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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 17602 | . . 3 ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐽 ↾t 𝐵) = ran (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵))) | |
| 2 | 1 | eleq2d 2846 | . 2 ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∈ (𝐽 ↾t 𝐵) ↔ 𝐴 ∈ ran (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)))) |
| 3 | eqid 2760 | . . 3 ⊢ (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)) = (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)) | |
| 4 | vex 3454 | . . . 4 ⊢ 𝑥 ∈ V | |
| 5 | 4 | inex1 5276 | . . 3 ⊢ (𝑥 ∩ 𝐵) ∈ V |
| 6 | 3, 5 | elrnmpti 5943 | . 2 ⊢ (𝐴 ∈ ran (𝑥 ∈ 𝐽 ↦ (𝑥 ∩ 𝐵)) ↔ ∃𝑥 ∈ 𝐽 𝐴 = (𝑥 ∩ 𝐵)) |
| 7 | 2, 6 | bitrdi 290 | 1 ⊢ ((𝐽 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∈ (𝐽 ↾t 𝐵) ↔ ∃𝑥 ∈ 𝐽 𝐴 = (𝑥 ∩ 𝐵))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1569 ∈ wcel 2144 ∃wrex 3086 ∩ cin 4089 ↦ cmpt 5185 ran crn 5651 (class class class)co 7420 ↾t crest 17596 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-rest 17598 |
| This theorem is used by: elrestr 17604 restsspw 17607 firest 17608 restbas 23481 restsn 23493 restcld 23495 restopnb 23498 ssrest 23499 neitr 23503 restntr 23505 cnrest2 23609 cnpresti 23611 cnprest 23612 cnprest2 23613 lmss 23621 cmpsublem 23722 cmpsub 23723 connsuba 23743 1stcrest 23776 subislly 23805 cldllycmp 23819 txrest 23955 trfbas2 24167 trfbas 24168 trfil2 24211 flimrest 24307 fclsrest 24348 cnextcn 24391 tsmssubm 24467 trust 24553 restutop 24561 restutopopn 24562 trcfilu 24617 metrest 24848 xrtgioo 25131 xrge0tsms 25159 icoopnst 25265 iocopnst 25266 subopnmbl 25930 mbfimaopn2 25983 xrlimcnp 27301 xrge0tsmsd 33680 rspectopn 34545 bj-restsn 38095 bj-rest10 38101 bj-restn0 38103 bj-restpw 38105 bj-rest0 38106 bj-restb 38107 bj-restuni 38110 bj-restreg 38112 ptrest 38630 poimirlem29 38660 elrestd 46216 restuni3 46226 restsubel 46261 icccncfext 46990 subsaliuncl 47461 subsalsal 47462 salrestss 47464 sssmf 47841 incsmf 47845 decsmf 47870 smflimlem6 47879 smfco 47905 smfpimcc 47911 |
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