![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > expn1 | Structured version Visualization version GIF version |
Description: A complex number raised to the negative one power is its reciprocal. When 𝐴 = 0, both sides have the "value" (1 / 0); relying on that should be avoid in applications. (Contributed by Mario Carneiro, 4-Jun-2014.) |
Ref | Expression |
---|---|
expn1 | ⊢ (𝐴 ∈ ℂ → (𝐴↑-1) = (1 / 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1nn0 12465 | . . 3 ⊢ 1 ∈ ℕ0 | |
2 | expneg 14012 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℕ0) → (𝐴↑-1) = (1 / (𝐴↑1))) | |
3 | 1, 2 | mpan2 689 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴↑-1) = (1 / (𝐴↑1))) |
4 | exp1 14010 | . . 3 ⊢ (𝐴 ∈ ℂ → (𝐴↑1) = 𝐴) | |
5 | 4 | oveq2d 7404 | . 2 ⊢ (𝐴 ∈ ℂ → (1 / (𝐴↑1)) = (1 / 𝐴)) |
6 | 3, 5 | eqtrd 2771 | 1 ⊢ (𝐴 ∈ ℂ → (𝐴↑-1) = (1 / 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2106 (class class class)co 7388 ℂcc 11085 1c1 11088 -cneg 11422 / cdiv 11848 ℕ0cn0 12449 ↑cexp 14004 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2702 ax-sep 5287 ax-nul 5294 ax-pow 5351 ax-pr 5415 ax-un 7703 ax-cnex 11143 ax-resscn 11144 ax-1cn 11145 ax-icn 11146 ax-addcl 11147 ax-addrcl 11148 ax-mulcl 11149 ax-mulrcl 11150 ax-mulcom 11151 ax-addass 11152 ax-mulass 11153 ax-distr 11154 ax-i2m1 11155 ax-1ne0 11156 ax-1rid 11157 ax-rnegex 11158 ax-rrecex 11159 ax-cnre 11160 ax-pre-lttri 11161 ax-pre-lttrn 11162 ax-pre-ltadd 11163 ax-pre-mulgt0 11164 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3374 df-reu 3375 df-rab 3429 df-v 3471 df-sbc 3769 df-csb 3885 df-dif 3942 df-un 3944 df-in 3946 df-ss 3956 df-pss 3958 df-nul 4314 df-if 4518 df-pw 4593 df-sn 4618 df-pr 4620 df-op 4624 df-uni 4897 df-iun 4987 df-br 5137 df-opab 5199 df-mpt 5220 df-tr 5254 df-id 5562 df-eprel 5568 df-po 5576 df-so 5577 df-fr 5619 df-we 5621 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-ima 5677 df-pred 6284 df-ord 6351 df-on 6352 df-lim 6353 df-suc 6354 df-iota 6479 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-riota 7344 df-ov 7391 df-oprab 7392 df-mpo 7393 df-om 7834 df-2nd 7953 df-frecs 8243 df-wrecs 8274 df-recs 8348 df-rdg 8387 df-er 8681 df-en 8918 df-dom 8919 df-sdom 8920 df-pnf 11227 df-mnf 11228 df-xr 11229 df-ltxr 11230 df-le 11231 df-sub 11423 df-neg 11424 df-div 11849 df-nn 12190 df-n0 12450 df-z 12536 df-uz 12800 df-seq 13944 df-exp 14005 |
This theorem is referenced by: plyeq0lem 25646 aaliou3lem2 25778 dignn0flhalflem1 46886 |
Copyright terms: Public domain | W3C validator |