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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 9721 | . 2 ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) | |
4 | 1, 2, 3 | mpbir2an 944 | 1 ⊢ 𝐴 ∈ ℝ+ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 2164 class class class wbr 4029 ℝcr 7871 0cc0 7872 < clt 8054 ℝ+crp 9719 |
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 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2175 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-rab 2481 df-v 2762 df-un 3157 df-sn 3624 df-pr 3625 df-op 3627 df-br 4030 df-rp 9720 |
This theorem is referenced by: 1rp 9723 2rp 9724 3rp 9725 resqrexlemnm 11162 resqrexlemga 11167 epr 11925 pirp 14924 coseq0negpitopi 14971 pigt3 14979 |
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