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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 13571 | . . . . 5 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ | |
| 2 | 1 | fdmi 6719 | . . . 4 ⊢ dom (,) = (ℝ* × ℝ*) |
| 3 | 2 | imaeq2i 6050 | . . 3 ⊢ ((,) “ dom (,)) = ((,) “ (ℝ* × ℝ*)) |
| 4 | imadmrn 6067 | . . 3 ⊢ ((,) “ dom (,)) = ran (,) | |
| 5 | 3, 4 | eqtr3i 2786 | . 2 ⊢ ((,) “ (ℝ* × ℝ*)) = ran (,) |
| 6 | ssid 3953 | . . 3 ⊢ ℝ* ⊆ ℝ* | |
| 7 | 6 | qtopbaslem 25070 | . 2 ⊢ ((,) “ (ℝ* × ℝ*)) ∈ TopBases |
| 8 | 5, 7 | eqeltrri 2858 | 1 ⊢ ran (,) ∈ TopBases |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 𝒫 cpw 4557 × cxp 5649 dom cdm 5651 ran crn 5652 “ cima 5654 ℝcr 11192 ℝ*cxr 11335 (,)cioo 13469 TopBasesctb 23256 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-cnex 11249 ax-resscn 11250 ax-pre-lttri 11267 ax-pre-lttrn 11268 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7421 df-oprab 7422 df-mpo 7423 df-1st 7999 df-2nd 8000 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-ioo 13473 df-bases 23257 |
| This theorem is used by: retop 25073 uniretop 25074 iooretop 25077 qdensere 25081 tgioo 25108 xrtgioo 25119 bndth 25272 ovolicc2 25836 cncombf 25972 cnmbf 25973 elmbfmvol2 34892 iccllysconn 35994 rellysconn 35995 mblfinlem3 38557 mblfinlem4 38558 ismblfin 38559 cnambfre 38566 |
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