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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 33865 | . . 3 ⊢ (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ)) |
3 | 2 | toponunii 22938 | . 2 ⊢ (ℝ × ℝ) = ∪ (𝐽 ×t 𝐽) |
4 | 3 | eqcomi 2744 | 1 ⊢ ∪ (𝐽 ×t 𝐽) = (ℝ × ℝ) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∪ cuni 4912 × cxp 5687 ran crn 5690 ‘cfv 6563 (class class class)co 7431 ℝcr 11152 (,)cioo 13384 topGenctg 17484 ×t ctx 23584 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 ax-cnex 11209 ax-resscn 11210 ax-pre-lttri 11227 ax-pre-lttrn 11228 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-po 5597 df-so 5598 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-ov 7434 df-oprab 7435 df-mpo 7436 df-1st 8013 df-2nd 8014 df-er 8744 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11295 df-mnf 11296 df-xr 11297 df-ltxr 11298 df-le 11299 df-ioo 13388 df-topgen 17490 df-top 22916 df-topon 22933 df-bases 22969 df-tx 23586 |
This theorem is referenced by: dya2iocnei 34264 sxbrsiga 34272 |
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