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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 10066 | . . 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 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-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 10066 |
| This theorem is used by: rpxr 10073 rpcn 10074 rpssre 10076 rpge0 10078 rprege0 10080 rpap0 10082 rprene0 10083 rpreap0 10084 rpaddcl 10089 rpmulcl 10090 rpdivcl 10091 rpgecl 10094 ledivge1le 10138 addlelt 10180 iccdil 10411 expnlbnd 11117 caucvgre 11763 rennim 11784 rpsqrtcl 11823 qdenre 11985 rpmaxcl 12006 rpmincl 12022 xrminrpcl 12059 2clim 12086 cn1lem 12099 climsqz 12120 climsqz2 12121 climcau 12132 efgt1 12483 ef01bndlem 12542 sinltxirr 12547 bdmet 15694 bdmopn 15696 dveflem 15918 reeff1o 15965 logleb 16069 logrpap0b 16070 cxple3 16118 rpcxpsqrt 16119 rpcxpsqrtth 16127 chtqrpcl 16240 bposlem7 16278 bposlem8 16279 bposlem9 16280 dceqnconst 17277 dcapnconst 17278 |
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