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| Mirrors > Home > ILE Home > Th. List > elrp | GIF version | ||
| Description: Membership in the set of positive reals. (Contributed by NM, 27-Oct-2007.) |
| Ref | Expression |
|---|---|
| elrp | ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | breq2 4088 | . 2 ⊢ (𝑥 = 𝐴 → (0 < 𝑥 ↔ 0 < 𝐴)) | |
| 2 | df-rp 9877 | . 2 ⊢ ℝ+ = {𝑥 ∈ ℝ ∣ 0 < 𝑥} | |
| 3 | 1, 2 | elrab2 2963 | 1 ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ↔ wb 105 ∈ wcel 2200 class class class wbr 4084 ℝcr 8019 0cc0 8020 < clt 8202 ℝ+crp 9876 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-rab 2517 df-v 2802 df-un 3202 df-sn 3673 df-pr 3674 df-op 3676 df-br 4085 df-rp 9877 |
| This theorem is referenced by: elrpii 9879 nnrp 9886 rpgt0 9888 rpregt0 9890 ralrp 9898 rexrp 9899 rpaddcl 9900 rpmulcl 9901 rpdivcl 9902 rpgecl 9905 rphalflt 9906 ge0p1rp 9908 rpnegap 9909 negelrp 9910 ltsubrp 9913 ltaddrp 9914 difrp 9915 elrpd 9916 iccdil 10221 icccntr 10223 dfrp2 10511 expgt0 10822 sqrtdiv 11590 mulcn2 11860 ef01bndlem 12304 nconstwlpolem 16579 |
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