| 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 34048 | . . 3 ⊢ (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ)) |
| 3 | 2 | toponunii 22881 | . 2 ⊢ (ℝ × ℝ) = ∪ (𝐽 ×t 𝐽) |
| 4 | 3 | eqcomi 2745 | 1 ⊢ ∪ (𝐽 ×t 𝐽) = (ℝ × ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ∪ cuni 4850 × cxp 5629 ran crn 5632 ‘cfv 6498 (class class class)co 7367 ℝcr 11037 (,)cioo 13298 topGenctg 17400 ×t ctx 23525 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-pre-lttri 11112 ax-pre-lttrn 11113 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-ov 7370 df-oprab 7371 df-mpo 7372 df-1st 7942 df-2nd 7943 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-ioo 13302 df-topgen 17406 df-top 22859 df-topon 22876 df-bases 22911 df-tx 23527 |
| This theorem is referenced by: dya2iocnei 34426 sxbrsiga 34434 |
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