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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 8201 |
. 2
| |
| 2 | 0re 8157 |
. 2
| |
| 3 | 1, 2 | sselii 3221 |
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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-1re 8104 ax-addrcl 8107 ax-rnegex 8119 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-xr 8196 |
| This theorem is referenced by: 0lepnf 9998 ge0gtmnf 10031 xlt0neg1 10046 xlt0neg2 10047 xle0neg1 10048 xle0neg2 10049 xaddf 10052 xaddval 10053 xaddid1 10070 xaddid2 10071 xnn0xadd0 10075 xaddge0 10086 xsubge0 10089 xposdif 10090 ioopos 10158 elxrge0 10186 0e0iccpnf 10188 dfrp2 10495 xrmaxadd 11787 xrminrpcl 11800 xrbdtri 11802 fprodge0 12163 ef01bndlem 12282 sin01bnd 12283 cos01bnd 12284 cos1bnd 12285 sinltxirr 12287 sin01gt0 12288 cos01gt0 12289 sin02gt0 12290 sincos1sgn 12291 sincos2sgn 12292 cos12dec 12294 halfleoddlt 12420 psmetge0 15020 isxmet2d 15037 xmetge0 15054 blgt0 15091 xblss2ps 15093 xblss2 15094 xblm 15106 bdxmet 15190 bdmet 15191 bdmopn 15193 xmetxp 15196 cnblcld 15224 blssioo 15242 reeff1oleme 15461 reeff1o 15462 sin0pilem1 15470 sin0pilem2 15471 pilem3 15472 sinhalfpilem 15480 sincosq1lem 15514 sincosq1sgn 15515 sincosq2sgn 15516 sinq12gt0 15519 cosq14gt0 15521 tangtx 15527 sincos4thpi 15529 pigt3 15533 cosordlem 15538 cosq34lt1 15539 cos02pilt1 15540 cos0pilt1 15541 iooref1o 16462 taupi 16501 |
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