Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > ackval2012 | Structured version Visualization version GIF version |
Description: The Ackermann function at (2,0), (2,1), (2,2). (Contributed by AV, 4-May-2024.) |
Ref | Expression |
---|---|
ackval2012 | ⊢ 〈((Ack‘2)‘0), ((Ack‘2)‘1), ((Ack‘2)‘2)〉 = 〈3, 5, 7〉 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ackval2 45980 | . 2 ⊢ (Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) | |
2 | oveq2 7276 | . . . . . 6 ⊢ (𝑛 = 0 → (2 · 𝑛) = (2 · 0)) | |
3 | 2 | oveq1d 7283 | . . . . 5 ⊢ (𝑛 = 0 → ((2 · 𝑛) + 3) = ((2 · 0) + 3)) |
4 | 2t0e0 12125 | . . . . . . 7 ⊢ (2 · 0) = 0 | |
5 | 4 | oveq1i 7278 | . . . . . 6 ⊢ ((2 · 0) + 3) = (0 + 3) |
6 | 3cn 12037 | . . . . . . 7 ⊢ 3 ∈ ℂ | |
7 | 6 | addid2i 11146 | . . . . . 6 ⊢ (0 + 3) = 3 |
8 | 5, 7 | eqtri 2767 | . . . . 5 ⊢ ((2 · 0) + 3) = 3 |
9 | 3, 8 | eqtrdi 2795 | . . . 4 ⊢ (𝑛 = 0 → ((2 · 𝑛) + 3) = 3) |
10 | 0nn0 12231 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
11 | 10 | a1i 11 | . . . 4 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → 0 ∈ ℕ0) |
12 | 3nn0 12234 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
13 | 12 | a1i 11 | . . . 4 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → 3 ∈ ℕ0) |
14 | 1, 9, 11, 13 | fvmptd3 6892 | . . 3 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → ((Ack‘2)‘0) = 3) |
15 | oveq2 7276 | . . . . . 6 ⊢ (𝑛 = 1 → (2 · 𝑛) = (2 · 1)) | |
16 | 15 | oveq1d 7283 | . . . . 5 ⊢ (𝑛 = 1 → ((2 · 𝑛) + 3) = ((2 · 1) + 3)) |
17 | 2t1e2 12119 | . . . . . . 7 ⊢ (2 · 1) = 2 | |
18 | 17 | oveq1i 7278 | . . . . . 6 ⊢ ((2 · 1) + 3) = (2 + 3) |
19 | 2cn 12031 | . . . . . . 7 ⊢ 2 ∈ ℂ | |
20 | 3p2e5 12107 | . . . . . . 7 ⊢ (3 + 2) = 5 | |
21 | 6, 19, 20 | addcomli 11150 | . . . . . 6 ⊢ (2 + 3) = 5 |
22 | 18, 21 | eqtri 2767 | . . . . 5 ⊢ ((2 · 1) + 3) = 5 |
23 | 16, 22 | eqtrdi 2795 | . . . 4 ⊢ (𝑛 = 1 → ((2 · 𝑛) + 3) = 5) |
24 | 1nn0 12232 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
25 | 24 | a1i 11 | . . . 4 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → 1 ∈ ℕ0) |
26 | 5nn0 12236 | . . . . 5 ⊢ 5 ∈ ℕ0 | |
27 | 26 | a1i 11 | . . . 4 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → 5 ∈ ℕ0) |
28 | 1, 23, 25, 27 | fvmptd3 6892 | . . 3 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → ((Ack‘2)‘1) = 5) |
29 | oveq2 7276 | . . . . . 6 ⊢ (𝑛 = 2 → (2 · 𝑛) = (2 · 2)) | |
30 | 29 | oveq1d 7283 | . . . . 5 ⊢ (𝑛 = 2 → ((2 · 𝑛) + 3) = ((2 · 2) + 3)) |
31 | 2t2e4 12120 | . . . . . . 7 ⊢ (2 · 2) = 4 | |
32 | 31 | oveq1i 7278 | . . . . . 6 ⊢ ((2 · 2) + 3) = (4 + 3) |
33 | 4p3e7 12110 | . . . . . 6 ⊢ (4 + 3) = 7 | |
34 | 32, 33 | eqtri 2767 | . . . . 5 ⊢ ((2 · 2) + 3) = 7 |
35 | 30, 34 | eqtrdi 2795 | . . . 4 ⊢ (𝑛 = 2 → ((2 · 𝑛) + 3) = 7) |
36 | 2nn0 12233 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
37 | 36 | a1i 11 | . . . 4 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → 2 ∈ ℕ0) |
38 | 7nn0 12238 | . . . . 5 ⊢ 7 ∈ ℕ0 | |
39 | 38 | a1i 11 | . . . 4 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → 7 ∈ ℕ0) |
40 | 1, 35, 37, 39 | fvmptd3 6892 | . . 3 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → ((Ack‘2)‘2) = 7) |
41 | 14, 28, 40 | oteq123d 4824 | . 2 ⊢ ((Ack‘2) = (𝑛 ∈ ℕ0 ↦ ((2 · 𝑛) + 3)) → 〈((Ack‘2)‘0), ((Ack‘2)‘1), ((Ack‘2)‘2)〉 = 〈3, 5, 7〉) |
42 | 1, 41 | ax-mp 5 | 1 ⊢ 〈((Ack‘2)‘0), ((Ack‘2)‘1), ((Ack‘2)‘2)〉 = 〈3, 5, 7〉 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1541 ∈ wcel 2109 〈cotp 4574 ↦ cmpt 5161 ‘cfv 6430 (class class class)co 7268 0cc0 10855 1c1 10856 + caddc 10858 · cmul 10860 2c2 12011 3c3 12012 4c4 12013 5c5 12014 7c7 12016 ℕ0cn0 12216 Ackcack 45956 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-inf2 9360 ax-cnex 10911 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-ot 4575 df-uni 4845 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-lim 6268 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7701 df-2nd 7818 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-rdg 8225 df-er 8472 df-en 8708 df-dom 8709 df-sdom 8710 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-nn 11957 df-2 12019 df-3 12020 df-4 12021 df-5 12022 df-6 12023 df-7 12024 df-n0 12217 df-z 12303 df-uz 12565 df-seq 13703 df-itco 45957 df-ack 45958 |
This theorem is referenced by: (None) |
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