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Mirrors > Home > ILE Home > Th. List > nnm1nn0 | Unicode version |
Description: A positive integer minus 1 is a nonnegative integer. (Contributed by Jason Orendorff, 24-Jan-2007.) (Revised by Mario Carneiro, 16-May-2014.) |
Ref | Expression |
---|---|
nnm1nn0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nn1m1nn 8057 | . . . 4 | |
2 | oveq1 5539 | . . . . . 6 | |
3 | 1m1e0 8108 | . . . . . 6 | |
4 | 2, 3 | syl6eq 2129 | . . . . 5 |
5 | 4 | orim1i 709 | . . . 4 |
6 | 1, 5 | syl 14 | . . 3 |
7 | 6 | orcomd 680 | . 2 |
8 | elnn0 8290 | . 2 | |
9 | 7, 8 | sylibr 132 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wo 661 wceq 1284 wcel 1433 (class class class)co 5532 cc0 6981 c1 6982 cmin 7279 cn 8039 cn0 8288 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-in1 576 ax-in2 577 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 ax-setind 4280 ax-cnex 7067 ax-resscn 7068 ax-1cn 7069 ax-1re 7070 ax-icn 7071 ax-addcl 7072 ax-addrcl 7073 ax-mulcl 7074 ax-addcom 7076 ax-addass 7078 ax-distr 7080 ax-i2m1 7081 ax-0id 7084 ax-rnegex 7085 ax-cnre 7087 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-fal 1290 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ne 2246 df-ral 2353 df-rex 2354 df-reu 2355 df-rab 2357 df-v 2603 df-sbc 2816 df-dif 2975 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-uni 3602 df-int 3637 df-br 3786 df-opab 3840 df-id 4048 df-xp 4369 df-rel 4370 df-cnv 4371 df-co 4372 df-dm 4373 df-iota 4887 df-fun 4924 df-fv 4930 df-riota 5488 df-ov 5535 df-oprab 5536 df-mpt2 5537 df-sub 7281 df-inn 8040 df-n0 8289 |
This theorem is referenced by: elnn0nn 8330 nnaddm1cl 8412 nn0n0n1ge2 8418 fseq1m1p1 9112 nn0ennn 9425 expm1t 9504 expgt1 9514 bcn1 9685 bcm1k 9687 bcn2m1 9696 resqrexlemnm 9904 resqrexlemcvg 9905 resqrexlemga 9909 iddvdsexp 10219 dvdsfac 10260 oexpneg 10276 |
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