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Mirrors > Home > MPE Home > Th. List > nn0abscl | Structured version Visualization version GIF version |
Description: The absolute value of an integer is a nonnegative integer. (Contributed by NM, 27-Feb-2005.) (Proof shortened by Mario Carneiro, 29-May-2016.) |
Ref | Expression |
---|---|
nn0abscl | ⊢ (𝐴 ∈ ℤ → (abs‘𝐴) ∈ ℕ0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zre 12592 | . . . 4 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ) | |
2 | absz 15290 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 ∈ ℤ ↔ (abs‘𝐴) ∈ ℤ)) | |
3 | 1, 2 | syl 17 | . . 3 ⊢ (𝐴 ∈ ℤ → (𝐴 ∈ ℤ ↔ (abs‘𝐴) ∈ ℤ)) |
4 | 3 | ibi 266 | . 2 ⊢ (𝐴 ∈ ℤ → (abs‘𝐴) ∈ ℤ) |
5 | zcn 12593 | . . 3 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℂ) | |
6 | absge0 15266 | . . 3 ⊢ (𝐴 ∈ ℂ → 0 ≤ (abs‘𝐴)) | |
7 | 5, 6 | syl 17 | . 2 ⊢ (𝐴 ∈ ℤ → 0 ≤ (abs‘𝐴)) |
8 | elnn0z 12601 | . 2 ⊢ ((abs‘𝐴) ∈ ℕ0 ↔ ((abs‘𝐴) ∈ ℤ ∧ 0 ≤ (abs‘𝐴))) | |
9 | 4, 7, 8 | sylanbrc 581 | 1 ⊢ (𝐴 ∈ ℤ → (abs‘𝐴) ∈ ℕ0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∈ wcel 2098 class class class wbr 5143 ‘cfv 6543 ℂcc 11136 ℝcr 11137 0cc0 11138 ≤ cle 11279 ℕ0cn0 12502 ℤcz 12588 abscabs 15213 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-sep 5294 ax-nul 5301 ax-pow 5359 ax-pr 5423 ax-un 7738 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 ax-pre-sup 11216 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3769 df-csb 3885 df-dif 3942 df-un 3944 df-in 3946 df-ss 3956 df-pss 3959 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5227 df-tr 5261 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7372 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7869 df-2nd 7992 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-er 8723 df-en 8963 df-dom 8964 df-sdom 8965 df-sup 9465 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-div 11902 df-nn 12243 df-2 12305 df-3 12306 df-n0 12503 df-z 12589 df-uz 12853 df-rp 13007 df-seq 13999 df-exp 14059 df-cj 15078 df-re 15079 df-im 15080 df-sqrt 15214 df-abs 15215 |
This theorem is referenced by: zabscl 15292 absrdbnd 15320 divalglem0 16369 divalglem2 16371 divalglem5 16373 gcdcllem1 16473 absmulgcd 16524 lcmgcd 16577 lcmgcdeq 16582 mulgcddvds 16625 sqnprm 16672 zgcdsq 16724 4sqlem11 16923 odnncl 19504 gexdvds 19543 prmirredlem 21402 zdis 24750 aannenlem2 26282 efif1olem4 26497 lgsabs1 27287 2sqblem 27382 rplogsumlem2 27436 zexpgcd 41961 dvdsexpb 41967 pellexlem5 42318 jm2.19 42479 etransclem44 45729 etransc 45734 |
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