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Mirrors > Home > ILE Home > Th. List > 1lt2pi | Unicode version |
Description: One is less than two (one plus one). (Contributed by NM, 13-Mar-1996.) |
Ref | Expression |
---|---|
1lt2pi |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1onn 6384 | . . . . 5 | |
2 | nna0 6338 | . . . . 5 | |
3 | 1, 2 | ax-mp 5 | . . . 4 |
4 | 0lt1o 6305 | . . . . 5 | |
5 | peano1 4478 | . . . . . 6 | |
6 | nnaord 6373 | . . . . . 6 | |
7 | 5, 1, 1, 6 | mp3an 1300 | . . . . 5 |
8 | 4, 7 | mpbi 144 | . . . 4 |
9 | 3, 8 | eqeltrri 2191 | . . 3 |
10 | 1pi 7091 | . . . 4 | |
11 | addpiord 7092 | . . . 4 | |
12 | 10, 10, 11 | mp2an 422 | . . 3 |
13 | 9, 12 | eleqtrri 2193 | . 2 |
14 | addclpi 7103 | . . . 4 | |
15 | 10, 10, 14 | mp2an 422 | . . 3 |
16 | ltpiord 7095 | . . 3 | |
17 | 10, 15, 16 | mp2an 422 | . 2 |
18 | 13, 17 | mpbir 145 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 wceq 1316 wcel 1465 c0 3333 class class class wbr 3899 com 4474 (class class class)co 5742 c1o 6274 coa 6278 cnpi 7048 cpli 7049 clti 7051 |
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 588 ax-in2 589 ax-io 683 ax-5 1408 ax-7 1409 ax-gen 1410 ax-ie1 1454 ax-ie2 1455 ax-8 1467 ax-10 1468 ax-11 1469 ax-i12 1470 ax-bndl 1471 ax-4 1472 ax-13 1476 ax-14 1477 ax-17 1491 ax-i9 1495 ax-ial 1499 ax-i5r 1500 ax-ext 2099 ax-coll 4013 ax-sep 4016 ax-nul 4024 ax-pow 4068 ax-pr 4101 ax-un 4325 ax-setind 4422 ax-iinf 4472 |
This theorem depends on definitions: df-bi 116 df-dc 805 df-3or 948 df-3an 949 df-tru 1319 df-fal 1322 df-nf 1422 df-sb 1721 df-eu 1980 df-mo 1981 df-clab 2104 df-cleq 2110 df-clel 2113 df-nfc 2247 df-ne 2286 df-ral 2398 df-rex 2399 df-reu 2400 df-rab 2402 df-v 2662 df-sbc 2883 df-csb 2976 df-dif 3043 df-un 3045 df-in 3047 df-ss 3054 df-nul 3334 df-pw 3482 df-sn 3503 df-pr 3504 df-op 3506 df-uni 3707 df-int 3742 df-iun 3785 df-br 3900 df-opab 3960 df-mpt 3961 df-tr 3997 df-eprel 4181 df-id 4185 df-iord 4258 df-on 4260 df-suc 4263 df-iom 4475 df-xp 4515 df-rel 4516 df-cnv 4517 df-co 4518 df-dm 4519 df-rn 4520 df-res 4521 df-ima 4522 df-iota 5058 df-fun 5095 df-fn 5096 df-f 5097 df-f1 5098 df-fo 5099 df-f1o 5100 df-fv 5101 df-ov 5745 df-oprab 5746 df-mpo 5747 df-1st 6006 df-2nd 6007 df-recs 6170 df-irdg 6235 df-1o 6281 df-oadd 6285 df-ni 7080 df-pli 7081 df-lti 7083 |
This theorem is referenced by: 1lt2nq 7182 |
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