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Mirrors > Home > ILE Home > Th. List > ge0nemnf | Unicode version |
Description: A nonnegative extended real is greater than negative infinity. (Contributed by Mario Carneiro, 20-Aug-2015.) |
Ref | Expression |
---|---|
ge0nemnf |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ge0gtmnf 9773 | . 2 | |
2 | ngtmnft 9767 | . . . . 5 | |
3 | 2 | adantr 274 | . . . 4 |
4 | 3 | biimpd 143 | . . 3 |
5 | 4 | necon2ad 2397 | . 2 |
6 | 1, 5 | mpd 13 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 103 wb 104 wceq 1348 wcel 2141 wne 2340 class class class wbr 3987 cc0 7767 cmnf 7945 cxr 7946 clt 7947 cle 7948 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-sep 4105 ax-pow 4158 ax-pr 4192 ax-un 4416 ax-setind 4519 ax-cnex 7858 ax-resscn 7859 ax-1re 7861 ax-addrcl 7864 ax-rnegex 7876 ax-pre-ltirr 7879 ax-pre-ltwlin 7880 ax-pre-lttrn 7881 |
This theorem depends on definitions: df-bi 116 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-rab 2457 df-v 2732 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3566 df-sn 3587 df-pr 3588 df-op 3590 df-uni 3795 df-br 3988 df-opab 4049 df-po 4279 df-iso 4280 df-xp 4615 df-cnv 4617 df-pnf 7949 df-mnf 7950 df-xr 7951 df-ltxr 7952 df-le 7953 |
This theorem is referenced by: xlesubadd 9833 xrbdtri 11232 isxmet2d 13107 xmetrtri 13135 xblpnfps 13157 xblpnf 13158 xblss2ps 13163 xblss2 13164 |
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