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Theorem fnn0ind 8832
Description: Induction on the integers from 0 to 𝑁 inclusive . The first four hypotheses give us the substitution instances we need; the last two are the basis and the induction step. (Contributed by Paul Chapman, 31-Mar-2011.)
Hypotheses
Ref Expression
fnn0ind.1 (𝑥 = 0 → (𝜑𝜓))
fnn0ind.2 (𝑥 = 𝑦 → (𝜑𝜒))
fnn0ind.3 (𝑥 = (𝑦 + 1) → (𝜑𝜃))
fnn0ind.4 (𝑥 = 𝐾 → (𝜑𝜏))
fnn0ind.5 (𝑁 ∈ ℕ0𝜓)
fnn0ind.6 ((𝑁 ∈ ℕ0𝑦 ∈ ℕ0𝑦 < 𝑁) → (𝜒𝜃))
Assertion
Ref Expression
fnn0ind ((𝑁 ∈ ℕ0𝐾 ∈ ℕ0𝐾𝑁) → 𝜏)
Distinct variable groups:   𝑥,𝐾   𝑥,𝑁,𝑦   𝜒,𝑥   𝜑,𝑦   𝜓,𝑥   𝜏,𝑥   𝜃,𝑥
Allowed substitution hints:   𝜑(𝑥)   𝜓(𝑦)   𝜒(𝑦)   𝜃(𝑦)   𝜏(𝑦)   𝐾(𝑦)

Proof of Theorem fnn0ind
StepHypRef Expression
1 elnn0z 8733 . . . 4 (𝐾 ∈ ℕ0 ↔ (𝐾 ∈ ℤ ∧ 0 ≤ 𝐾))
2 nn0z 8740 . . . . . 6 (𝑁 ∈ ℕ0𝑁 ∈ ℤ)
3 0z 8731 . . . . . . . 8 0 ∈ ℤ
4 fnn0ind.1 . . . . . . . . 9 (𝑥 = 0 → (𝜑𝜓))
5 fnn0ind.2 . . . . . . . . 9 (𝑥 = 𝑦 → (𝜑𝜒))
6 fnn0ind.3 . . . . . . . . 9 (𝑥 = (𝑦 + 1) → (𝜑𝜃))
7 fnn0ind.4 . . . . . . . . 9 (𝑥 = 𝐾 → (𝜑𝜏))
8 elnn0z 8733 . . . . . . . . . . 11 (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℤ ∧ 0 ≤ 𝑁))
9 fnn0ind.5 . . . . . . . . . . 11 (𝑁 ∈ ℕ0𝜓)
108, 9sylbir 133 . . . . . . . . . 10 ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → 𝜓)
11103adant1 961 . . . . . . . . 9 ((0 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → 𝜓)
12 zre 8724 . . . . . . . . . . . . . . . 16 (𝑦 ∈ ℤ → 𝑦 ∈ ℝ)
13 zre 8724 . . . . . . . . . . . . . . . 16 (𝑁 ∈ ℤ → 𝑁 ∈ ℝ)
14 0re 7467 . . . . . . . . . . . . . . . . 17 0 ∈ ℝ
15 lelttr 7552 . . . . . . . . . . . . . . . . . 18 ((0 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((0 ≤ 𝑦𝑦 < 𝑁) → 0 < 𝑁))
16 ltle 7551 . . . . . . . . . . . . . . . . . . 19 ((0 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (0 < 𝑁 → 0 ≤ 𝑁))
17163adant2 962 . . . . . . . . . . . . . . . . . 18 ((0 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (0 < 𝑁 → 0 ≤ 𝑁))
1815, 17syld 44 . . . . . . . . . . . . . . . . 17 ((0 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((0 ≤ 𝑦𝑦 < 𝑁) → 0 ≤ 𝑁))
1914, 18mp3an1 1260 . . . . . . . . . . . . . . . 16 ((𝑦 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((0 ≤ 𝑦𝑦 < 𝑁) → 0 ≤ 𝑁))
2012, 13, 19syl2an 283 . . . . . . . . . . . . . . 15 ((𝑦 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((0 ≤ 𝑦𝑦 < 𝑁) → 0 ≤ 𝑁))
2120ex 113 . . . . . . . . . . . . . 14 (𝑦 ∈ ℤ → (𝑁 ∈ ℤ → ((0 ≤ 𝑦𝑦 < 𝑁) → 0 ≤ 𝑁)))
2221com23 77 . . . . . . . . . . . . 13 (𝑦 ∈ ℤ → ((0 ≤ 𝑦𝑦 < 𝑁) → (𝑁 ∈ ℤ → 0 ≤ 𝑁)))
23223impib 1141 . . . . . . . . . . . 12 ((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦𝑦 < 𝑁) → (𝑁 ∈ ℤ → 0 ≤ 𝑁))
2423impcom 123 . . . . . . . . . . 11 ((𝑁 ∈ ℤ ∧ (𝑦 ∈ ℤ ∧ 0 ≤ 𝑦𝑦 < 𝑁)) → 0 ≤ 𝑁)
25 elnn0z 8733 . . . . . . . . . . . . . . . . 17 (𝑦 ∈ ℕ0 ↔ (𝑦 ∈ ℤ ∧ 0 ≤ 𝑦))
2625anbi1i 446 . . . . . . . . . . . . . . . 16 ((𝑦 ∈ ℕ0𝑦 < 𝑁) ↔ ((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) ∧ 𝑦 < 𝑁))
27 fnn0ind.6 . . . . . . . . . . . . . . . . 17 ((𝑁 ∈ ℕ0𝑦 ∈ ℕ0𝑦 < 𝑁) → (𝜒𝜃))
28273expb 1144 . . . . . . . . . . . . . . . 16 ((𝑁 ∈ ℕ0 ∧ (𝑦 ∈ ℕ0𝑦 < 𝑁)) → (𝜒𝜃))
298, 26, 28syl2anbr 286 . . . . . . . . . . . . . . 15 (((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) ∧ ((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) ∧ 𝑦 < 𝑁)) → (𝜒𝜃))
3029expcom 114 . . . . . . . . . . . . . 14 (((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦) ∧ 𝑦 < 𝑁) → ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (𝜒𝜃)))
31303impa 1138 . . . . . . . . . . . . 13 ((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦𝑦 < 𝑁) → ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (𝜒𝜃)))
3231expd 254 . . . . . . . . . . . 12 ((𝑦 ∈ ℤ ∧ 0 ≤ 𝑦𝑦 < 𝑁) → (𝑁 ∈ ℤ → (0 ≤ 𝑁 → (𝜒𝜃))))
3332impcom 123 . . . . . . . . . . 11 ((𝑁 ∈ ℤ ∧ (𝑦 ∈ ℤ ∧ 0 ≤ 𝑦𝑦 < 𝑁)) → (0 ≤ 𝑁 → (𝜒𝜃)))
3424, 33mpd 13 . . . . . . . . . 10 ((𝑁 ∈ ℤ ∧ (𝑦 ∈ ℤ ∧ 0 ≤ 𝑦𝑦 < 𝑁)) → (𝜒𝜃))
3534adantll 460 . . . . . . . . 9 (((0 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝑦 ∈ ℤ ∧ 0 ≤ 𝑦𝑦 < 𝑁)) → (𝜒𝜃))
364, 5, 6, 7, 11, 35fzind 8831 . . . . . . . 8 (((0 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ 0 ≤ 𝐾𝐾𝑁)) → 𝜏)
373, 36mpanl1 425 . . . . . . 7 ((𝑁 ∈ ℤ ∧ (𝐾 ∈ ℤ ∧ 0 ≤ 𝐾𝐾𝑁)) → 𝜏)
3837expcom 114 . . . . . 6 ((𝐾 ∈ ℤ ∧ 0 ≤ 𝐾𝐾𝑁) → (𝑁 ∈ ℤ → 𝜏))
392, 38syl5 32 . . . . 5 ((𝐾 ∈ ℤ ∧ 0 ≤ 𝐾𝐾𝑁) → (𝑁 ∈ ℕ0𝜏))
40393expa 1143 . . . 4 (((𝐾 ∈ ℤ ∧ 0 ≤ 𝐾) ∧ 𝐾𝑁) → (𝑁 ∈ ℕ0𝜏))
411, 40sylanb 278 . . 3 ((𝐾 ∈ ℕ0𝐾𝑁) → (𝑁 ∈ ℕ0𝜏))
4241impcom 123 . 2 ((𝑁 ∈ ℕ0 ∧ (𝐾 ∈ ℕ0𝐾𝑁)) → 𝜏)
43423impb 1139 1 ((𝑁 ∈ ℕ0𝐾 ∈ ℕ0𝐾𝑁) → 𝜏)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 102  wb 103  w3a 924   = wceq 1289  wcel 1438   class class class wbr 3837  (class class class)co 5634  cr 7328  0cc0 7329  1c1 7330   + caddc 7332   < clt 7501  cle 7502  0cn0 8643  cz 8720
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 579  ax-in2 580  ax-io 665  ax-5 1381  ax-7 1382  ax-gen 1383  ax-ie1 1427  ax-ie2 1428  ax-8 1440  ax-10 1441  ax-11 1442  ax-i12 1443  ax-bndl 1444  ax-4 1445  ax-13 1449  ax-14 1450  ax-17 1464  ax-i9 1468  ax-ial 1472  ax-i5r 1473  ax-ext 2070  ax-sep 3949  ax-pow 4001  ax-pr 4027  ax-un 4251  ax-setind 4343  ax-cnex 7415  ax-resscn 7416  ax-1cn 7417  ax-1re 7418  ax-icn 7419  ax-addcl 7420  ax-addrcl 7421  ax-mulcl 7422  ax-addcom 7424  ax-addass 7426  ax-distr 7428  ax-i2m1 7429  ax-0lt1 7430  ax-0id 7432  ax-rnegex 7433  ax-cnre 7435  ax-pre-ltirr 7436  ax-pre-ltwlin 7437  ax-pre-lttrn 7438  ax-pre-ltadd 7440
This theorem depends on definitions:  df-bi 115  df-3or 925  df-3an 926  df-tru 1292  df-fal 1295  df-nf 1395  df-sb 1693  df-eu 1951  df-mo 1952  df-clab 2075  df-cleq 2081  df-clel 2084  df-nfc 2217  df-ne 2256  df-nel 2351  df-ral 2364  df-rex 2365  df-reu 2366  df-rab 2368  df-v 2621  df-sbc 2839  df-dif 2999  df-un 3001  df-in 3003  df-ss 3010  df-pw 3427  df-sn 3447  df-pr 3448  df-op 3450  df-uni 3649  df-int 3684  df-br 3838  df-opab 3892  df-id 4111  df-xp 4434  df-rel 4435  df-cnv 4436  df-co 4437  df-dm 4438  df-iota 4967  df-fun 5004  df-fv 5010  df-riota 5590  df-ov 5637  df-oprab 5638  df-mpt2 5639  df-pnf 7503  df-mnf 7504  df-xr 7505  df-ltxr 7506  df-le 7507  df-sub 7634  df-neg 7635  df-inn 8395  df-n0 8644  df-z 8721
This theorem is referenced by:  nn0seqcvgd  11116
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