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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 4135 | . 2 ⊢ (𝑥 = 𝐴 → (0 < 𝑥 ↔ 0 < 𝐴)) | |
| 2 | df-rp 10072 | . 2 ⊢ ℝ+ = {𝑥 ∈ ℝ ∣ 0 < 𝑥} | |
| 3 | 1, 2 | elrab2 2985 | 1 ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∧ wa 104 ↔ wb 105 ∈ wcel 2209 class class class wbr 4131 ℝcr 8184 0cc0 8185 < clt 8366 ℝ+crp 10071 |
| This proof depends on 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 proof 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 3715 df-pr 3716 df-op 3718 df-br 4132 df-rp 10072 |
| This theorem is used by: elrpii 10074 nnrp 10081 rpgt0 10083 rpregt0 10085 ralrp 10093 rexrp 10094 rpaddcl 10095 rpmulcl 10096 rpdivcl 10097 rpgecl 10100 rphalflt 10101 ge0p1rp 10103 rpnegap 10104 negelrp 10105 ltsubrp 10108 ltaddrp 10109 difrp 10110 elrpd 10111 iccdil 10417 icccntr 10419 dfrp2 10715 expgt0 11030 sqrtdiv 11830 mulcn2 12103 ef01bndlem 12548 chtqub 16296 nconstwlpolem 17322 |
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