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| Mirrors > Home > ILE Home > Th. List > rpre | GIF version | ||
| Description: A positive real is a real. (Contributed by NM, 27-Oct-2007.) |
| Ref | Expression |
|---|---|
| rpre | ⊢ (𝐴 ∈ ℝ+ → 𝐴 ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-rp 10072 | . . 3 ⊢ ℝ+ = {𝑥 ∈ ℝ ∣ 0 < 𝑥} | |
| 2 | ssrab2 3333 | . . 3 ⊢ {𝑥 ∈ ℝ ∣ 0 < 𝑥} ⊆ ℝ | |
| 3 | 1, 2 | eqsstri 3280 | . 2 ⊢ ℝ+ ⊆ ℝ |
| 4 | 3 | sseli 3244 | 1 ⊢ (𝐴 ∈ ℝ+ → 𝐴 ∈ ℝ) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 {crab 2532 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-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rab 2537 df-in 3226 df-ss 3233 df-rp 10072 |
| This theorem is used by: rpxr 10079 rpcn 10080 rpssre 10082 rpge0 10084 rprege0 10086 rpap0 10088 rprene0 10089 rpreap0 10090 rpaddcl 10095 rpmulcl 10096 rpdivcl 10097 rpgecl 10100 ledivge1le 10144 addlelt 10186 iccdil 10417 expnlbnd 11123 caucvgre 11769 rennim 11790 rpsqrtcl 11829 qdenre 11991 rpmaxcl 12012 rpmincl 12028 xrminrpcl 12065 2clim 12092 cn1lem 12105 climsqz 12126 climsqz2 12127 climcau 12138 efgt1 12489 ef01bndlem 12548 sinltxirr 12553 bdmet 15728 bdmopn 15730 dveflem 15952 reeff1o 15999 logleb 16105 logrpap0b 16106 cxple3 16156 rpcxpsqrt 16157 rpcxpsqrtth 16165 chtqrpcl 16279 bposlem7 16317 bposlem8 16318 bposlem9 16319 dceqnconst 17317 dcapnconst 17318 |
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