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Theorem 2rexfrabdioph 41519
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 41507 . . . 4 ([(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝑤 ∈ ℕ0 𝜑 ↔ ∃𝑤 ∈ ℕ0 [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑)
21rabbii 3438 . . 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 12508 . . . . . 6 (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ0)
53, 4eqeltrid 2837 . . . . 5 (𝑁 ∈ ℕ0𝑀 ∈ ℕ0)
65adantr 481 . . . 4 ((𝑁 ∈ ℕ0 ∧ {𝑡 ∈ (ℕ0m (1...𝐿)) ∣ [(𝑡 ↾ (1...𝑁)) / 𝑢][(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑} ∈ (Dioph‘𝐿)) → 𝑀 ∈ ℕ0)
7 sbcrot3 41514 . . . . . . . . 9 ([(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑[(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑)
87sbcbii 3836 . . . . . . . 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 5973 . . . . . . . . . 10 (𝑎 = (𝑡 ↾ (1...𝑀)) → (𝑎 ↾ (1...𝑁)) = ((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)))
109sbccomieg 41516 . . . . . . . . 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 13540 . . . . . . . . . . . 12 (1...𝑁) ⊆ (1...(𝑁 + 1))
123oveq2i 7416 . . . . . . . . . . . 12 (1...𝑀) = (1...(𝑁 + 1))
1311, 12sseqtrri 4018 . . . . . . . . . . 11 (1...𝑁) ⊆ (1...𝑀)
14 resabs1 6009 . . . . . . . . . . 11 ((1...𝑁) ⊆ (1...𝑀) → ((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)) = (𝑡 ↾ (1...𝑁)))
15 dfsbcq 3778 . . . . . . . . . . 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 3478 . . . . . . . . . . . . . 14 𝑡 ∈ V
1817resex 6027 . . . . . . . . . . . . 13 (𝑡 ↾ (1...𝑀)) ∈ V
19 fveq1 6887 . . . . . . . . . . . . . 14 (𝑎 = (𝑡 ↾ (1...𝑀)) → (𝑎𝑀) = ((𝑡 ↾ (1...𝑀))‘𝑀))
2019sbcco3gw 4421 . . . . . . . . . . . . 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 12507 . . . . . . . . . . . . . . 15 (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ)
233, 22eqeltrid 2837 . . . . . . . . . . . . . 14 (𝑁 ∈ ℕ0𝑀 ∈ ℕ)
24 elfz1end 13527 . . . . . . . . . . . . . 14 (𝑀 ∈ ℕ ↔ 𝑀 ∈ (1...𝑀))
2523, 24sylib 217 . . . . . . . . . . . . 13 (𝑁 ∈ ℕ0𝑀 ∈ (1...𝑀))
26 fvres 6907 . . . . . . . . . . . . 13 (𝑀 ∈ (1...𝑀) → ((𝑡 ↾ (1...𝑀))‘𝑀) = (𝑡𝑀))
27 dfsbcq 3778 . . . . . . . . . . . . 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, 28bitrid 282 . . . . . . . . . . 11 (𝑁 ∈ ℕ0 → ([(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
3029sbcbidv 3835 . . . . . . . . . 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, 30bitrid 282 . . . . . . . . 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, 31bitrid 282 . . . . . . . 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, 32bitr2id 283 . . . . . . 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 3440 . . . . . 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 2818 . . . . 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 477 . . . 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 41518 . . . 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 584 . . 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, 39eqeltrid 2837 . 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 41518 . 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 591 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 205  wa 396   = wceq 1541  wcel 2106  wrex 3070  {crab 3432  Vcvv 3474  [wsbc 3776  wss 3947  cres 5677  cfv 6540  (class class class)co 7405  m cmap 8816  1c1 11107   + caddc 11109  cn 12208  0cn0 12468  ...cfz 13480  Diophcdioph 41478
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 2703  ax-rep 5284  ax-sep 5298  ax-nul 5305  ax-pow 5362  ax-pr 5426  ax-un 7721  ax-inf2 9632  ax-cnex 11162  ax-resscn 11163  ax-1cn 11164  ax-icn 11165  ax-addcl 11166  ax-addrcl 11167  ax-mulcl 11168  ax-mulrcl 11169  ax-mulcom 11170  ax-addass 11171  ax-mulass 11172  ax-distr 11173  ax-i2m1 11174  ax-1ne0 11175  ax-1rid 11176  ax-rnegex 11177  ax-rrecex 11178  ax-cnre 11179  ax-pre-lttri 11180  ax-pre-lttrn 11181  ax-pre-ltadd 11182  ax-pre-mulgt0 11183
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 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-ne 2941  df-nel 3047  df-ral 3062  df-rex 3071  df-reu 3377  df-rab 3433  df-v 3476  df-sbc 3777  df-csb 3893  df-dif 3950  df-un 3952  df-in 3954  df-ss 3964  df-pss 3966  df-nul 4322  df-if 4528  df-pw 4603  df-sn 4628  df-pr 4630  df-op 4634  df-uni 4908  df-int 4950  df-iun 4998  df-br 5148  df-opab 5210  df-mpt 5231  df-tr 5265  df-id 5573  df-eprel 5579  df-po 5587  df-so 5588  df-fr 5630  df-we 5632  df-xp 5681  df-rel 5682  df-cnv 5683  df-co 5684  df-dm 5685  df-rn 5686  df-res 5687  df-ima 5688  df-pred 6297  df-ord 6364  df-on 6365  df-lim 6366  df-suc 6367  df-iota 6492  df-fun 6542  df-fn 6543  df-f 6544  df-f1 6545  df-fo 6546  df-f1o 6547  df-fv 6548  df-riota 7361  df-ov 7408  df-oprab 7409  df-mpo 7410  df-of 7666  df-om 7852  df-1st 7971  df-2nd 7972  df-frecs 8262  df-wrecs 8293  df-recs 8367  df-rdg 8406  df-1o 8462  df-oadd 8466  df-er 8699  df-map 8818  df-en 8936  df-dom 8937  df-sdom 8938  df-fin 8939  df-dju 9892  df-card 9930  df-pnf 11246  df-mnf 11247  df-xr 11248  df-ltxr 11249  df-le 11250  df-sub 11442  df-neg 11443  df-nn 12209  df-n0 12469  df-z 12555  df-uz 12819  df-fz 13481  df-hash 14287  df-mzpcl 41446  df-mzp 41447  df-dioph 41479
This theorem is referenced by:  3rexfrabdioph  41520  4rexfrabdioph  41521  6rexfrabdioph  41522
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