| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > pr01ssre | Structured version Visualization version GIF version | ||
| Description: The range of the indicator function is a subset of ℝ. (Contributed by Thierry Arnoux, 14-Aug-2017.) |
| Ref | Expression |
|---|---|
| pr01ssre | ⊢ {0, 1} ⊆ ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 11132 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | 1re 11130 | . 2 ⊢ 1 ∈ ℝ | |
| 3 | prssi 4775 | . 2 ⊢ ((0 ∈ ℝ ∧ 1 ∈ ℝ) → {0, 1} ⊆ ℝ) | |
| 4 | 1, 2, 3 | mp2an 692 | 1 ⊢ {0, 1} ⊆ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2113 ⊆ wss 3899 {cpr 4580 ℝcr 11023 0cc0 11024 1c1 11025 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-i2m1 11092 ax-1ne0 11093 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-ne 2931 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-iota 6446 df-fv 6498 df-ov 7359 |
| This theorem is referenced by: fprodex01 32855 indsum 32891 indsumin 32892 circlemethnat 34747 |
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