Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > ssrexr | Structured version Visualization version GIF version |
Description: A subset of the reals is a subset of the extended reals. (Contributed by Glauco Siliprandi, 2-Jan-2022.) |
Ref | Expression |
---|---|
ssrexr.1 | ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
Ref | Expression |
---|---|
ssrexr | ⊢ (𝜑 → 𝐴 ⊆ ℝ*) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssrexr.1 | . 2 ⊢ (𝜑 → 𝐴 ⊆ ℝ) | |
2 | ressxr 10685 | . 2 ⊢ ℝ ⊆ ℝ* | |
3 | 1, 2 | sstrdi 3979 | 1 ⊢ (𝜑 → 𝐴 ⊆ ℝ*) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ⊆ wss 3936 ℝcr 10536 ℝ*cxr 10674 |
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 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-v 3496 df-un 3941 df-in 3943 df-ss 3952 df-xr 10679 |
This theorem is referenced by: limsuppnfdlem 42002 liminfval2 42069 |
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