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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 34529 | . . 3 ⊢ (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ)) |
| 3 | 2 | toponunii 23227 | . 2 ⊢ (ℝ × ℝ) = ∪ (𝐽 ×t 𝐽) |
| 4 | 3 | eqcomi 2770 | 1 ⊢ ∪ (𝐽 ×t 𝐽) = (ℝ × ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∪ cuni 4867 × cxp 5649 ran crn 5652 ‘cfv 6537 (class class class)co 7418 ℝcr 11192 (,)cioo 13469 topGenctg 17601 ×t ctx 23872 |
| 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-topgen 17607 df-top 23205 df-topon 23222 df-bases 23257 df-tx 23874 |
| This theorem is used by: dya2iocnei 34907 sxbrsiga 34915 |
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