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Mirrors > Home > MPE Home > Th. List > nn0ind | Structured version Visualization version GIF version |
Description: Principle of Mathematical Induction (inference schema) on nonnegative integers. The first four hypotheses give us the substitution instances we need; the last two are the basis and the induction step. (Contributed by NM, 13-May-2004.) |
Ref | Expression |
---|---|
nn0ind.1 | ⊢ (𝑥 = 0 → (𝜑 ↔ 𝜓)) |
nn0ind.2 | ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜒)) |
nn0ind.3 | ⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜃)) |
nn0ind.4 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏)) |
nn0ind.5 | ⊢ 𝜓 |
nn0ind.6 | ⊢ (𝑦 ∈ ℕ0 → (𝜒 → 𝜃)) |
Ref | Expression |
---|---|
nn0ind | ⊢ (𝐴 ∈ ℕ0 → 𝜏) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elnn0z 11574 | . 2 ⊢ (𝐴 ∈ ℕ0 ↔ (𝐴 ∈ ℤ ∧ 0 ≤ 𝐴)) | |
2 | 0z 11572 | . . 3 ⊢ 0 ∈ ℤ | |
3 | nn0ind.1 | . . . 4 ⊢ (𝑥 = 0 → (𝜑 ↔ 𝜓)) | |
4 | nn0ind.2 | . . . 4 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜒)) | |
5 | nn0ind.3 | . . . 4 ⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜃)) | |
6 | nn0ind.4 | . . . 4 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏)) | |
7 | nn0ind.5 | . . . . 5 ⊢ 𝜓 | |
8 | 7 | a1i 11 | . . . 4 ⊢ (0 ∈ ℤ → 𝜓) |
9 | elnn0z 11574 | . . . . . 6 ⊢ (𝑦 ∈ ℕ0 ↔ (𝑦 ∈ ℤ ∧ 0 ≤ 𝑦)) | |
10 | nn0ind.6 | . . . . . 6 ⊢ (𝑦 ∈ ℕ0 → (𝜒 → 𝜃)) | |
11 | 9, 10 | sylbir 225 | . . . . 5 ⊢ ((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) → (𝜒 → 𝜃)) |
12 | 11 | 3adant1 1124 | . . . 4 ⊢ ((0 ∈ ℤ ∧ 𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) → (𝜒 → 𝜃)) |
13 | 3, 4, 5, 6, 8, 12 | uzind 11653 | . . 3 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → 𝜏) |
14 | 2, 13 | mp3an1 1552 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → 𝜏) |
15 | 1, 14 | sylbi 207 | 1 ⊢ (𝐴 ∈ ℕ0 → 𝜏) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 383 = wceq 1624 ∈ wcel 2131 class class class wbr 4796 (class class class)co 6805 0cc0 10120 1c1 10121 + caddc 10123 ≤ cle 10259 ℕ0cn0 11476 ℤcz 11561 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1863 ax-4 1878 ax-5 1980 ax-6 2046 ax-7 2082 ax-8 2133 ax-9 2140 ax-10 2160 ax-11 2175 ax-12 2188 ax-13 2383 ax-ext 2732 ax-sep 4925 ax-nul 4933 ax-pow 4984 ax-pr 5047 ax-un 7106 ax-resscn 10177 ax-1cn 10178 ax-icn 10179 ax-addcl 10180 ax-addrcl 10181 ax-mulcl 10182 ax-mulrcl 10183 ax-mulcom 10184 ax-addass 10185 ax-mulass 10186 ax-distr 10187 ax-i2m1 10188 ax-1ne0 10189 ax-1rid 10190 ax-rnegex 10191 ax-rrecex 10192 ax-cnre 10193 ax-pre-lttri 10194 ax-pre-lttrn 10195 ax-pre-ltadd 10196 ax-pre-mulgt0 10197 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1073 df-3an 1074 df-tru 1627 df-ex 1846 df-nf 1851 df-sb 2039 df-eu 2603 df-mo 2604 df-clab 2739 df-cleq 2745 df-clel 2748 df-nfc 2883 df-ne 2925 df-nel 3028 df-ral 3047 df-rex 3048 df-reu 3049 df-rab 3051 df-v 3334 df-sbc 3569 df-csb 3667 df-dif 3710 df-un 3712 df-in 3714 df-ss 3721 df-pss 3723 df-nul 4051 df-if 4223 df-pw 4296 df-sn 4314 df-pr 4316 df-tp 4318 df-op 4320 df-uni 4581 df-iun 4666 df-br 4797 df-opab 4857 df-mpt 4874 df-tr 4897 df-id 5166 df-eprel 5171 df-po 5179 df-so 5180 df-fr 5217 df-we 5219 df-xp 5264 df-rel 5265 df-cnv 5266 df-co 5267 df-dm 5268 df-rn 5269 df-res 5270 df-ima 5271 df-pred 5833 df-ord 5879 df-on 5880 df-lim 5881 df-suc 5882 df-iota 6004 df-fun 6043 df-fn 6044 df-f 6045 df-f1 6046 df-fo 6047 df-f1o 6048 df-fv 6049 df-riota 6766 df-ov 6808 df-oprab 6809 df-mpt2 6810 df-om 7223 df-wrecs 7568 df-recs 7629 df-rdg 7667 df-er 7903 df-en 8114 df-dom 8115 df-sdom 8116 df-pnf 10260 df-mnf 10261 df-xr 10262 df-ltxr 10263 df-le 10264 df-sub 10452 df-neg 10453 df-nn 11205 df-n0 11477 df-z 11562 |
This theorem is referenced by: nn0indALT 11657 nn0indd 11658 zindd 11662 fzennn 12953 mulexp 13085 expadd 13088 expmul 13091 leexp1a 13105 bernneq 13176 modexp 13185 faccl 13256 facdiv 13260 facwordi 13262 faclbnd 13263 faclbnd6 13272 facubnd 13273 bccl 13295 brfi1indALT 13466 wrdind 13668 wrd2ind 13669 cshweqrep 13759 rtrclreclem4 13992 relexpindlem 13994 cjexp 14081 absexp 14235 iseraltlem2 14604 binom 14753 bcxmas 14758 climcndslem1 14772 binomfallfac 14963 demoivreALT 15122 ruclem8 15157 odd2np1lem 15258 bitsinv1 15358 sadcadd 15374 sadadd2 15376 saddisjlem 15380 smu01lem 15401 smumullem 15408 alginv 15482 prmfac1 15625 pcfac 15797 ramcl 15927 mhmmulg 17776 psgnunilem3 18108 sylow1lem1 18205 efgsrel 18339 efgsfo 18344 efgred 18353 srgmulgass 18723 srgpcomp 18724 srgbinom 18737 lmodvsmmulgdi 19092 assamulgscm 19544 mplcoe3 19660 cnfldexp 19973 tmdmulg 22089 expcn 22868 dvnadd 23883 dvnres 23885 dvnfre 23906 ply1divex 24087 fta1g 24118 plyco 24188 dgrco 24222 dvnply2 24233 plydivex 24243 fta1 24254 cxpmul2 24626 facgam 24983 dchrisumlem1 25369 qabvle 25505 qabvexp 25506 ostth2lem2 25514 rusgrnumwwlk 27089 eupth2 27383 ex-ind-dvds 27621 subfacval2 31468 cvmliftlem7 31572 bccolsum 31924 faclim 31931 faclim2 31933 heiborlem4 33918 mzpexpmpt 37802 pell14qrexpclnn0 37924 rmxypos 38008 jm2.17a 38021 jm2.17b 38022 rmygeid 38025 jm2.19lem3 38052 hbtlem5 38192 cnsrexpcl 38229 relexpiidm 38490 fperiodmullem 40008 stoweidlem17 40729 stoweidlem19 40731 wallispilem3 40779 fmtnorec2 41957 lmodvsmdi 42665 |
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