Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > ackval41a | Structured version Visualization version GIF version |
Description: The Ackermann function at (4,1). (Contributed by AV, 9-May-2024.) |
Ref | Expression |
---|---|
ackval41a | ⊢ ((Ack‘4)‘1) = ((2↑;16) − 3) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-4 11860 | . . . 4 ⊢ 4 = (3 + 1) | |
2 | 1 | fveq2i 6698 | . . 3 ⊢ (Ack‘4) = (Ack‘(3 + 1)) |
3 | 1e0p1 12300 | . . 3 ⊢ 1 = (0 + 1) | |
4 | 2, 3 | fveq12i 6701 | . 2 ⊢ ((Ack‘4)‘1) = ((Ack‘(3 + 1))‘(0 + 1)) |
5 | 3nn0 12073 | . . . 4 ⊢ 3 ∈ ℕ0 | |
6 | 0nn0 12070 | . . . 4 ⊢ 0 ∈ ℕ0 | |
7 | ackvalsucsucval 45650 | . . . 4 ⊢ ((3 ∈ ℕ0 ∧ 0 ∈ ℕ0) → ((Ack‘(3 + 1))‘(0 + 1)) = ((Ack‘3)‘((Ack‘(3 + 1))‘0))) | |
8 | 5, 6, 7 | mp2an 692 | . . 3 ⊢ ((Ack‘(3 + 1))‘(0 + 1)) = ((Ack‘3)‘((Ack‘(3 + 1))‘0)) |
9 | 3p1e4 11940 | . . . . . . . 8 ⊢ (3 + 1) = 4 | |
10 | 9 | fveq2i 6698 | . . . . . . 7 ⊢ (Ack‘(3 + 1)) = (Ack‘4) |
11 | 10 | fveq1i 6696 | . . . . . 6 ⊢ ((Ack‘(3 + 1))‘0) = ((Ack‘4)‘0) |
12 | ackval40 45655 | . . . . . 6 ⊢ ((Ack‘4)‘0) = ;13 | |
13 | 11, 12 | eqtri 2759 | . . . . 5 ⊢ ((Ack‘(3 + 1))‘0) = ;13 |
14 | 13 | fveq2i 6698 | . . . 4 ⊢ ((Ack‘3)‘((Ack‘(3 + 1))‘0)) = ((Ack‘3)‘;13) |
15 | 1nn0 12071 | . . . . . 6 ⊢ 1 ∈ ℕ0 | |
16 | 15, 5 | deccl 12273 | . . . . 5 ⊢ ;13 ∈ ℕ0 |
17 | oveq1 7198 | . . . . . . . . 9 ⊢ (𝑛 = ;13 → (𝑛 + 3) = (;13 + 3)) | |
18 | 17 | oveq2d 7207 | . . . . . . . 8 ⊢ (𝑛 = ;13 → (2↑(𝑛 + 3)) = (2↑(;13 + 3))) |
19 | 18 | oveq1d 7206 | . . . . . . 7 ⊢ (𝑛 = ;13 → ((2↑(𝑛 + 3)) − 3) = ((2↑(;13 + 3)) − 3)) |
20 | eqid 2736 | . . . . . . . . . 10 ⊢ ;13 = ;13 | |
21 | 3p3e6 11947 | . . . . . . . . . 10 ⊢ (3 + 3) = 6 | |
22 | 15, 5, 5, 20, 21 | decaddi 12318 | . . . . . . . . 9 ⊢ (;13 + 3) = ;16 |
23 | 22 | oveq2i 7202 | . . . . . . . 8 ⊢ (2↑(;13 + 3)) = (2↑;16) |
24 | 23 | oveq1i 7201 | . . . . . . 7 ⊢ ((2↑(;13 + 3)) − 3) = ((2↑;16) − 3) |
25 | 19, 24 | eqtrdi 2787 | . . . . . 6 ⊢ (𝑛 = ;13 → ((2↑(𝑛 + 3)) − 3) = ((2↑;16) − 3)) |
26 | ackval3 45645 | . . . . . 6 ⊢ (Ack‘3) = (𝑛 ∈ ℕ0 ↦ ((2↑(𝑛 + 3)) − 3)) | |
27 | ovex 7224 | . . . . . 6 ⊢ ((2↑;16) − 3) ∈ V | |
28 | 25, 26, 27 | fvmpt 6796 | . . . . 5 ⊢ (;13 ∈ ℕ0 → ((Ack‘3)‘;13) = ((2↑;16) − 3)) |
29 | 16, 28 | ax-mp 5 | . . . 4 ⊢ ((Ack‘3)‘;13) = ((2↑;16) − 3) |
30 | 14, 29 | eqtri 2759 | . . 3 ⊢ ((Ack‘3)‘((Ack‘(3 + 1))‘0)) = ((2↑;16) − 3) |
31 | 8, 30 | eqtri 2759 | . 2 ⊢ ((Ack‘(3 + 1))‘(0 + 1)) = ((2↑;16) − 3) |
32 | 4, 31 | eqtri 2759 | 1 ⊢ ((Ack‘4)‘1) = ((2↑;16) − 3) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1543 ∈ wcel 2112 ‘cfv 6358 (class class class)co 7191 0cc0 10694 1c1 10695 + caddc 10697 − cmin 11027 2c2 11850 3c3 11851 4c4 11852 6c6 11854 ℕ0cn0 12055 ;cdc 12258 ↑cexp 13600 Ackcack 45620 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-rep 5164 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-inf2 9234 ax-cnex 10750 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-mulcom 10758 ax-addass 10759 ax-mulass 10760 ax-distr 10761 ax-i2m1 10762 ax-1ne0 10763 ax-1rid 10764 ax-rnegex 10765 ax-rrecex 10766 ax-cnre 10767 ax-pre-lttri 10768 ax-pre-lttrn 10769 ax-pre-ltadd 10770 ax-pre-mulgt0 10771 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-nel 3037 df-ral 3056 df-rex 3057 df-reu 3058 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-ot 4536 df-uni 4806 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-pred 6140 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7148 df-ov 7194 df-oprab 7195 df-mpo 7196 df-om 7623 df-2nd 7740 df-wrecs 8025 df-recs 8086 df-rdg 8124 df-er 8369 df-en 8605 df-dom 8606 df-sdom 8607 df-pnf 10834 df-mnf 10835 df-xr 10836 df-ltxr 10837 df-le 10838 df-sub 11029 df-neg 11030 df-nn 11796 df-2 11858 df-3 11859 df-4 11860 df-5 11861 df-6 11862 df-7 11863 df-8 11864 df-9 11865 df-n0 12056 df-z 12142 df-dec 12259 df-uz 12404 df-seq 13540 df-exp 13601 df-itco 45621 df-ack 45622 |
This theorem is referenced by: ackval41 45657 ackval42 45658 |
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