| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > frec2uzzd | GIF version | ||
| Description: The value of 𝐺 (see frec2uz0d 10557) is an integer. (Contributed by Jim Kingdon, 16-May-2020.) |
| Ref | Expression |
|---|---|
| frec2uz.1 | ⊢ (𝜑 → 𝐶 ∈ ℤ) |
| frec2uz.2 | ⊢ 𝐺 = frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶) |
| frec2uzzd.a | ⊢ (𝜑 → 𝐴 ∈ ω) |
| Ref | Expression |
|---|---|
| frec2uzzd | ⊢ (𝜑 → (𝐺‘𝐴) ∈ ℤ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | frec2uz.2 | . . 3 ⊢ 𝐺 = frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶) | |
| 2 | 1 | fveq1i 5587 | . 2 ⊢ (𝐺‘𝐴) = (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘𝐴) |
| 3 | frec2uz.1 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℤ) | |
| 4 | simpr 110 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℤ) | |
| 5 | 4 | peano2zd 9511 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → (𝑘 + 1) ∈ ℤ) |
| 6 | oveq1 5961 | . . . . . 6 ⊢ (𝑥 = 𝑘 → (𝑥 + 1) = (𝑘 + 1)) | |
| 7 | eqid 2206 | . . . . . 6 ⊢ (𝑥 ∈ ℤ ↦ (𝑥 + 1)) = (𝑥 ∈ ℤ ↦ (𝑥 + 1)) | |
| 8 | 6, 7 | fvmptg 5665 | . . . . 5 ⊢ ((𝑘 ∈ ℤ ∧ (𝑘 + 1) ∈ ℤ) → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑘) = (𝑘 + 1)) |
| 9 | 4, 5, 8 | syl2anc 411 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑘) = (𝑘 + 1)) |
| 10 | 9, 5 | eqeltrd 2283 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑘) ∈ ℤ) |
| 11 | frec2uzzd.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ω) | |
| 12 | 3, 10, 11 | freccl 6499 | . 2 ⊢ (𝜑 → (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘𝐴) ∈ ℤ) |
| 13 | 2, 12 | eqeltrid 2293 | 1 ⊢ (𝜑 → (𝐺‘𝐴) ∈ ℤ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1373 ∈ wcel 2177 ↦ cmpt 4110 ωcom 4643 ‘cfv 5277 (class class class)co 5954 freccfrec 6486 1c1 7939 + caddc 7941 ℤcz 9385 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-coll 4164 ax-sep 4167 ax-nul 4175 ax-pow 4223 ax-pr 4258 ax-un 4485 ax-setind 4590 ax-iinf 4641 ax-cnex 8029 ax-resscn 8030 ax-1cn 8031 ax-1re 8032 ax-icn 8033 ax-addcl 8034 ax-addrcl 8035 ax-mulcl 8036 ax-addcom 8038 ax-addass 8040 ax-distr 8042 ax-i2m1 8043 ax-0id 8046 ax-rnegex 8047 ax-cnre 8049 |
| This theorem depends on definitions: df-bi 117 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-ral 2490 df-rex 2491 df-reu 2492 df-rab 2494 df-v 2775 df-sbc 3001 df-csb 3096 df-dif 3170 df-un 3172 df-in 3174 df-ss 3181 df-nul 3463 df-pw 3620 df-sn 3641 df-pr 3642 df-op 3644 df-uni 3854 df-int 3889 df-iun 3932 df-br 4049 df-opab 4111 df-mpt 4112 df-tr 4148 df-id 4345 df-iord 4418 df-on 4420 df-ilim 4421 df-suc 4423 df-iom 4644 df-xp 4686 df-rel 4687 df-cnv 4688 df-co 4689 df-dm 4690 df-rn 4691 df-res 4692 df-ima 4693 df-iota 5238 df-fun 5279 df-fn 5280 df-f 5281 df-f1 5282 df-fo 5283 df-f1o 5284 df-fv 5285 df-riota 5909 df-ov 5957 df-oprab 5958 df-mpo 5959 df-recs 6401 df-frec 6487 df-sub 8258 df-neg 8259 df-inn 9050 df-n0 9309 df-z 9386 |
| This theorem is referenced by: frec2uzsucd 10559 frec2uzltd 10561 frec2uzlt2d 10562 frec2uzf1od 10564 frec2uzrdg 10567 frec2uzled 10587 |
| Copyright terms: Public domain | W3C validator |