| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: Initial value of a recursive definition generator on an upper partition of ℤ. See comment in uzrdgval 4657. |
| Ref | Expression |
|---|---|
| om2uz.1 | ⊢ C ∈ ℤ |
| om2uz.2 | ⊢ G = (rec({〈x, y〉∣y = (x + 1)}, C) ↾ ω) |
| Ref | Expression |
|---|---|
| uzrdgini | ⊢ (A ∈ B → ((rec(F, A) ∘ ◡G) ‘C) = A) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rdgzert 2982 | . 2 ⊢ (A ∈ B → (rec(F, A) ‘∅) = A) | |
| 2 | om2uz.1 | . . . . . 6 ⊢ C ∈ ℤ | |
| 3 | zret 4567 | . . . . . . . 8 ⊢ (C ∈ ℤ → C ∈ ℝ) | |
| 4 | 2, 3 | ax-mp 6 | . . . . . . 7 ⊢ C ∈ ℝ |
| 5 | 4 | leid 4339 | . . . . . 6 ⊢ C ≤ C |
| 6 | 2, 5 | pm3.2i 234 | . . . . 5 ⊢ (C ∈ ℤ ∧ C ≤ C) |
| 7 | breq2 2066 | . . . . . 6 ⊢ (z = C → (C ≤ z ↔ C ≤ C)) | |
| 8 | 7 | elrab 1422 | . . . . 5 ⊢ (C ∈ {z ∈ ℤ∣C ≤ z} ↔ (C ∈ ℤ ∧ C ≤ C)) |
| 9 | 6, 8 | mpbir 165 | . . . 4 ⊢ C ∈ {z ∈ ℤ∣C ≤ z} |
| 10 | om2uz.2 | . . . . 5 ⊢ G = (rec({〈x, y〉∣y = (x + 1)}, C) ↾ ω) | |
| 11 | 2, 10 | uzrdgval 4657 | . . . 4 ⊢ (C ∈ {z ∈ ℤ∣C ≤ z} → ((rec(F, A) ∘ ◡G) ‘C) = (rec(F, A) ‘(◡G ‘C))) |
| 12 | 9, 11 | ax-mp 6 | . . 3 ⊢ ((rec(F, A) ∘ ◡G) ‘C) = (rec(F, A) ‘(◡G ‘C)) |
| 13 | 2, 10 | om2uz0 4651 | . . . . 5 ⊢ (G ‘∅) = C |
| 14 | 2, 10 | om2uzf1o 4656 | . . . . . 6 ⊢ G:ω–1-1-onto→{z ∈ ℤ∣C ≤ z} |
| 15 | peano1 2390 | . . . . . 6 ⊢ ∅ ∈ ω | |
| 16 | f1ocnvfv 2921 | . . . . . 6 ⊢ ((G:ω–1-1-onto→{z ∈ ℤ∣C ≤ z} ∧ ∅ ∈ ω) → ((G ‘∅) = C → (◡G ‘C) = ∅)) | |
| 17 | 14, 15, 16 | mp2an 520 | . . . . 5 ⊢ ((G ‘∅) = C → (◡G ‘C) = ∅) |
| 18 | 13, 17 | ax-mp 6 | . . . 4 ⊢ (◡G ‘C) = ∅ |
| 19 | 18 | fveq2i 2835 | . . 3 ⊢ (rec(F, A) ‘(◡G ‘C)) = (rec(F, A) ‘∅) |
| 20 | 12, 19 | eqtr 1119 | . 2 ⊢ ((rec(F, A) ∘ ◡G) ‘C) = (rec(F, A) ‘∅) |
| 21 | 1, 20 | syl5eq 1136 | 1 ⊢ (A ∈ B → ((rec(F, A) ∘ ◡G) ‘C) = A) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 = wceq 1091 ∈ wcel 1092 {crab 1204 ∅c0 1707 class class class wbr 2054 {copab 2055 ωcom 2372 ◡ccnv 2409 ↾ cres 2412 ∘ ccom 2414 –1-1-onto→wf1o 2421 ‘cfv 2422 reccrdg 2969 (class class class)co 3001 ℝcr 4027 1c1 4029 + caddc 4031 ≤ cle 4092 ℤcz 4095 |
| This theorem is referenced by: seqlem1 4662 seq1lem 4668 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 ax-reg 1078 ax-inf 1079 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3or 582 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-ne 1192 df-ral 1205 df-rex 1206 df-reu 1207 df-rab 1208 df-v 1349 df-sbc 1441 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-pss 1494 df-nul 1708 df-if 1777 df-pw 1799 df-sn 1811 df-pr 1812 df-tp 1814 df-op 1815 df-uni 1920 df-int 1966 df-iun 1996 df-tr 2042 df-br 2063 df-opab 2098 df-eprel 2122 df-id 2125 df-po 2128 df-so 2138 df-fr 2169 df-we 2186 df-ord 2202 df-on 2203 df-lim 2204 df-suc 2205 df-om 2373 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-f 2434 df-f1 2435 df-fo 2436 df-f1o 2437 df-fv 2438 df-rdg 2970 df-opr 3003 df-oprab 3004 df-1o 3104 df-oadd 3106 df-omul 3107 df-er 3200 df-ec 3202 df-qs 3205 df-ni 3794 df-pli 3795 df-mi 3796 df-lti 3797 df-plpq 3829 df-mpq 3830 df-enq 3831 df-nq 3832 df-plq 3833 df-mq 3834 df-rq 3835 df-ltq 3836 df-1q 3837 df-np 3880 df-1p 3881 df-plp 3882 df-mp 3883 df-ltp 3884 df-plpr 3958 df-mpr 3959 df-enr 3960 df-nr 3961 df-plr 3962 df-mr 3963 df-ltr 3964 df-0r 3965 df-1r 3966 df-m1r 3967 df-c 4034 df-0 4035 df-1 4036 df-r 4038 df-plus 4039 df-mul 4040 df-lt 4041 df-sub 4133 df-neg 4135 df-le 4277 df-n 4423 df-n0 4535 df-z 4564 |