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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 17332 | . . 3 ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐽 ↾t 𝐵) = ran (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵))) | |
| 2 | 1 | eleq2d 2819 | . 2 ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∈ (𝐽 ↾t 𝐵) ↔ 𝐴 ∈ ran (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)))) |
| 3 | eqid 2733 | . . 3 ⊢ (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)) = (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)) | |
| 4 | vex 3441 | . . . 4 ⊢ 𝑥 ∈ V | |
| 5 | 4 | inex1 5257 | . . 3 ⊢ (𝑥 ∩ 𝐵) ∈ V |
| 6 | 3, 5 | elrnmpti 5906 | . 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 1541 ∈ wcel 2113 ∃wrex 3057 ∩ cin 3897 ↦ cmpt 5174 ran crn 5620 (class class class)co 7352 ↾t crest 17326 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5219 ax-sep 5236 ax-nul 5246 ax-pr 5372 ax-un 7674 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4475 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-id 5514 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-ov 7355 df-oprab 7356 df-mpo 7357 df-rest 17328 |
| This theorem is referenced by: elrestr 17334 restsspw 17337 firest 17338 restbas 23074 restsn 23086 restcld 23088 restopnb 23091 ssrest 23092 neitr 23096 restntr 23098 cnrest2 23202 cnpresti 23204 cnprest 23205 cnprest2 23206 lmss 23214 cmpsublem 23315 cmpsub 23316 connsuba 23336 1stcrest 23369 subislly 23397 cldllycmp 23411 txrest 23547 trfbas2 23759 trfbas 23760 trfil2 23803 flimrest 23899 fclsrest 23940 cnextcn 23983 tsmssubm 24059 trust 24145 restutop 24153 restutopopn 24154 trcfilu 24209 metrest 24440 xrtgioo 24723 xrge0tsms 24751 icoopnst 24864 iocopnst 24865 subopnmbl 25533 mbfimaopn2 25586 xrlimcnp 26906 xrge0tsmsd 33049 rspectopn 33901 bj-restsn 37147 bj-rest10 37153 bj-restn0 37155 bj-restpw 37157 bj-rest0 37158 bj-restb 37159 bj-restuni 37162 bj-restreg 37164 ptrest 37679 poimirlem29 37709 elrestd 45229 restuni3 45239 restsubel 45274 icccncfext 46009 subsaliuncl 46480 subsalsal 46481 salrestss 46483 sssmf 46860 incsmf 46864 decsmf 46889 smflimlem6 46898 smfco 46924 smfpimcc 46930 |
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