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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 8376 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 1 | sseli 3244 | 1 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 ℝcr 8185 ℝ*cxr 8366 |
| 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-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-xr 8371 |
| This theorem is used by: rexri 8390 lenlt 8408 ltpnf 10200 mnflt 10203 xrltnsym 10213 xrlttr 10215 xrltso 10216 xrre 10240 xrre3 10242 xltnegi 10255 rexadd 10272 xaddnemnf 10277 xaddnepnf 10278 xaddcom 10281 xnegdi 10288 xpncan 10291 xnpcan 10292 xleadd1a 10293 xleadd1 10295 xltadd1 10296 xltadd2 10297 xsubge0 10301 xposdif 10302 elioo4g 10354 elioc2 10356 elico2 10357 elicc2 10358 iccss 10361 iooshf 10372 iooneg 10408 icoshft 10410 qbtwnxr 10710 modqmuladdim 10826 elicc4abs 11884 icodiamlt 11970 xrmaxrecl 12047 xrmaxaddlem 12052 xrminrecl 12065 bl2in 15641 blssps 15665 blss 15666 reopnap 15784 bl2ioo 15788 blssioo 15791 sincosq2sgn 16066 sincosq3sgn 16067 sincos6thpi 16081 |
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