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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 8375 |
. 2
| |
| 2 | 0re 8332 |
. 2
| |
| 3 | 1, 2 | sselii 3245 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| 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 ax-1re 8279 ax-addrcl 8282 ax-rnegex 8294 |
| 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-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-xr 8370 |
| This theorem is used by: 0lepnf 10208 ge0gtmnf 10241 xlt0neg1 10256 xlt0neg2 10257 xle0neg1 10258 xle0neg2 10259 xaddf 10262 xaddval 10263 xaddid1 10280 xaddid2 10281 xnn0xadd0 10285 xaddge0 10296 xsubge0 10299 xposdif 10300 ioopos 10368 elxrge0 10396 0e0iccpnf 10398 dfrp2 10714 xrmaxadd 12051 xrminrpcl 12064 xrbdtri 12066 fprodge0 12428 ef01bndlem 12547 sin01bnd 12548 cos01bnd 12549 cos1bnd 12550 sinltxirr 12552 sin01gt0 12553 cos01gt0 12554 sin02gt0 12555 sincos1sgn 12556 sincos2sgn 12557 cos12dec 12559 halfleoddlt 12685 psmetge0 15574 isxmet2d 15591 xmetge0 15608 blgt0 15645 xblss2ps 15647 xblss2 15648 xblm 15660 bdxmet 15744 bdmet 15745 bdmopn 15747 xmetxp 15750 cnblcld 15778 blssioo 15796 reeff1oleme 16015 reeff1o 16016 sin0pilem1 16025 sin0pilem2 16026 pilem3 16027 sinhalfpilem 16035 sincosq1lem 16069 sincosq1sgn 16070 sincosq2sgn 16071 sinq12gt0 16074 cosq14gt0 16076 tangtx 16082 sincos4thpi 16084 pigt3 16088 cosordlem 16094 cosq34lt1 16095 cos02pilt1 16096 cos0pilt1 16097 repiecelem 17297 repiecege0 17299 iooref1o 17306 taupi 17347 |
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