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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 13485 | . . . . 5 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ | |
| 2 | 1 | fdmi 6721 | . . . 4 ⊢ dom (,) = (ℝ* × ℝ*) |
| 3 | 2 | imaeq2i 6062 | . . 3 ⊢ ((,) “ dom (,)) = ((,) “ (ℝ* × ℝ*)) |
| 4 | imadmrn 6074 | . . 3 ⊢ ((,) “ dom (,)) = ran (,) | |
| 5 | 3, 4 | eqtr3i 2790 | . 2 ⊢ ((,) “ (ℝ* × ℝ*)) = ran (,) |
| 6 | ssid 3960 | . . 3 ⊢ ℝ* ⊆ ℝ* | |
| 7 | 6 | qtopbaslem 24944 | . 2 ⊢ ((,) “ (ℝ* × ℝ*)) ∈ TopBases |
| 8 | 5, 7 | eqeltrri 2862 | 1 ⊢ ran (,) ∈ TopBases |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2146 𝒫 cpw 4564 × cxp 5661 dom cdm 5663 ran crn 5664 “ cima 5666 ℝcr 11110 ℝ*cxr 11253 (,)cioo 13383 TopBasesctb 23131 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 ax-cnex 11167 ax-resscn 11168 ax-pre-lttri 11185 ax-pre-lttrn 11186 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-ov 7419 df-oprab 7420 df-mpo 7421 df-1st 7988 df-2nd 7989 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-pnf 11256 df-mnf 11257 df-xr 11258 df-ltxr 11259 df-le 11260 df-ioo 13387 df-bases 23132 |
| This theorem is used by: retop 24947 uniretop 24948 iooretop 24951 qdensere 24955 tgioo 24982 xrtgioo 24993 bndth 25146 ovolicc2 25710 cncombf 25846 cnmbf 25847 elmbfmvol2 34681 iccllysconn 35755 rellysconn 35756 mblfinlem3 38343 mblfinlem4 38344 ismblfin 38345 cnambfre 38352 |
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