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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 4097 | . 2 ⊢ (𝑥 = 𝐴 → (0 < 𝑥 ↔ 0 < 𝐴)) | |
| 2 | df-rp 9950 | . 2 ⊢ ℝ+ = {𝑥 ∈ ℝ ∣ 0 < 𝑥} | |
| 3 | 1, 2 | elrab2 2966 | 1 ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ↔ wb 105 ∈ wcel 2202 class class class wbr 4093 ℝcr 8091 0cc0 8092 < clt 8273 ℝ+crp 9949 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-rab 2520 df-v 2805 df-un 3205 df-sn 3679 df-pr 3680 df-op 3682 df-br 4094 df-rp 9950 |
| This theorem is referenced by: elrpii 9952 nnrp 9959 rpgt0 9961 rpregt0 9963 ralrp 9971 rexrp 9972 rpaddcl 9973 rpmulcl 9974 rpdivcl 9975 rpgecl 9978 rphalflt 9979 ge0p1rp 9981 rpnegap 9982 negelrp 9983 ltsubrp 9986 ltaddrp 9987 difrp 9988 elrpd 9989 iccdil 10294 icccntr 10296 dfrp2 10586 expgt0 10897 sqrtdiv 11682 mulcn2 11952 ef01bndlem 12397 nconstwlpolem 16798 |
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