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Mirrors > Home > ILE Home > Th. List > lesub0i | Unicode version |
Description: Lemma to show a nonnegative number is zero. (Contributed by NM, 8-Oct-1999.) (Proof shortened by Andrew Salmon, 19-Nov-2011.) |
Ref | Expression |
---|---|
lt2.1 | |
lt2.2 |
Ref | Expression |
---|---|
lesub0i |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lt2.1 | . 2 | |
2 | lt2.2 | . 2 | |
3 | lesub0 8403 | . 2 | |
4 | 1, 2, 3 | mp2an 425 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 103 wb 104 wceq 1350 wcel 2143 class class class wbr 3991 (class class class)co 5858 cr 7778 cc0 7779 cle 7960 cmin 8095 |
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 611 ax-in2 612 ax-io 706 ax-5 1442 ax-7 1443 ax-gen 1444 ax-ie1 1488 ax-ie2 1489 ax-8 1499 ax-10 1500 ax-11 1501 ax-i12 1502 ax-bndl 1504 ax-4 1505 ax-17 1521 ax-i9 1525 ax-ial 1529 ax-i5r 1530 ax-13 2145 ax-14 2146 ax-ext 2154 ax-sep 4109 ax-pow 4162 ax-pr 4196 ax-un 4420 ax-setind 4523 ax-cnex 7870 ax-resscn 7871 ax-1cn 7872 ax-1re 7873 ax-icn 7874 ax-addcl 7875 ax-addrcl 7876 ax-mulcl 7877 ax-addcom 7879 ax-addass 7881 ax-distr 7883 ax-i2m1 7884 ax-0id 7887 ax-rnegex 7888 ax-cnre 7890 ax-pre-ltirr 7891 ax-pre-apti 7894 ax-pre-ltadd 7895 |
This theorem depends on definitions: df-bi 116 df-3an 977 df-tru 1353 df-fal 1356 df-nf 1456 df-sb 1758 df-eu 2024 df-mo 2025 df-clab 2159 df-cleq 2165 df-clel 2168 df-nfc 2303 df-ne 2343 df-nel 2438 df-ral 2455 df-rex 2456 df-reu 2457 df-rab 2459 df-v 2734 df-sbc 2958 df-dif 3125 df-un 3127 df-in 3129 df-ss 3136 df-pw 3570 df-sn 3591 df-pr 3592 df-op 3594 df-uni 3799 df-br 3992 df-opab 4053 df-id 4280 df-xp 4619 df-rel 4620 df-cnv 4621 df-co 4622 df-dm 4623 df-iota 5163 df-fun 5203 df-fv 5209 df-riota 5814 df-ov 5861 df-oprab 5862 df-mpo 5863 df-pnf 7961 df-mnf 7962 df-xr 7963 df-ltxr 7964 df-le 7965 df-sub 8097 df-neg 8098 |
This theorem is referenced by: (None) |
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