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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 4134 | . 2 ⊢ (𝑥 = 𝐴 → (0 < 𝑥 ↔ 0 < 𝐴)) | |
| 2 | df-rp 10066 | . 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 4130 ℝcr 8179 0cc0 8180 < clt 8361 ℝ+crp 10065 |
| 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 4131 df-rp 10066 |
| This theorem is used by: elrpii 10068 nnrp 10075 rpgt0 10077 rpregt0 10079 ralrp 10087 rexrp 10088 rpaddcl 10089 rpmulcl 10090 rpdivcl 10091 rpgecl 10094 rphalflt 10095 ge0p1rp 10097 rpnegap 10098 negelrp 10099 ltsubrp 10102 ltaddrp 10103 difrp 10104 elrpd 10105 iccdil 10411 icccntr 10413 dfrp2 10709 expgt0 11024 sqrtdiv 11824 mulcn2 12097 ef01bndlem 12542 chtqub 16257 nconstwlpolem 17282 |
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