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Theorem 2rexfrabdioph 39271
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 39259 . . . 4 ([(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝑤 ∈ ℕ0 𝜑 ↔ ∃𝑤 ∈ ℕ0 [(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑)
21rabbii 3471 . . 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 11925 . . . . . 6 (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ0)
53, 4eqeltrid 2914 . . . . 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 39266 . . . . . . . . 9 ([(𝑡𝐿) / 𝑤][(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣]𝜑[(𝑎 ↾ (1...𝑁)) / 𝑢][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑)
87sbcbii 3826 . . . . . . . 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 5840 . . . . . . . . . 10 (𝑎 = (𝑡 ↾ (1...𝑀)) → (𝑎 ↾ (1...𝑁)) = ((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)))
109sbccomieg 39268 . . . . . . . . 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 12938 . . . . . . . . . . . 12 (1...𝑁) ⊆ (1...(𝑁 + 1))
123oveq2i 7156 . . . . . . . . . . . 12 (1...𝑀) = (1...(𝑁 + 1))
1311, 12sseqtrri 4001 . . . . . . . . . . 11 (1...𝑁) ⊆ (1...𝑀)
14 resabs1 5876 . . . . . . . . . . 11 ((1...𝑁) ⊆ (1...𝑀) → ((𝑡 ↾ (1...𝑀)) ↾ (1...𝑁)) = (𝑡 ↾ (1...𝑁)))
15 dfsbcq 3771 . . . . . . . . . . 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 3495 . . . . . . . . . . . . . 14 𝑡 ∈ V
1817resex 5892 . . . . . . . . . . . . 13 (𝑡 ↾ (1...𝑀)) ∈ V
19 fveq1 6662 . . . . . . . . . . . . . 14 (𝑎 = (𝑡 ↾ (1...𝑀)) → (𝑎𝑀) = ((𝑡 ↾ (1...𝑀))‘𝑀))
2019sbcco3gw 4371 . . . . . . . . . . . . 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 11924 . . . . . . . . . . . . . . 15 (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ)
233, 22eqeltrid 2914 . . . . . . . . . . . . . 14 (𝑁 ∈ ℕ0𝑀 ∈ ℕ)
24 elfz1end 12925 . . . . . . . . . . . . . 14 (𝑀 ∈ ℕ ↔ 𝑀 ∈ (1...𝑀))
2523, 24sylib 219 . . . . . . . . . . . . 13 (𝑁 ∈ ℕ0𝑀 ∈ (1...𝑀))
26 fvres 6682 . . . . . . . . . . . . 13 (𝑀 ∈ (1...𝑀) → ((𝑡 ↾ (1...𝑀))‘𝑀) = (𝑡𝑀))
27 dfsbcq 3771 . . . . . . . . . . . . 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 284 . . . . . . . . . . 11 (𝑁 ∈ ℕ0 → ([(𝑡 ↾ (1...𝑀)) / 𝑎][(𝑎𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑[(𝑡𝑀) / 𝑣][(𝑡𝐿) / 𝑤]𝜑))
3029sbcbidv 3824 . . . . . . . . . 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 284 . . . . . . . . 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 284 . . . . . . . 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 285 . . . . . . 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 3478 . . . . . 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 2894 . . . . 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 39270 . . . 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 2914 . 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 39270 . 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 207  wa 396   = wceq 1528  wcel 2105  wrex 3136  {crab 3139  Vcvv 3492  [wsbc 3769  wss 3933  cres 5550  cfv 6348  (class class class)co 7145  m cmap 8395  1c1 10526   + caddc 10528  cn 11626  0cn0 11885  ...cfz 12880  Diophcdioph 39230
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1787  ax-4 1801  ax-5 1902  ax-6 1961  ax-7 2006  ax-8 2107  ax-9 2115  ax-10 2136  ax-11 2151  ax-12 2167  ax-ext 2790  ax-rep 5181  ax-sep 5194  ax-nul 5201  ax-pow 5257  ax-pr 5320  ax-un 7450  ax-inf2 9092  ax-cnex 10581  ax-resscn 10582  ax-1cn 10583  ax-icn 10584  ax-addcl 10585  ax-addrcl 10586  ax-mulcl 10587  ax-mulrcl 10588  ax-mulcom 10589  ax-addass 10590  ax-mulass 10591  ax-distr 10592  ax-i2m1 10593  ax-1ne0 10594  ax-1rid 10595  ax-rnegex 10596  ax-rrecex 10597  ax-cnre 10598  ax-pre-lttri 10599  ax-pre-lttrn 10600  ax-pre-ltadd 10601  ax-pre-mulgt0 10602
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 842  df-3or 1080  df-3an 1081  df-tru 1531  df-ex 1772  df-nf 1776  df-sb 2061  df-mo 2615  df-eu 2647  df-clab 2797  df-cleq 2811  df-clel 2890  df-nfc 2960  df-ne 3014  df-nel 3121  df-ral 3140  df-rex 3141  df-reu 3142  df-rmo 3143  df-rab 3144  df-v 3494  df-sbc 3770  df-csb 3881  df-dif 3936  df-un 3938  df-in 3940  df-ss 3949  df-pss 3951  df-nul 4289  df-if 4464  df-pw 4537  df-sn 4558  df-pr 4560  df-tp 4562  df-op 4564  df-uni 4831  df-int 4868  df-iun 4912  df-br 5058  df-opab 5120  df-mpt 5138  df-tr 5164  df-id 5453  df-eprel 5458  df-po 5467  df-so 5468  df-fr 5507  df-we 5509  df-xp 5554  df-rel 5555  df-cnv 5556  df-co 5557  df-dm 5558  df-rn 5559  df-res 5560  df-ima 5561  df-pred 6141  df-ord 6187  df-on 6188  df-lim 6189  df-suc 6190  df-iota 6307  df-fun 6350  df-fn 6351  df-f 6352  df-f1 6353  df-fo 6354  df-f1o 6355  df-fv 6356  df-riota 7103  df-ov 7148  df-oprab 7149  df-mpo 7150  df-of 7398  df-om 7570  df-1st 7678  df-2nd 7679  df-wrecs 7936  df-recs 7997  df-rdg 8035  df-1o 8091  df-oadd 8095  df-er 8278  df-map 8397  df-en 8498  df-dom 8499  df-sdom 8500  df-fin 8501  df-dju 9318  df-card 9356  df-pnf 10665  df-mnf 10666  df-xr 10667  df-ltxr 10668  df-le 10669  df-sub 10860  df-neg 10861  df-nn 11627  df-n0 11886  df-z 11970  df-uz 12232  df-fz 12881  df-hash 13679  df-mzpcl 39198  df-mzp 39199  df-dioph 39231
This theorem is referenced by:  3rexfrabdioph  39272  4rexfrabdioph  39273  6rexfrabdioph  39274
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