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Mirrors > Home > ILE Home > Th. List > frec2uzzd | GIF version |
Description: The value of 𝐺 (see frec2uz0d 10470) 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 5555 | . 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 9442 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → (𝑘 + 1) ∈ ℤ) |
6 | oveq1 5925 | . . . . . 6 ⊢ (𝑥 = 𝑘 → (𝑥 + 1) = (𝑘 + 1)) | |
7 | eqid 2193 | . . . . . 6 ⊢ (𝑥 ∈ ℤ ↦ (𝑥 + 1)) = (𝑥 ∈ ℤ ↦ (𝑥 + 1)) | |
8 | 6, 7 | fvmptg 5633 | . . . . 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 2270 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑘) ∈ ℤ) |
11 | frec2uzzd.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ω) | |
12 | 3, 10, 11 | freccl 6456 | . 2 ⊢ (𝜑 → (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘𝐴) ∈ ℤ) |
13 | 2, 12 | eqeltrid 2280 | 1 ⊢ (𝜑 → (𝐺‘𝐴) ∈ ℤ) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 = wceq 1364 ∈ wcel 2164 ↦ cmpt 4090 ωcom 4622 ‘cfv 5254 (class class class)co 5918 freccfrec 6443 1c1 7873 + caddc 7875 ℤcz 9317 |
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 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-coll 4144 ax-sep 4147 ax-nul 4155 ax-pow 4203 ax-pr 4238 ax-un 4464 ax-setind 4569 ax-iinf 4620 ax-cnex 7963 ax-resscn 7964 ax-1cn 7965 ax-1re 7966 ax-icn 7967 ax-addcl 7968 ax-addrcl 7969 ax-mulcl 7970 ax-addcom 7972 ax-addass 7974 ax-distr 7976 ax-i2m1 7977 ax-0id 7980 ax-rnegex 7981 ax-cnre 7983 |
This theorem depends on definitions: df-bi 117 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-ral 2477 df-rex 2478 df-reu 2479 df-rab 2481 df-v 2762 df-sbc 2986 df-csb 3081 df-dif 3155 df-un 3157 df-in 3159 df-ss 3166 df-nul 3447 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-int 3871 df-iun 3914 df-br 4030 df-opab 4091 df-mpt 4092 df-tr 4128 df-id 4324 df-iord 4397 df-on 4399 df-ilim 4400 df-suc 4402 df-iom 4623 df-xp 4665 df-rel 4666 df-cnv 4667 df-co 4668 df-dm 4669 df-rn 4670 df-res 4671 df-ima 4672 df-iota 5215 df-fun 5256 df-fn 5257 df-f 5258 df-f1 5259 df-fo 5260 df-f1o 5261 df-fv 5262 df-riota 5873 df-ov 5921 df-oprab 5922 df-mpo 5923 df-recs 6358 df-frec 6444 df-sub 8192 df-neg 8193 df-inn 8983 df-n0 9241 df-z 9318 |
This theorem is referenced by: frec2uzsucd 10472 frec2uzltd 10474 frec2uzlt2d 10475 frec2uzf1od 10477 frec2uzrdg 10480 frec2uzled 10500 |
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