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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 23372 | . . 3 ⊢ (topGen‘ran (,)) ∈ (TopOn‘ℝ) | |
3 | 1, 2 | eqeltri 2909 | . 2 ⊢ 𝐽 ∈ (TopOn‘ℝ) |
4 | txtopon 22199 | . 2 ⊢ ((𝐽 ∈ (TopOn‘ℝ) ∧ 𝐽 ∈ (TopOn‘ℝ)) → (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ))) | |
5 | 3, 3, 4 | mp2an 690 | 1 ⊢ (𝐽 ×t 𝐽) ∈ (TopOn‘(ℝ × ℝ)) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∈ wcel 2114 × cxp 5553 ran crn 5556 ‘cfv 6355 (class class class)co 7156 ℝcr 10536 (,)cioo 12739 topGenctg 16711 TopOnctopon 21518 ×t ctx 22168 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-cnex 10593 ax-resscn 10594 ax-pre-lttri 10611 ax-pre-lttrn 10612 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-po 5474 df-so 5475 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-ov 7159 df-oprab 7160 df-mpo 7161 df-1st 7689 df-2nd 7690 df-er 8289 df-en 8510 df-dom 8511 df-sdom 8512 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-ioo 12743 df-topgen 16717 df-top 21502 df-topon 21519 df-bases 21554 df-tx 22170 |
This theorem is referenced by: tpr2uni 31148 sxbrsigalem4 31545 sxbrsiga 31548 |
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