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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 10055 | . 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 8178 0cc0 8179 < clt 8360 ℝ+crp 10054 |
| 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 10055 |
| This theorem is used by: elrpii 10057 nnrp 10064 rpgt0 10066 rpregt0 10068 ralrp 10076 rexrp 10077 rpaddcl 10078 rpmulcl 10079 rpdivcl 10080 rpgecl 10083 rphalflt 10084 ge0p1rp 10086 rpnegap 10087 negelrp 10088 ltsubrp 10091 ltaddrp 10092 difrp 10093 elrpd 10094 iccdil 10400 icccntr 10402 dfrp2 10698 expgt0 11009 sqrtdiv 11808 mulcn2 12078 ef01bndlem 12523 nconstwlpolem 17115 |
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