Theorem frecuzrdg0 10774

Description: Initial value of a recursive definition generator on upper integers. See comment in frec2uz0d 10760 for the description of 𝐺 as the mapping from ω to (ℤ_≥‘𝐶). (Contributed by Jim Kingdon, 27-May-2020.)

Hypotheses

Ref	Expression
frec2uz.1	⊢ (𝜑 → 𝐶 ∈ ℤ)
frec2uz.2	⊢ 𝐺 = frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)
frecuzrdgrrn.a	⊢ (𝜑 → 𝐴 ∈ 𝑆)
frecuzrdgrrn.f	⊢ ((𝜑 ∧ (𝑥 ∈ (ℤ≥‘𝐶) ∧ 𝑦 ∈ 𝑆)) → (𝑥𝐹𝑦) ∈ 𝑆)
frecuzrdgrrn.2	⊢ 𝑅 = frec((𝑥 ∈ (ℤ≥‘𝐶), 𝑦 ∈ 𝑆 ↦ ⟨(𝑥 + 1), (𝑥𝐹𝑦)⟩), ⟨𝐶, 𝐴⟩)
frecuzrdgtcl.3	⊢ (𝜑 → 𝑇 = ran 𝑅)

Assertion

Ref	Expression
frecuzrdg0	⊢ (𝜑 → (𝑇‘𝐶) = 𝐴)

Distinct variable groups:   𝑦,𝐴   𝑥,𝐶,𝑦   𝑦,𝐺   𝑥,𝐹,𝑦   𝑥,𝑆,𝑦   𝜑,𝑥,𝑦

Allowed substitution hints:   𝐴(𝑥)   𝑅(𝑥,𝑦)   𝑇(𝑥,𝑦)   𝐺(𝑥)

Proof of Theorem frecuzrdg0

Step	Hyp	Ref	Expression
1		frec2uz.1	. . . 4 ⊢ (𝜑 → 𝐶 ∈ ℤ)
2		frec2uz.2	. . . 4 ⊢ 𝐺 = frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)
3		frecuzrdgrrn.a	. . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑆)
4		frecuzrdgrrn.f	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (ℤ≥‘𝐶) ∧ 𝑦 ∈ 𝑆)) → (𝑥𝐹𝑦) ∈ 𝑆)
5		frecuzrdgrrn.2	. . . 4 ⊢ 𝑅 = frec((𝑥 ∈ (ℤ≥‘𝐶), 𝑦 ∈ 𝑆 ↦ ⟨(𝑥 + 1), (𝑥𝐹𝑦)⟩), ⟨𝐶, 𝐴⟩)
6		frecuzrdgtcl.3	. . . 4 ⊢ (𝜑 → 𝑇 = ran 𝑅)
7	1, 2, 3, 4, 5, 6	frecuzrdgtcl 10773	. . 3 ⊢ (𝜑 → 𝑇:(ℤ≥‘𝐶)⟶𝑆)
8		ffun 5510	. . 3 ⊢ (𝑇:(ℤ≥‘𝐶)⟶𝑆 → Fun 𝑇)
9	7, 8	syl 14	. 2 ⊢ (𝜑 → Fun 𝑇)
10	5	fveq1i 5670	. . . . 5 ⊢ (𝑅‘∅) = (frec((𝑥 ∈ (ℤ≥‘𝐶), 𝑦 ∈ 𝑆 ↦ ⟨(𝑥 + 1), (𝑥𝐹𝑦)⟩), ⟨𝐶, 𝐴⟩)‘∅)
11		opexg 4343	. . . . . . 7 ⊢ ((𝐶 ∈ ℤ ∧ 𝐴 ∈ 𝑆) → ⟨𝐶, 𝐴⟩ ∈ V)
12	1, 3, 11	syl2anc 411	. . . . . 6 ⊢ (𝜑 → ⟨𝐶, 𝐴⟩ ∈ V)
13		frec0g 6627	. . . . . 6 ⊢ (⟨𝐶, 𝐴⟩ ∈ V → (frec((𝑥 ∈ (ℤ≥‘𝐶), 𝑦 ∈ 𝑆 ↦ ⟨(𝑥 + 1), (𝑥𝐹𝑦)⟩), ⟨𝐶, 𝐴⟩)‘∅) = ⟨𝐶, 𝐴⟩)
14	12, 13	syl 14	. . . . 5 ⊢ (𝜑 → (frec((𝑥 ∈ (ℤ≥‘𝐶), 𝑦 ∈ 𝑆 ↦ ⟨(𝑥 + 1), (𝑥𝐹𝑦)⟩), ⟨𝐶, 𝐴⟩)‘∅) = ⟨𝐶, 𝐴⟩)
15	10, 14	eqtrid 2277	. . . 4 ⊢ (𝜑 → (𝑅‘∅) = ⟨𝐶, 𝐴⟩)
16	1, 2, 3, 4, 5	frecuzrdgrcl 10771	. . . . . 6 ⊢ (𝜑 → 𝑅:ω⟶((ℤ≥‘𝐶) × 𝑆))
17		ffn 5507	. . . . . 6 ⊢ (𝑅:ω⟶((ℤ≥‘𝐶) × 𝑆) → 𝑅 Fn ω)
18	16, 17	syl 14	. . . . 5 ⊢ (𝜑 → 𝑅 Fn ω)
19		peano1 4715	. . . . 5 ⊢ ∅ ∈ ω
20		fnfvelrn 5808	. . . . 5 ⊢ ((𝑅 Fn ω ∧ ∅ ∈ ω) → (𝑅‘∅) ∈ ran 𝑅)
21	18, 19, 20	sylancl 413	. . . 4 ⊢ (𝜑 → (𝑅‘∅) ∈ ran 𝑅)
22	15, 21	eqeltrrd 2310	. . 3 ⊢ (𝜑 → ⟨𝐶, 𝐴⟩ ∈ ran 𝑅)
23	22, 6	eleqtrrd 2312	. 2 ⊢ (𝜑 → ⟨𝐶, 𝐴⟩ ∈ 𝑇)
24		funopfv 5713	. 2 ⊢ (Fun 𝑇 → (⟨𝐶, 𝐴⟩ ∈ 𝑇 → (𝑇‘𝐶) = 𝐴))
25	9, 23, 24	sylc 62	1 ⊢ (𝜑 → (𝑇‘𝐶) = 𝐴)

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1398   ∈ wcel 2203  Vcvv 2812  ∅c0 3507  ⟨cop 3691   ↦ cmpt 4170  ωcom 4711   × cxp 4746  ran crn 4749  Fun wfun 5345   Fn wfn 5346  ⟶wf 5347  ‘cfv 5351  (class class class)co 6049   ∈ cmpo 6051  freccfrec 6620  1c1 8127   + caddc 8129  ℤcz 9576  ℤ_≥cuz 9852

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4224  ax-sep 4227  ax-nul 4235  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-iinf 4709  ax-cnex 8217  ax-resscn 8218  ax-1cn 8219  ax-1re 8220  ax-icn 8221  ax-addcl 8222  ax-addrcl 8223  ax-mulcl 8224  ax-addcom 8226  ax-addass 8228  ax-distr 8230  ax-i2m1 8231  ax-0lt1 8232  ax-0id 8234  ax-rnegex 8235  ax-cnre 8237  ax-pre-ltirr 8238  ax-pre-ltwlin 8239  ax-pre-lttrn 8240  ax-pre-ltadd 8242

This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-iun 3992  df-br 4109  df-opab 4171  df-mpt 4172  df-tr 4208  df-id 4413  df-iord 4486  df-on 4488  df-ilim 4489  df-suc 4491  df-iom 4712  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-fv 5359  df-riota 6002  df-ov 6052  df-oprab 6053  df-mpo 6054  df-1st 6333  df-2nd 6334  df-recs 6535  df-frec 6621  df-pnf 8309  df-mnf 8310  df-xr 8311  df-ltxr 8312  df-le 8313  df-sub 8445  df-neg 8446  df-inn 9237  df-n0 9496  df-z 9577  df-uz 9853

This theorem is referenced by: (None)