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| Mirrors > Home > ILE Home > Th. List > uznn0sub | Unicode version | ||
| Description: The nonnegative difference of integers is a nonnegative integer. (Contributed by NM, 4-Sep-2005.) |
| Ref | Expression |
|---|---|
| uznn0sub |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluz2 9943 |
. 2
| |
| 2 | znn0sub 9720 |
. . 3
| |
| 3 | 2 | biimp3a 1386 |
. 2
|
| 4 | 1, 3 | sylbi 121 |
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-in1 623 ax-in2 624 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-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8277 ax-resscn 8278 ax-1cn 8279 ax-1re 8280 ax-icn 8281 ax-addcl 8282 ax-addrcl 8283 ax-mulcl 8284 ax-addcom 8286 ax-addass 8288 ax-distr 8290 ax-i2m1 8291 ax-0lt1 8292 ax-0id 8294 ax-rnegex 8295 ax-cnre 8297 ax-pre-ltirr 8298 ax-pre-ltwlin 8299 ax-pre-lttrn 8300 ax-pre-ltadd 8302 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4132 df-opab 4194 df-mpt 4195 df-id 4440 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 df-iota 5340 df-fun 5382 df-fn 5383 df-f 5384 df-fv 5388 df-riota 6041 df-ov 6091 df-oprab 6092 df-mpo 6093 df-pnf 8369 df-mnf 8370 df-xr 8371 df-ltxr 8372 df-le 8373 df-sub 8507 df-neg 8508 df-inn 9315 df-n0 9576 df-z 9655 df-uz 9938 |
| This theorem is used by: fznn0sub 10480 elfzmlbm 10555 frecfzen2 10885 fzfig 10888 leexp2a 11050 hashfz 11284 ccatrn 11399 cvgratnnlemnexp 12316 cvgratnnlemmn 12317 dvdsexp 12653 prmm2nn0 12937 hashdvds 13028 prmdiv 13042 prmdiveq 13043 pcaddlem 13147 gzsumconst 14233 lgsquadlem1 16434 clwwlknonex2lem1 16916 clwwlknonex2lem2 16917 |
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