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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 8333 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 1 | sseli 3238 | 1 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2205 ℝcr 8142 ℝ*cxr 8323 |
| 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 2216 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-v 2817 df-un 3218 df-in 3220 df-ss 3227 df-xr 8328 |
| This theorem is referenced by: rexri 8347 lenlt 8365 ltpnf 10135 mnflt 10138 xrltnsym 10148 xrlttr 10150 xrltso 10151 xrre 10175 xrre3 10177 xltnegi 10190 rexadd 10207 xaddnemnf 10212 xaddnepnf 10213 xaddcom 10216 xnegdi 10223 xpncan 10226 xnpcan 10227 xleadd1a 10228 xleadd1 10230 xltadd1 10231 xltadd2 10232 xsubge0 10236 xposdif 10237 elioo4g 10289 elioc2 10291 elico2 10292 elicc2 10293 iccss 10296 iooshf 10307 iooneg 10343 icoshft 10345 qbtwnxr 10644 modqmuladdim 10756 elicc4abs 11807 icodiamlt 11893 xrmaxrecl 11968 xrmaxaddlem 11973 xrminrecl 11986 bl2in 15397 blssps 15421 blss 15422 reopnap 15540 bl2ioo 15544 blssioo 15547 sincosq2sgn 15821 sincosq3sgn 15822 sincos6thpi 15836 |
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