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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 4129 | . 2 ⊢ (𝑥 = 𝐴 → (0 < 𝑥 ↔ 0 < 𝐴)) | |
| 2 | df-rp 10034 | . 2 ⊢ ℝ+ = {𝑥 ∈ ℝ ∣ 0 < 𝑥} | |
| 3 | 1, 2 | elrab2 2985 | 1 ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ↔ wb 105 ∈ 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: elrpii 10036 nnrp 10043 rpgt0 10045 rpregt0 10047 ralrp 10055 rexrp 10056 rpaddcl 10057 rpmulcl 10058 rpdivcl 10059 rpgecl 10062 rphalflt 10063 ge0p1rp 10065 rpnegap 10066 negelrp 10067 ltsubrp 10070 ltaddrp 10071 difrp 10072 elrpd 10073 iccdil 10379 icccntr 10381 dfrp2 10676 expgt0 10987 sqrtdiv 11786 mulcn2 12056 ef01bndlem 12501 nconstwlpolem 17020 |
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