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| Mirrors > Home > ILE Home > Th. List > elrpii | GIF version | ||
| Description: Membership in the set of positive reals. (Contributed by NM, 23-Feb-2008.) |
| Ref | Expression |
|---|---|
| elrpi.1 | ⊢ 𝐴 ∈ ℝ |
| elrpi.2 | ⊢ 0 < 𝐴 |
| Ref | Expression |
|---|---|
| elrpii | ⊢ 𝐴 ∈ ℝ+ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elrpi.1 | . 2 ⊢ 𝐴 ∈ ℝ | |
| 2 | elrpi.2 | . 2 ⊢ 0 < 𝐴 | |
| 3 | elrp 10035 | . 2 ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) | |
| 4 | 1, 2, 3 | mpbir2an 955 | 1 ⊢ 𝐴 ∈ ℝ+ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2209 class class class wbr 4125 ℝcr 8168 0cc0 8169 < clt 8350 ℝ+crp 10033 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rab 2537 df-v 2823 df-un 3224 df-sn 3711 df-pr 3712 df-op 3714 df-br 4126 df-rp 10034 |
| This theorem is referenced by: 1rp 10037 2rp 10038 3rp 10039 resqrexlemnm 11762 resqrexlemga 11767 epr 12527 ballotfilem2 13206 pirp 15813 coseq0negpitopi 15860 pigt3 15868 |
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