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| Mirrors > Home > ILE Home > Th. List > 0xr | Unicode version | ||
| Description: Zero is an extended real. (Contributed by Mario Carneiro, 15-Jun-2014.) |
| Ref | Expression |
|---|---|
| 0xr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ressxr 8265 |
. 2
| |
| 2 | 0re 8222 |
. 2
| |
| 3 | 1, 2 | sselii 3225 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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 2213 ax-1re 8169 ax-addrcl 8172 ax-rnegex 8184 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-xr 8260 |
| This theorem is referenced by: 0lepnf 10069 ge0gtmnf 10102 xlt0neg1 10117 xlt0neg2 10118 xle0neg1 10119 xle0neg2 10120 xaddf 10123 xaddval 10124 xaddid1 10141 xaddid2 10142 xnn0xadd0 10146 xaddge0 10157 xsubge0 10160 xposdif 10161 ioopos 10229 elxrge0 10257 0e0iccpnf 10259 dfrp2 10569 xrmaxadd 11884 xrminrpcl 11897 xrbdtri 11899 fprodge0 12261 ef01bndlem 12380 sin01bnd 12381 cos01bnd 12382 cos1bnd 12383 sinltxirr 12385 sin01gt0 12386 cos01gt0 12387 sin02gt0 12388 sincos1sgn 12389 sincos2sgn 12390 cos12dec 12392 halfleoddlt 12518 psmetge0 15125 isxmet2d 15142 xmetge0 15159 blgt0 15196 xblss2ps 15198 xblss2 15199 xblm 15211 bdxmet 15295 bdmet 15296 bdmopn 15298 xmetxp 15301 cnblcld 15329 blssioo 15347 reeff1oleme 15566 reeff1o 15567 sin0pilem1 15575 sin0pilem2 15576 pilem3 15577 sinhalfpilem 15585 sincosq1lem 15619 sincosq1sgn 15620 sincosq2sgn 15621 sinq12gt0 15624 cosq14gt0 15626 tangtx 15632 sincos4thpi 15634 pigt3 15638 cosordlem 15643 cosq34lt1 15644 cos02pilt1 15645 cos0pilt1 15646 repiecelem 16740 repiecege0 16742 iooref1o 16749 taupi 16789 |
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