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| Mirrors > Home > ILE Home > Th. List > rexr | GIF version | ||
| Description: A standard real is an extended real. (Contributed by NM, 14-Oct-2005.) |
| Ref | Expression |
|---|---|
| rexr | ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ressxr 8313 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 1 | sseli 3233 | 1 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2203 ℝcr 8122 ℝ*cxr 8303 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2814 df-un 3214 df-in 3216 df-ss 3223 df-xr 8308 |
| This theorem is referenced by: rexri 8327 lenlt 8345 ltpnf 10109 mnflt 10112 xrltnsym 10122 xrlttr 10124 xrltso 10125 xrre 10149 xrre3 10151 xltnegi 10164 rexadd 10181 xaddnemnf 10186 xaddnepnf 10187 xaddcom 10190 xnegdi 10197 xpncan 10200 xnpcan 10201 xleadd1a 10202 xleadd1 10204 xltadd1 10205 xltadd2 10206 xsubge0 10210 xposdif 10211 elioo4g 10263 elioc2 10265 elico2 10266 elicc2 10267 iccss 10270 iooshf 10281 iooneg 10317 icoshft 10319 qbtwnxr 10613 modqmuladdim 10725 elicc4abs 11772 icodiamlt 11858 xrmaxrecl 11933 xrmaxaddlem 11938 xrminrecl 11951 bl2in 15255 blssps 15279 blss 15280 reopnap 15398 bl2ioo 15402 blssioo 15405 sincosq2sgn 15679 sincosq3sgn 15680 sincos6thpi 15694 |
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