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Mirrors > Home > MPE Home > Th. List > i4 | Structured version Visualization version GIF version |
Description: i to the fourth power. (Contributed by NM, 31-Jan-2007.) |
Ref | Expression |
---|---|
i4 | ⊢ (i↑4) = 1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-icn 10785 | . . 3 ⊢ i ∈ ℂ | |
2 | 2nn0 12104 | . . 3 ⊢ 2 ∈ ℕ0 | |
3 | expadd 13674 | . . 3 ⊢ ((i ∈ ℂ ∧ 2 ∈ ℕ0 ∧ 2 ∈ ℕ0) → (i↑(2 + 2)) = ((i↑2) · (i↑2))) | |
4 | 1, 2, 2, 3 | mp3an 1463 | . 2 ⊢ (i↑(2 + 2)) = ((i↑2) · (i↑2)) |
5 | 2p2e4 11962 | . . 3 ⊢ (2 + 2) = 4 | |
6 | 5 | oveq2i 7221 | . 2 ⊢ (i↑(2 + 2)) = (i↑4) |
7 | i2 13768 | . . . 4 ⊢ (i↑2) = -1 | |
8 | 7, 7 | oveq12i 7222 | . . 3 ⊢ ((i↑2) · (i↑2)) = (-1 · -1) |
9 | ax-1cn 10784 | . . . 4 ⊢ 1 ∈ ℂ | |
10 | 9, 9 | mul2negi 11277 | . . 3 ⊢ (-1 · -1) = (1 · 1) |
11 | 1t1e1 11989 | . . 3 ⊢ (1 · 1) = 1 | |
12 | 8, 10, 11 | 3eqtri 2769 | . 2 ⊢ ((i↑2) · (i↑2)) = 1 |
13 | 4, 6, 12 | 3eqtr3i 2773 | 1 ⊢ (i↑4) = 1 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1543 ∈ wcel 2110 (class class class)co 7210 ℂcc 10724 1c1 10727 ici 10728 + caddc 10729 · cmul 10731 -cneg 11060 2c2 11882 4c4 11884 ℕ0cn0 12087 ↑cexp 13632 |
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 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-sep 5189 ax-nul 5196 ax-pow 5255 ax-pr 5319 ax-un 7520 ax-cnex 10782 ax-resscn 10783 ax-1cn 10784 ax-icn 10785 ax-addcl 10786 ax-addrcl 10787 ax-mulcl 10788 ax-mulrcl 10789 ax-mulcom 10790 ax-addass 10791 ax-mulass 10792 ax-distr 10793 ax-i2m1 10794 ax-1ne0 10795 ax-1rid 10796 ax-rnegex 10797 ax-rrecex 10798 ax-cnre 10799 ax-pre-lttri 10800 ax-pre-lttrn 10801 ax-pre-ltadd 10802 ax-pre-mulgt0 10803 |
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 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2940 df-nel 3044 df-ral 3063 df-rex 3064 df-reu 3065 df-rab 3067 df-v 3407 df-sbc 3692 df-csb 3809 df-dif 3866 df-un 3868 df-in 3870 df-ss 3880 df-pss 3882 df-nul 4235 df-if 4437 df-pw 4512 df-sn 4539 df-pr 4541 df-tp 4543 df-op 4545 df-uni 4817 df-iun 4903 df-br 5051 df-opab 5113 df-mpt 5133 df-tr 5159 df-id 5452 df-eprel 5457 df-po 5465 df-so 5466 df-fr 5506 df-we 5508 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6157 df-ord 6213 df-on 6214 df-lim 6215 df-suc 6216 df-iota 6335 df-fun 6379 df-fn 6380 df-f 6381 df-f1 6382 df-fo 6383 df-f1o 6384 df-fv 6385 df-riota 7167 df-ov 7213 df-oprab 7214 df-mpo 7215 df-om 7642 df-2nd 7759 df-wrecs 8044 df-recs 8105 df-rdg 8143 df-er 8388 df-en 8624 df-dom 8625 df-sdom 8626 df-pnf 10866 df-mnf 10867 df-xr 10868 df-ltxr 10869 df-le 10870 df-sub 11061 df-neg 11062 df-nn 11828 df-2 11890 df-3 11891 df-4 11892 df-n0 12088 df-z 12174 df-uz 12436 df-seq 13572 df-exp 13633 |
This theorem is referenced by: iexpcyc 13772 cphipval 24137 ipval2 28785 |
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