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Theorem 2rexfrabdioph 37677
Description: Diophantine set builder for existential quantifier, explicit substitution, two variables. (Contributed by Stefan O'Rear, 11-Oct-2014.) (Revised by Stefan O'Rear, 6-May-2015.)
Hypotheses
Ref Expression
rexfrabdioph.1 𝑀 = (𝑁 + 1)
rexfrabdioph.2 𝐿 = (𝑀 + 1)
Assertion
Ref Expression
2rexfrabdioph ((𝑁 ∈ ℕ0 ∧ {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} ∈ (Dioph‘𝐿)) → {𝑢 ∈ (ℕ0𝑚 (1...𝑁)) ∣ ∃𝑣 ∈ ℕ0𝑤 ∈ ℕ0 𝜑} ∈ (Dioph‘𝑁))
Distinct variable groups:   𝑢,𝑡,𝑣,𝑤,𝐿   𝑡,𝑀,𝑢,𝑣,𝑤   𝑡,𝑁,𝑢,𝑣,𝑤   𝜑,𝑡
Allowed substitution hints:   𝜑(𝑤,𝑣,𝑢)

Proof of Theorem 2rexfrabdioph
Dummy variable 𝑎 is distinct from all other variables.
StepHypRef Expression
1 2sbcrex 37665 . . . 4 ([(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝑤 ∈ ℕ0 𝜑 ↔ ∃𝑤 ∈ ℕ0 [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑)
21rabbii 3216 . . 3 {𝑎 ∈ (ℕ0𝑚 (1...𝑀)) ∣ [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝑤 ∈ ℕ0 𝜑} = {𝑎 ∈ (ℕ0𝑚 (1...𝑀)) ∣ ∃𝑤 ∈ ℕ0 [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑}
3 rexfrabdioph.1 . . . . . 6 𝑀 = (𝑁 + 1)
4 peano2nn0 11371 . . . . . 6 (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ0)
53, 4syl5eqel 2734 . . . . 5 (𝑁 ∈ ℕ0𝑀 ∈ ℕ0)
65adantr 480 . . . 4 ((𝑁 ∈ ℕ0 ∧ {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} ∈ (Dioph‘𝐿)) → 𝑀 ∈ ℕ0)
7 sbcrot3 37672 . . . . . . . . 9 ([(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑[(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑)
87sbcbii 3524 . . . . . . . 8 ([(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑[(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑)
9 reseq1 5422 . . . . . . . . . 10 (𝑎 = (𝑡 ↾ (1...𝑀)) → (𝑎 ↾ (1...𝑁)) = ((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)))
109sbccomieg 37674 . . . . . . . . 9 ([(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)) / 𝑢][(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑)
11 fzssp1 12422 . . . . . . . . . . . 12 (1...𝑁) ⊆ (1...(𝑁 + 1))
123oveq2i 6701 . . . . . . . . . . . 12 (1...𝑀) = (1...(𝑁 + 1))
1311, 12sseqtr4i 3671 . . . . . . . . . . 11 (1...𝑁) ⊆ (1...𝑀)
14 resabs1 5462 . . . . . . . . . . 11 ((1...𝑁) ⊆ (1...𝑀) → ((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)) = (𝑡 ↾ (1...𝑁)))
15 dfsbcq 3470 . . . . . . . . . . 11 (((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)) = (𝑡 ↾ (1...𝑁)) → ([((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)) / 𝑢][(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
1613, 14, 15mp2b 10 . . . . . . . . . 10 ([((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)) / 𝑢][(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑)
17 vex 3234 . . . . . . . . . . . . . 14 𝑡 ∈ V
1817resex 5478 . . . . . . . . . . . . 13 (𝑡 ↾ (1...𝑀)) ∈ V
19 fveq1 6228 . . . . . . . . . . . . . 14 (𝑎 = (𝑡 ↾ (1...𝑀)) → (𝑎𝑀) = ((𝑡 ↾ (1...𝑀))‘𝑀))
2019sbcco3g 4032 . . . . . . . . . . . . 13 ((𝑡 ↾ (1...𝑀)) ∈ V → ([(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[((𝑡 ↾ (1...𝑀))‘𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
2118, 20ax-mp 5 . . . . . . . . . . . 12 ([(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[((𝑡 ↾ (1...𝑀))‘𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑)
22 nn0p1nn 11370 . . . . . . . . . . . . . . 15 (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ)
233, 22syl5eqel 2734 . . . . . . . . . . . . . 14 (𝑁 ∈ ℕ0𝑀 ∈ ℕ)
24 elfz1end 12409 . . . . . . . . . . . . . 14 (𝑀 ∈ ℕ ↔ 𝑀 ∈ (1...𝑀))
2523, 24sylib 208 . . . . . . . . . . . . 13 (𝑁 ∈ ℕ0𝑀 ∈ (1...𝑀))
26 fvres 6245 . . . . . . . . . . . . 13 (𝑀 ∈ (1...𝑀) → ((𝑡 ↾ (1...𝑀))‘𝑀) = (𝑡𝑀))
27 dfsbcq 3470 . . . . . . . . . . . . 13 (((𝑡 ↾ (1...𝑀))‘𝑀) = (𝑡𝑀) → ([((𝑡 ↾ (1...𝑀))‘𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
2825, 26, 273syl 18 . . . . . . . . . . . 12 (𝑁 ∈ ℕ0 → ([((𝑡 ↾ (1...𝑀))‘𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
2921, 28syl5bb 272 . . . . . . . . . . 11 (𝑁 ∈ ℕ0 → ([(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
3029sbcbidv 3523 . . . . . . . . . 10 (𝑁 ∈ ℕ0 → ([(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
3116, 30syl5bb 272 . . . . . . . . 9 (𝑁 ∈ ℕ0 → ([((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)) / 𝑢][(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
3210, 31syl5bb 272 . . . . . . . 8 (𝑁 ∈ ℕ0 → ([(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
338, 32syl5rbb 273 . . . . . . 7 (𝑁 ∈ ℕ0 → ([(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑))
3433rabbidv 3220 . . . . . 6 (𝑁 ∈ ℕ0 → {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} = {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑})
3534eleq1d 2715 . . . . 5 (𝑁 ∈ ℕ0 → ({𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} ∈ (Dioph‘𝐿) ↔ {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑} ∈ (Dioph‘𝐿)))
3635biimpa 500 . . . 4 ((𝑁 ∈ ℕ0 ∧ {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} ∈ (Dioph‘𝐿)) → {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑} ∈ (Dioph‘𝐿))
37 rexfrabdioph.2 . . . . 5 𝐿 = (𝑀 + 1)
3837rexfrabdioph 37676 . . . 4 ((𝑀 ∈ ℕ0 ∧ {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑} ∈ (Dioph‘𝐿)) → {𝑎 ∈ (ℕ0𝑚 (1...𝑀)) ∣ ∃𝑤 ∈ ℕ0 [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑} ∈ (Dioph‘𝑀))
396, 36, 38syl2anc 694 . . 3 ((𝑁 ∈ ℕ0 ∧ {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} ∈ (Dioph‘𝐿)) → {𝑎 ∈ (ℕ0𝑚 (1...𝑀)) ∣ ∃𝑤 ∈ ℕ0 [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑} ∈ (Dioph‘𝑀))
402, 39syl5eqel 2734 . 2 ((𝑁 ∈ ℕ0 ∧ {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} ∈ (Dioph‘𝐿)) → {𝑎 ∈ (ℕ0𝑚 (1...𝑀)) ∣ [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝑤 ∈ ℕ0 𝜑} ∈ (Dioph‘𝑀))
413rexfrabdioph 37676 . 2 ((𝑁 ∈ ℕ0 ∧ {𝑎 ∈ (ℕ0𝑚 (1...𝑀)) ∣ [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝑤 ∈ ℕ0 𝜑} ∈ (Dioph‘𝑀)) → {𝑢 ∈ (ℕ0𝑚 (1...𝑁)) ∣ ∃𝑣 ∈ ℕ0𝑤 ∈ ℕ0 𝜑} ∈ (Dioph‘𝑁))
4240, 41syldan 486 1 ((𝑁 ∈ ℕ0 ∧ {𝑡 ∈ (ℕ0𝑚 (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} ∈ (Dioph‘𝐿)) → {𝑢 ∈ (ℕ0𝑚 (1...𝑁)) ∣ ∃𝑣 ∈ ℕ0𝑤 ∈ ℕ0 𝜑} ∈ (Dioph‘𝑁))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383   = wceq 1523  wcel 2030  wrex 2942  {crab 2945  Vcvv 3231  [wsbc 3468  wss 3607  cres 5145  cfv 5926  (class class class)co 6690  𝑚 cmap 7899  1c1 9975   + caddc 9977  cn 11058  0cn0 11330  ...cfz 12364  Diophcdioph 37635
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-inf2 8576  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-of 6939  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-oadd 7609  df-er 7787  df-map 7901  df-en 7998  df-dom 7999  df-sdom 8000  df-fin 8001  df-card 8803  df-cda 9028  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-nn 11059  df-n0 11331  df-z 11416  df-uz 11726  df-fz 12365  df-hash 13158  df-mzpcl 37603  df-mzp 37604  df-dioph 37636
This theorem is referenced by:  3rexfrabdioph  37678  4rexfrabdioph  37679  6rexfrabdioph  37680
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