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| Mirrors > Home > MPE Home > Th. List > Mathboxes > tpr2tp | Structured version Visualization version GIF version | ||
| Description: The usual topology on (ℝ × ℝ) is the product topology of the usual topology on ℝ. (Contributed by Thierry Arnoux, 21-Sep-2017.) |
| Ref | Expression |
|---|---|
| tpr2tp.0 | ⊢ 𝐽 = (topGen‘ran (,)) |
| Ref | Expression |
|---|---|
| tpr2tp | ⊢ (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | tpr2tp.0 | . . 3 ⊢ 𝐽 = (topGen‘ran (,)) | |
| 2 | retopon 24746 | . . 3 ⊢ (topGen‘ran (,)) ∈ (TopOn‘ℝ) | |
| 3 | 1, 2 | eqeltri 2835 | . 2 ⊢ 𝐽 ∈ (TopOn‘ℝ) |
| 4 | txtopon 23574 | . 2 ⊢ ((𝐽 ∈ (TopOn‘ℝ) ∧ 𝐽 ∈ (TopOn‘ℝ)) → (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ))) | |
| 5 | 3, 3, 4 | mp2an 698 | 1 ⊢ (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ)) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1547 ∈ wcel 2119 × cxp 5616 ran crn 5619 ‘cfv 6485 (class class class)co 7356 ℝcr 11028 (,)cioo 13289 topGenctg 17391 TopOnctopon 22893 ×t ctx 23543 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-cnex 11085 ax-resscn 11086 ax-pre-lttri 11103 ax-pre-lttrn 11104 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-po 5526 df-so 5527 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1st 7931 df-2nd 7932 df-er 8633 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-ioo 13293 df-topgen 17397 df-top 22877 df-topon 22894 df-bases 22929 df-tx 23545 |
| This theorem is referenced by: tpr2uni 34089 sxbrsigalem4 34471 sxbrsiga 34474 |
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