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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 8317 |
. 2
| |
| 2 | 0re 8274 |
. 2
| |
| 3 | 1, 2 | sselii 3235 |
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 2214 ax-1re 8221 ax-addrcl 8224 ax-rnegex 8236 |
| 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-ral 2525 df-rex 2526 df-v 2815 df-un 3215 df-in 3217 df-ss 3224 df-xr 8312 |
| This theorem is referenced by: 0lepnf 10123 ge0gtmnf 10156 xlt0neg1 10171 xlt0neg2 10172 xle0neg1 10173 xle0neg2 10174 xaddf 10177 xaddval 10178 xaddid1 10195 xaddid2 10196 xnn0xadd0 10200 xaddge0 10211 xsubge0 10214 xposdif 10215 ioopos 10283 elxrge0 10311 0e0iccpnf 10313 dfrp2 10623 xrmaxadd 11946 xrminrpcl 11959 xrbdtri 11961 fprodge0 12323 ef01bndlem 12442 sin01bnd 12443 cos01bnd 12444 cos1bnd 12445 sinltxirr 12447 sin01gt0 12448 cos01gt0 12449 sin02gt0 12450 sincos1sgn 12451 sincos2sgn 12452 cos12dec 12454 halfleoddlt 12580 psmetge0 15196 isxmet2d 15213 xmetge0 15230 blgt0 15267 xblss2ps 15269 xblss2 15270 xblm 15282 bdxmet 15366 bdmet 15367 bdmopn 15369 xmetxp 15372 cnblcld 15400 blssioo 15418 reeff1oleme 15637 reeff1o 15638 sin0pilem1 15646 sin0pilem2 15647 pilem3 15648 sinhalfpilem 15656 sincosq1lem 15690 sincosq1sgn 15691 sincosq2sgn 15692 sinq12gt0 15695 cosq14gt0 15697 tangtx 15703 sincos4thpi 15705 pigt3 15709 cosordlem 15714 cosq34lt1 15715 cos02pilt1 15716 cos0pilt1 15717 repiecelem 16809 repiecege0 16811 iooref1o 16818 taupi 16859 |
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