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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 12512 | . 2 ⊢ (𝐴 ∈ ℕ0 ↔ (𝐴 ∈ ℤ ∧ 0 ≤ 𝐴)) | |
2 | 0z 12510 | . . 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 12512 | . . . . . 6 ⊢ (𝑦 ∈ ℕ0 ↔ (𝑦 ∈ ℤ ∧ 0 ≤ 𝑦)) | |
10 | nn0ind.6 | . . . . . 6 ⊢ (𝑦 ∈ ℕ0 → (𝜒 → 𝜃)) | |
11 | 9, 10 | sylbir 234 | . . . . 5 ⊢ ((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) → (𝜒 → 𝜃)) |
12 | 11 | 3adant1 1130 | . . . 4 ⊢ ((0 ∈ ℤ ∧ 𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) → (𝜒 → 𝜃)) |
13 | 3, 4, 5, 6, 8, 12 | uzind 12595 | . . 3 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → 𝜏) |
14 | 2, 13 | mp3an1 1448 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → 𝜏) |
15 | 1, 14 | sylbi 216 | 1 ⊢ (𝐴 ∈ ℕ0 → 𝜏) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 class class class wbr 5105 (class class class)co 7357 0cc0 11051 1c1 11052 + caddc 11054 ≤ cle 11190 ℕ0cn0 12413 ℤcz 12499 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2707 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7672 ax-resscn 11108 ax-1cn 11109 ax-icn 11110 ax-addcl 11111 ax-addrcl 11112 ax-mulcl 11113 ax-mulrcl 11114 ax-mulcom 11115 ax-addass 11116 ax-mulass 11117 ax-distr 11118 ax-i2m1 11119 ax-1ne0 11120 ax-1rid 11121 ax-rnegex 11122 ax-rrecex 11123 ax-cnre 11124 ax-pre-lttri 11125 ax-pre-lttrn 11126 ax-pre-ltadd 11127 ax-pre-mulgt0 11128 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3065 df-rex 3074 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-pss 3929 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-op 4593 df-uni 4866 df-iun 4956 df-br 5106 df-opab 5168 df-mpt 5189 df-tr 5223 df-id 5531 df-eprel 5537 df-po 5545 df-so 5546 df-fr 5588 df-we 5590 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-pred 6253 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-riota 7313 df-ov 7360 df-oprab 7361 df-mpo 7362 df-om 7803 df-2nd 7922 df-frecs 8212 df-wrecs 8243 df-recs 8317 df-rdg 8356 df-er 8648 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11191 df-mnf 11192 df-xr 11193 df-ltxr 11194 df-le 11195 df-sub 11387 df-neg 11388 df-nn 12154 df-n0 12414 df-z 12500 |
This theorem is referenced by: nn0indALT 12599 nn0indd 12600 zindd 12604 fzennn 13873 mulexp 14007 expadd 14010 expmul 14013 leexp1a 14080 bernneq 14132 modexp 14141 faccl 14183 facdiv 14187 facwordi 14189 faclbnd 14190 facubnd 14200 bccl 14222 brfi1indALT 14399 wrdind 14610 wrd2ind 14611 cshweqrep 14709 rtrclreclem4 14946 relexpindlem 14948 iseraltlem2 15567 binom 15715 climcndslem1 15734 binomfallfac 15924 demoivreALT 16083 ruclem8 16119 odd2np1lem 16222 bitsinv1 16322 sadcadd 16338 sadadd2 16340 saddisjlem 16344 smu01lem 16365 smumullem 16372 alginv 16451 prmfac1 16597 pcfac 16771 ramcl 16901 mhmmulg 18917 psgnunilem3 19278 sylow1lem1 19380 efgsrel 19516 efgsfo 19521 efgred 19530 srgmulgass 19948 srgpcomp 19949 srgbinom 19962 lmodvsmmulgdi 20357 cnfldexp 20830 assamulgscm 21304 mplcoe3 21439 expcn 24235 dvnadd 25293 dvnres 25295 dvnfre 25316 ply1divex 25501 fta1g 25532 plyco 25602 dgrco 25636 dvnply2 25647 plydivex 25657 fta1 25668 cxpmul2 26044 facgam 26415 dchrisumlem1 26837 qabvle 26973 qabvexp 26974 ostth2lem2 26982 rusgrnumwwlk 28920 eupth2 29183 ex-ind-dvds 29405 wrdt2ind 31807 subfacval2 33781 cvmliftlem7 33885 bccolsum 34312 faclim 34319 faclim2 34321 heiborlem4 36273 mzpexpmpt 41054 pell14qrexpclnn0 41175 rmxypos 41257 jm2.17a 41270 jm2.17b 41271 rmygeid 41274 jm2.19lem3 41301 hbtlem5 41441 cnsrexpcl 41478 relexpiidm 41966 fperiodmullem 43527 stoweidlem17 44248 stoweidlem19 44250 wallispilem3 44298 fmtnorec2 45725 lmodvsmdi 46448 itcovalt2 46753 ackendofnn0 46760 |
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