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Theorem nn0min 29872
Description: Extracting the minimum positive integer for which a property 𝜒 does not hold. This uses substitutions similar to nn0ind 11660. (Contributed by Thierry Arnoux, 6-May-2018.)
Hypotheses
Ref Expression
nn0min.0 (𝑛 = 0 → (𝜓𝜒))
nn0min.1 (𝑛 = 𝑚 → (𝜓𝜃))
nn0min.2 (𝑛 = (𝑚 + 1) → (𝜓𝜏))
nn0min.3 (𝜑 → ¬ 𝜒)
nn0min.4 (𝜑 → ∃𝑛 ∈ ℕ 𝜓)
Assertion
Ref Expression
nn0min (𝜑 → ∃𝑚 ∈ ℕ0𝜃𝜏))
Distinct variable groups:   𝑚,𝑛,𝜑   𝜓,𝑚   𝜏,𝑛   𝜃,𝑛   𝜒,𝑚,𝑛
Allowed substitution hints:   𝜓(𝑛)   𝜃(𝑚)   𝜏(𝑚)

Proof of Theorem nn0min
Dummy variable 𝑘 is distinct from all other variables.
StepHypRef Expression
1 nn0min.4 . . . . 5 (𝜑 → ∃𝑛 ∈ ℕ 𝜓)
21adantr 472 . . . 4 ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ∃𝑛 ∈ ℕ 𝜓)
3 nfv 1988 . . . . . . . . . 10 𝑚𝜑
4 nfra1 3075 . . . . . . . . . 10 𝑚𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)
53, 4nfan 1973 . . . . . . . . 9 𝑚(𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏))
6 nfv 1988 . . . . . . . . 9 𝑚 ¬ [𝑘 / 𝑛]𝜓
75, 6nfim 1970 . . . . . . . 8 𝑚((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ [𝑘 / 𝑛]𝜓)
8 dfsbcq2 3575 . . . . . . . . . 10 (𝑘 = 1 → ([𝑘 / 𝑛]𝜓[1 / 𝑛]𝜓))
98notbid 307 . . . . . . . . 9 (𝑘 = 1 → (¬ [𝑘 / 𝑛]𝜓 ↔ ¬ [1 / 𝑛]𝜓))
109imbi2d 329 . . . . . . . 8 (𝑘 = 1 → (((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ [𝑘 / 𝑛]𝜓) ↔ ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ [1 / 𝑛]𝜓)))
11 nfv 1988 . . . . . . . . . . 11 𝑛𝜃
12 nn0min.1 . . . . . . . . . . 11 (𝑛 = 𝑚 → (𝜓𝜃))
1311, 12sbhypf 3389 . . . . . . . . . 10 (𝑘 = 𝑚 → ([𝑘 / 𝑛]𝜓𝜃))
1413notbid 307 . . . . . . . . 9 (𝑘 = 𝑚 → (¬ [𝑘 / 𝑛]𝜓 ↔ ¬ 𝜃))
1514imbi2d 329 . . . . . . . 8 (𝑘 = 𝑚 → (((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ [𝑘 / 𝑛]𝜓) ↔ ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ 𝜃)))
16 nfv 1988 . . . . . . . . . . 11 𝑛𝜏
17 nn0min.2 . . . . . . . . . . 11 (𝑛 = (𝑚 + 1) → (𝜓𝜏))
1816, 17sbhypf 3389 . . . . . . . . . 10 (𝑘 = (𝑚 + 1) → ([𝑘 / 𝑛]𝜓𝜏))
1918notbid 307 . . . . . . . . 9 (𝑘 = (𝑚 + 1) → (¬ [𝑘 / 𝑛]𝜓 ↔ ¬ 𝜏))
2019imbi2d 329 . . . . . . . 8 (𝑘 = (𝑚 + 1) → (((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ [𝑘 / 𝑛]𝜓) ↔ ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ 𝜏)))
21 sbequ12r 2255 . . . . . . . . . 10 (𝑘 = 𝑛 → ([𝑘 / 𝑛]𝜓𝜓))
2221notbid 307 . . . . . . . . 9 (𝑘 = 𝑛 → (¬ [𝑘 / 𝑛]𝜓 ↔ ¬ 𝜓))
2322imbi2d 329 . . . . . . . 8 (𝑘 = 𝑛 → (((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ [𝑘 / 𝑛]𝜓) ↔ ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ 𝜓)))
24 nn0min.3 . . . . . . . . 9 (𝜑 → ¬ 𝜒)
25 0nn0 11495 . . . . . . . . . 10 0 ∈ ℕ0
2611, 12sbie 2541 . . . . . . . . . . . . . 14 ([𝑚 / 𝑛]𝜓𝜃)
27 nfv 1988 . . . . . . . . . . . . . . 15 𝑛𝜒
28 nn0min.0 . . . . . . . . . . . . . . 15 (𝑛 = 0 → (𝜓𝜒))
2927, 28sbhypf 3389 . . . . . . . . . . . . . 14 (𝑚 = 0 → ([𝑚 / 𝑛]𝜓𝜒))
3026, 29syl5bbr 274 . . . . . . . . . . . . 13 (𝑚 = 0 → (𝜃𝜒))
3130notbid 307 . . . . . . . . . . . 12 (𝑚 = 0 → (¬ 𝜃 ↔ ¬ 𝜒))
32 oveq1 6816 . . . . . . . . . . . . . . . 16 (𝑚 = 0 → (𝑚 + 1) = (0 + 1))
33 0p1e1 11320 . . . . . . . . . . . . . . . 16 (0 + 1) = 1
3432, 33syl6eq 2806 . . . . . . . . . . . . . . 15 (𝑚 = 0 → (𝑚 + 1) = 1)
35 1nn 11219 . . . . . . . . . . . . . . . 16 1 ∈ ℕ
36 eleq1 2823 . . . . . . . . . . . . . . . 16 ((𝑚 + 1) = 1 → ((𝑚 + 1) ∈ ℕ ↔ 1 ∈ ℕ))
3735, 36mpbiri 248 . . . . . . . . . . . . . . 15 ((𝑚 + 1) = 1 → (𝑚 + 1) ∈ ℕ)
3817sbcieg 3605 . . . . . . . . . . . . . . 15 ((𝑚 + 1) ∈ ℕ → ([(𝑚 + 1) / 𝑛]𝜓𝜏))
3934, 37, 383syl 18 . . . . . . . . . . . . . 14 (𝑚 = 0 → ([(𝑚 + 1) / 𝑛]𝜓𝜏))
4034sbceq1d 3577 . . . . . . . . . . . . . 14 (𝑚 = 0 → ([(𝑚 + 1) / 𝑛]𝜓[1 / 𝑛]𝜓))
4139, 40bitr3d 270 . . . . . . . . . . . . 13 (𝑚 = 0 → (𝜏[1 / 𝑛]𝜓))
4241notbid 307 . . . . . . . . . . . 12 (𝑚 = 0 → (¬ 𝜏 ↔ ¬ [1 / 𝑛]𝜓))
4331, 42imbi12d 333 . . . . . . . . . . 11 (𝑚 = 0 → ((¬ 𝜃 → ¬ 𝜏) ↔ (¬ 𝜒 → ¬ [1 / 𝑛]𝜓)))
4443rspcv 3441 . . . . . . . . . 10 (0 ∈ ℕ0 → (∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏) → (¬ 𝜒 → ¬ [1 / 𝑛]𝜓)))
4525, 44ax-mp 5 . . . . . . . . 9 (∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏) → (¬ 𝜒 → ¬ [1 / 𝑛]𝜓))
4624, 45mpan9 487 . . . . . . . 8 ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ [1 / 𝑛]𝜓)
47 cbvralsv 3317 . . . . . . . . . . 11 (∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏) ↔ ∀𝑘 ∈ ℕ0 [𝑘 / 𝑚](¬ 𝜃 → ¬ 𝜏))
48 nnnn0 11487 . . . . . . . . . . . 12 (𝑚 ∈ ℕ → 𝑚 ∈ ℕ0)
49 sbequ12r 2255 . . . . . . . . . . . . 13 (𝑘 = 𝑚 → ([𝑘 / 𝑚](¬ 𝜃 → ¬ 𝜏) ↔ (¬ 𝜃 → ¬ 𝜏)))
5049rspcv 3441 . . . . . . . . . . . 12 (𝑚 ∈ ℕ0 → (∀𝑘 ∈ ℕ0 [𝑘 / 𝑚](¬ 𝜃 → ¬ 𝜏) → (¬ 𝜃 → ¬ 𝜏)))
5148, 50syl 17 . . . . . . . . . . 11 (𝑚 ∈ ℕ → (∀𝑘 ∈ ℕ0 [𝑘 / 𝑚](¬ 𝜃 → ¬ 𝜏) → (¬ 𝜃 → ¬ 𝜏)))
5247, 51syl5bi 232 . . . . . . . . . 10 (𝑚 ∈ ℕ → (∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏) → (¬ 𝜃 → ¬ 𝜏)))
5352adantld 484 . . . . . . . . 9 (𝑚 ∈ ℕ → ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → (¬ 𝜃 → ¬ 𝜏)))
5453a2d 29 . . . . . . . 8 (𝑚 ∈ ℕ → (((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ 𝜃) → ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ 𝜏)))
557, 10, 15, 20, 23, 46, 54nnindf 29870 . . . . . . 7 (𝑛 ∈ ℕ → ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ 𝜓))
5655rgen 3056 . . . . . 6 𝑛 ∈ ℕ ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ 𝜓)
57 r19.21v 3094 . . . . . 6 (∀𝑛 ∈ ℕ ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ 𝜓) ↔ ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ∀𝑛 ∈ ℕ ¬ 𝜓))
5856, 57mpbi 220 . . . . 5 ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ∀𝑛 ∈ ℕ ¬ 𝜓)
59 ralnex 3126 . . . . 5 (∀𝑛 ∈ ℕ ¬ 𝜓 ↔ ¬ ∃𝑛 ∈ ℕ 𝜓)
6058, 59sylib 208 . . . 4 ((𝜑 ∧ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏)) → ¬ ∃𝑛 ∈ ℕ 𝜓)
612, 60pm2.65da 601 . . 3 (𝜑 → ¬ ∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏))
62 imnan 437 . . . 4 ((¬ 𝜃 → ¬ 𝜏) ↔ ¬ (¬ 𝜃𝜏))
6362ralbii 3114 . . 3 (∀𝑚 ∈ ℕ0𝜃 → ¬ 𝜏) ↔ ∀𝑚 ∈ ℕ0 ¬ (¬ 𝜃𝜏))
6461, 63sylnib 317 . 2 (𝜑 → ¬ ∀𝑚 ∈ ℕ0 ¬ (¬ 𝜃𝜏))
65 dfrex2 3130 . 2 (∃𝑚 ∈ ℕ0𝜃𝜏) ↔ ¬ ∀𝑚 ∈ ℕ0 ¬ (¬ 𝜃𝜏))
6664, 65sylibr 224 1 (𝜑 → ∃𝑚 ∈ ℕ0𝜃𝜏))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 383   = wceq 1628  [wsb 2042  wcel 2135  wral 3046  wrex 3047  [wsbc 3572  (class class class)co 6809  0cc0 10124  1c1 10125   + caddc 10127  cn 11208  0cn0 11480
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1867  ax-4 1882  ax-5 1984  ax-6 2050  ax-7 2086  ax-8 2137  ax-9 2144  ax-10 2164  ax-11 2179  ax-12 2192  ax-13 2387  ax-ext 2736  ax-sep 4929  ax-nul 4937  ax-pow 4988  ax-pr 5051  ax-un 7110  ax-resscn 10181  ax-1cn 10182  ax-icn 10183  ax-addcl 10184  ax-addrcl 10185  ax-mulcl 10186  ax-mulrcl 10187  ax-mulcom 10188  ax-addass 10189  ax-mulass 10190  ax-distr 10191  ax-i2m1 10192  ax-1ne0 10193  ax-1rid 10194  ax-rnegex 10195  ax-rrecex 10196  ax-cnre 10197  ax-pre-lttri 10198  ax-pre-lttrn 10199  ax-pre-ltadd 10200
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1073  df-3an 1074  df-tru 1631  df-ex 1850  df-nf 1855  df-sb 2043  df-eu 2607  df-mo 2608  df-clab 2743  df-cleq 2749  df-clel 2752  df-nfc 2887  df-ne 2929  df-nel 3032  df-ral 3051  df-rex 3052  df-reu 3053  df-rab 3055  df-v 3338  df-sbc 3573  df-csb 3671  df-dif 3714  df-un 3716  df-in 3718  df-ss 3725  df-pss 3727  df-nul 4055  df-if 4227  df-pw 4300  df-sn 4318  df-pr 4320  df-tp 4322  df-op 4324  df-uni 4585  df-iun 4670  df-br 4801  df-opab 4861  df-mpt 4878  df-tr 4901  df-id 5170  df-eprel 5175  df-po 5183  df-so 5184  df-fr 5221  df-we 5223  df-xp 5268  df-rel 5269  df-cnv 5270  df-co 5271  df-dm 5272  df-rn 5273  df-res 5274  df-ima 5275  df-pred 5837  df-ord 5883  df-on 5884  df-lim 5885  df-suc 5886  df-iota 6008  df-fun 6047  df-fn 6048  df-f 6049  df-f1 6050  df-fo 6051  df-f1o 6052  df-fv 6053  df-ov 6812  df-om 7227  df-wrecs 7572  df-recs 7633  df-rdg 7671  df-er 7907  df-en 8118  df-dom 8119  df-sdom 8120  df-pnf 10264  df-mnf 10265  df-ltxr 10267  df-nn 11209  df-n0 11481
This theorem is referenced by:  archirng  30047
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