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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 12505 | . 2 ⊢ (𝐴 ∈ ℕ0 ↔ (𝐴 ∈ ℤ ∧ 0 ≤ 𝐴)) | |
| 2 | 0z 12503 | . . 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 12505 | . . . . . 6 ⊢ (𝑦 ∈ ℕ0 ↔ (𝑦 ∈ ℤ ∧ 0 ≤ 𝑦)) | |
| 10 | nn0ind.6 | . . . . . 6 ⊢ (𝑦 ∈ ℕ0 → (𝜒 → 𝜃)) | |
| 11 | 9, 10 | sylbir 235 | . . . . 5 ⊢ ((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) → (𝜒 → 𝜃)) |
| 12 | 11 | 3adant1 1131 | . . . 4 ⊢ ((0 ∈ ℤ ∧ 𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) → (𝜒 → 𝜃)) |
| 13 | 3, 4, 5, 6, 8, 12 | uzind 12588 | . . 3 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → 𝜏) |
| 14 | 2, 13 | mp3an1 1451 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → 𝜏) |
| 15 | 1, 14 | sylbi 217 | 1 ⊢ (𝐴 ∈ ℕ0 → 𝜏) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5099 (class class class)co 7360 0cc0 11030 1c1 11031 + caddc 11033 ≤ cle 11171 ℕ0cn0 12405 ℤcz 12492 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-nn 12150 df-n0 12406 df-z 12493 |
| This theorem is referenced by: nn0indALT 12592 nn0indd 12593 zindd 12597 fzennn 13895 mulexp 14028 expadd 14031 expmul 14034 leexp1a 14102 bernneq 14156 modexp 14165 faccl 14210 facdiv 14214 facwordi 14216 faclbnd 14217 facubnd 14227 bccl 14249 brfi1indALT 14437 wrdind 14649 wrd2ind 14650 cshweqrep 14748 rtrclreclem4 14988 relexpindlem 14990 iseraltlem2 15610 binom 15757 climcndslem1 15776 binomfallfac 15968 demoivreALT 16130 ruclem8 16166 odd2np1lem 16271 bitsinv1 16373 sadcadd 16389 sadadd2 16391 saddisjlem 16395 smu01lem 16416 smumullem 16423 alginv 16506 prmfac1 16651 pcfac 16831 ramcl 16961 mhmmulg 19049 psgnunilem3 19429 sylow1lem1 19531 efgsrel 19667 efgsfo 19672 efgred 19681 srgmulgass 20156 srgpcomp 20157 srgbinom 20170 lmodvsmmulgdi 20852 cnfldexp 21363 assamulgscm 21861 mplcoe3 21997 expcn 24823 expcnOLD 24825 dvnadd 25891 dvnres 25893 dvnfre 25916 ply1divex 26102 fta1g 26135 plyco 26206 dgrco 26241 dvnply2 26255 plydivex 26265 fta1 26276 cxpmul2 26658 facgam 27036 dchrisumlem1 27460 qabvle 27596 qabvexp 27597 ostth2lem2 27605 rusgrnumwwlk 30034 eupth2 30297 ex-ind-dvds 30519 wrdt2ind 33016 subfacval2 35362 cvmliftlem7 35466 bccolsum 35914 faclim 35921 faclim2 35923 heiborlem4 37986 sumcubes 42604 mzpexpmpt 43023 pell14qrexpclnn0 43144 rmxypos 43225 jm2.17a 43238 jm2.17b 43239 rmygeid 43242 jm2.19lem3 43269 hbtlem5 43406 cnsrexpcl 43443 relexpiidm 43981 fperiodmullem 45587 stoweidlem17 46297 stoweidlem19 46299 wallispilem3 46347 fmtnorec2 47825 lmodvsmdi 48661 itcovalt2 48959 ackendofnn0 48966 |
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