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Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > rrexttps | Structured version Visualization version GIF version |
Description: An extension of ℝ is a topological space. (Contributed by Thierry Arnoux, 7-Sep-2018.) |
Ref | Expression |
---|---|
rrexttps | ⊢ (𝑅 ∈ ℝExt → 𝑅 ∈ TopSp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rrextnrg 31352 | . . 3 ⊢ (𝑅 ∈ ℝExt → 𝑅 ∈ NrmRing) | |
2 | nrgngp 23268 | . . 3 ⊢ (𝑅 ∈ NrmRing → 𝑅 ∈ NrmGrp) | |
3 | ngpxms 23207 | . . 3 ⊢ (𝑅 ∈ NrmGrp → 𝑅 ∈ ∞MetSp) | |
4 | 1, 2, 3 | 3syl 18 | . 2 ⊢ (𝑅 ∈ ℝExt → 𝑅 ∈ ∞MetSp) |
5 | xmstps 23060 | . 2 ⊢ (𝑅 ∈ ∞MetSp → 𝑅 ∈ TopSp) | |
6 | 4, 5 | syl 17 | 1 ⊢ (𝑅 ∈ ℝExt → 𝑅 ∈ TopSp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2111 TopSpctps 21537 ∞MetSpcxms 22924 NrmGrpcngp 23184 NrmRingcnrg 23186 ℝExt crrext 31345 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-rab 3115 df-v 3443 df-un 3886 df-in 3888 df-ss 3898 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-xp 5525 df-co 5528 df-res 5531 df-iota 6283 df-fv 6332 df-xms 22927 df-ms 22928 df-ngp 23190 df-nrg 23192 df-rrext 31350 |
This theorem is referenced by: (None) |
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