Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > tpr2uni | 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 |
---|---|
tpr2uni | ⊢ ∪ (𝐽 ×t 𝐽) = (ℝ × ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | tpr2tp.0 | . . . 4 ⊢ 𝐽 = (topGen‘ran (,)) | |
2 | 1 | tpr2tp 31756 | . . 3 ⊢ (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ)) |
3 | 2 | toponunii 21973 | . 2 ⊢ (ℝ × ℝ) = ∪ (𝐽 ×t 𝐽) |
4 | 3 | eqcomi 2747 | 1 ⊢ ∪ (𝐽 ×t 𝐽) = (ℝ × ℝ) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1539 ∪ cuni 4836 × cxp 5578 ran crn 5581 ‘cfv 6418 (class class class)co 7255 ℝcr 10801 (,)cioo 13008 topGenctg 17065 ×t ctx 22619 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-pre-lttri 10876 ax-pre-lttrn 10877 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-po 5494 df-so 5495 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-1st 7804 df-2nd 7805 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-ioo 13012 df-topgen 17071 df-top 21951 df-topon 21968 df-bases 22004 df-tx 22621 |
This theorem is referenced by: dya2iocnei 32149 sxbrsiga 32157 |
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