-2009.) (Revised by Mario Carneiro, 15-Dec-2013.) |
| Ref | Expression |
|---|---|
| elrest | ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∈ (𝐽 ↾t 𝐵) ↔ ∃𝑥 ∈ 𝐽 𝐴 = (𝑥 ∩ 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | restval 17380 | . . 3 ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐽 ↾t 𝐵) = ran (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵))) | |
| 2 | 1 | eleq2d 2823 | . 2 ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∈ (𝐽 ↾t 𝐵) ↔ 𝐴 ∈ ran (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)))) |
| 3 | eqid 2737 | . . 3 ⊢ (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)) = (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)) | |
| 4 | vex 3434 | . . . 4 ⊢ 𝑥 ∈ V | |
| 5 | 4 | inex1 5254 | . . 3 ⊢ (𝑥 ∩ 𝐵) ∈ V |
| 6 | 3, 5 | elrnmpti 5911 | . 2 ⊢ (𝐴 ∈ ran (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)) ↔ ∃𝑥 ∈ 𝐽 𝐴 = (𝑥 ∩ 𝐵)) |
| 7 | 2, 6 | bitrdi 287 | 1 ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∈ (𝐽 ↾t 𝐵) ↔ ∃𝑥 ∈ 𝐽 𝐴 = (𝑥 ∩ 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ∃wrex 3062 ∩ cin 3889 ↦ cmpt 5167 ran crn 5625 (class class class)co 7360 ↾t crest 17374 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pr 5370 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7363 df-oprab 7364 df-mpo 7365 df-rest 17376 |
| This theorem is referenced by: elrestr 17382 restsspw 17385 firest 17386 restbas 23133 restsn 23145 restcld 23147 restopnb 23150 ssrest 23151 neitr 23155 restntr 23157 cnrest2 23261 cnpresti 23263 cnprest 23264 cnprest2 23265 lmss 23273 cmpsublem 23374 cmpsub 23375 connsuba 23395 1stcrest 23428 subislly 23456 cldllycmp 23470 txrest 23606 trfbas2 23818 trfbas 23819 trfil2 23862 flimrest 23958 fclsrest 23999 cnextcn 24042 tsmssubm 24118 trust 24204 restutop 24212 restutopopn 24213 trcfilu 24268 metrest 24499 xrtgioo 24782 xrge0tsms 24810 icoopnst 24916 iocopnst 24917 subopnmbl 25581 mbfimaopn2 25634 xrlimcnp 26945 xrge0tsmsd 33149 rspectopn 34027 bj-restsn 37410 bj-rest10 37416 bj-restn0 37418 bj-restpw 37420 bj-rest0 37421 bj-restb 37422 bj-restuni 37425 bj-restreg 37427 ptrest 37954 poimirlem29 37984 elrestd 45556 restuni3 45566 restsubel 45601 icccncfext 46333 subsaliuncl 46804 subsalsal 46805 salrestss 46807 sssmf 47184 incsmf 47188 decsmf 47213 smflimlem6 47222 smfco 47248 smfpimcc 47254 |
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