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| Mirrors > Home > MPE Home > Th. List > retopbas | Structured version Visualization version GIF version | ||
| Description: A basis for the standard topology on the reals. (Contributed by NM, 6-Feb-2007.) (Proof shortened by Mario Carneiro, 17-Jun-2014.) |
| Ref | Expression |
|---|---|
| retopbas | ⊢ ran (,) ∈ TopBases |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ioof 13582 | . . . . 5 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ | |
| 2 | 1 | fdmi 6722 | . . . 4 ⊢ dom (,) = (ℝ* × ℝ*) |
| 3 | 2 | imaeq2i 6049 | . . 3 ⊢ ((,) “ dom (,)) = ((,) “ (ℝ* × ℝ*)) |
| 4 | imadmrn 6066 | . . 3 ⊢ ((,) “ dom (,)) = ran (,) | |
| 5 | 3, 4 | eqtr3i 2785 | . 2 ⊢ ((,) “ (ℝ* × ℝ*)) = ran (,) |
| 6 | ssid 3930 | . . 3 ⊢ ℝ* ⊆ ℝ* | |
| 7 | 6 | qtopbaslem 25083 | . 2 ⊢ ((,) “ (ℝ* × ℝ*)) ∈ TopBases |
| 8 | 5, 7 | eqeltrri 2857 | 1 ⊢ ran (,) ∈ TopBases |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 𝒫 cpw 4556 × cxp 5648 dom cdm 5650 ran crn 5651 “ cima 5653 ℝcr 11203 ℝ*cxr 11346 (,)cioo 13480 TopBasesctb 23269 |
| 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-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7752 ax-cnex 11260 ax-resscn 11261 ax-pre-lttri 11278 ax-pre-lttrn 11279 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 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-nel 3062 df-ral 3077 df-rex 3087 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-pw 4558 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-po 5558 df-so 5559 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 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-ov 7424 df-oprab 7425 df-mpo 7426 df-1st 8002 df-2nd 8003 df-er 8721 df-en 8978 df-dom 8979 df-sdom 8980 df-pnf 11349 df-mnf 11350 df-xr 11351 df-ltxr 11352 df-le 11353 df-ioo 13484 df-bases 23270 |
| This theorem is used by: retop 25086 uniretop 25087 iooretop 25090 qdensere 25094 tgioo 25121 xrtgioo 25132 bndth 25285 ovolicc2 25849 cncombf 25985 cnmbf 25986 elmbfmvol2 34946 iccllysconn 36102 rellysconn 36103 mblfinlem3 38671 mblfinlem4 38672 ismblfin 38673 cnambfre 38680 |
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