abscxp - Intuitionistic Logic Explorer

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Theorem abscxp 16000

Description: Absolute value of a power, when the base is real. (Contributed by Mario Carneiro, 15-Sep-2014.)

**Assertion**
Ref	Expression
abscxp	⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (abs‘(𝐴↑_𝑐𝐵)) = (𝐴↑_𝑐(ℜ‘𝐵)))

**Proof of Theorem abscxp**
Step	Hyp	Ref	Expression
1		simpr 110	. . . . 5 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → 𝐵 ∈ ℂ)
2		relogcl 15946	. . . . . . 7 ⊢ (𝐴 ∈ ℝ⁺ → (log‘𝐴) ∈ ℝ)
3	2	recnd 8348	. . . . . 6 ⊢ (𝐴 ∈ ℝ⁺ → (log‘𝐴) ∈ ℂ)
4	3	adantr 276	. . . . 5 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (log‘𝐴) ∈ ℂ)
5	1, 4	mulcld 8340	. . . 4 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (𝐵 · (log‘𝐴)) ∈ ℂ)
6		absef 12520	. . . 4 ⊢ ((𝐵 · (log‘𝐴)) ∈ ℂ → (abs‘(exp‘(𝐵 · (log‘𝐴)))) = (exp‘(ℜ‘(𝐵 · (log‘𝐴)))))
7	5, 6	syl 14	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (abs‘(exp‘(𝐵 · (log‘𝐴)))) = (exp‘(ℜ‘(𝐵 · (log‘𝐴)))))
8		remul2 11621	. . . . . 6 ⊢ (((log‘𝐴) ∈ ℝ ∧ 𝐵 ∈ ℂ) → (ℜ‘((log‘𝐴) · 𝐵)) = ((log‘𝐴) · (ℜ‘𝐵)))
9	2, 8	sylan 283	. . . . 5 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (ℜ‘((log‘𝐴) · 𝐵)) = ((log‘𝐴) · (ℜ‘𝐵)))
10	1, 4	mulcomd 8341	. . . . . 6 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (𝐵 · (log‘𝐴)) = ((log‘𝐴) · 𝐵))
11	10	fveq2d 5697	. . . . 5 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (ℜ‘(𝐵 · (log‘𝐴))) = (ℜ‘((log‘𝐴) · 𝐵)))
12		recl 11601	. . . . . . . 8 ⊢ (𝐵 ∈ ℂ → (ℜ‘𝐵) ∈ ℝ)
13	12	adantl 277	. . . . . . 7 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (ℜ‘𝐵) ∈ ℝ)
14	13	recnd 8348	. . . . . 6 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (ℜ‘𝐵) ∈ ℂ)
15	14, 4	mulcomd 8341	. . . . 5 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → ((ℜ‘𝐵) · (log‘𝐴)) = ((log‘𝐴) · (ℜ‘𝐵)))
16	9, 11, 15	3eqtr4d 2281	. . . 4 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (ℜ‘(𝐵 · (log‘𝐴))) = ((ℜ‘𝐵) · (log‘𝐴)))
17	16	fveq2d 5697	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (exp‘(ℜ‘(𝐵 · (log‘𝐴)))) = (exp‘((ℜ‘𝐵) · (log‘𝐴))))
18	7, 17	eqtrd 2271	. 2 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (abs‘(exp‘(𝐵 · (log‘𝐴)))) = (exp‘((ℜ‘𝐵) · (log‘𝐴))))
19		rpcxpef 15979	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (𝐴↑_𝑐𝐵) = (exp‘(𝐵 · (log‘𝐴))))
20	19	fveq2d 5697	. 2 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (abs‘(𝐴↑_𝑐𝐵)) = (abs‘(exp‘(𝐵 · (log‘𝐴)))))
21		rpcxpef 15979	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ (ℜ‘𝐵) ∈ ℂ) → (𝐴↑_𝑐(ℜ‘𝐵)) = (exp‘((ℜ‘𝐵) · (log‘𝐴))))
22	14, 21	syldan 282	. 2 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (𝐴↑_𝑐(ℜ‘𝐵)) = (exp‘((ℜ‘𝐵) · (log‘𝐴))))
23	18, 20, 22	3eqtr4d 2281	1 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (abs‘(𝐴↑_𝑐𝐵)) = (𝐴↑_𝑐(ℜ‘𝐵)))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 = wceq 1402 ∈ wcel 2209 ‘cfv 5375 (class class class)co 6079 ℂcc 8171 ℝcr 8172 · cmul 8178 ℝ⁺crp 10037 ℜcre 11588 abscabs 11746 expce 12392 logclog 15940 ↑_𝑐ccxp 15941

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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-iinf 4733 ax-cnex 8264 ax-resscn 8265 ax-1cn 8266 ax-1re 8267 ax-icn 8268 ax-addcl 8269 ax-addrcl 8270 ax-mulcl 8271 ax-mulrcl 8272 ax-addcom 8273 ax-mulcom 8274 ax-addass 8275 ax-mulass 8276 ax-distr 8277 ax-i2m1 8278 ax-0lt1 8279 ax-1rid 8280 ax-0id 8281 ax-rnegex 8282 ax-precex 8283 ax-cnre 8284 ax-pre-ltirr 8285 ax-pre-ltwlin 8286 ax-pre-lttrn 8287 ax-pre-apti 8288 ax-pre-ltadd 8289 ax-pre-mulgt0 8290 ax-pre-mulext 8291 ax-arch 8292 ax-caucvg 8293 ax-pre-suploc 8294 ax-addf 8295 ax-mulf 8296

This theorem depends on definitions: df-bi 117 df-stab 843 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-iun 4012 df-disj 4105 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-id 4436 df-po 4439 df-iso 4440 df-iord 4509 df-on 4511 df-ilim 4512 df-suc 4514 df-iom 4736 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-isom 5384 df-riota 6032 df-ov 6082 df-oprab 6083 df-mpo 6084 df-of 6296 df-1st 6368 df-2nd 6369 df-recs 6570 df-irdg 6635 df-frec 6656 df-1o 6681 df-oadd 6685 df-er 6801 df-map 6918 df-pm 6919 df-en 7017 df-dom 7018 df-fin 7019 df-sup 7318 df-inf 7319 df-pnf 8356 df-mnf 8357 df-xr 8358 df-ltxr 8359 df-le 8360 df-sub 8493 df-neg 8494 df-reap 8897 df-ap 8904 df-div 8997 df-inn 9288 df-2 9346 df-3 9347 df-4 9348 df-n0 9547 df-z 9628 df-uz 9905 df-q 10003 df-rp 10038 df-xneg 10157 df-xadd 10158 df-ioo 10277 df-ico 10279 df-icc 10280 df-fz 10395 df-fzo 10533 df-seqfrec 10868 df-exp 10959 df-fac 11147 df-bc 11169 df-ihash 11198 df-shft 11563 df-cj 11590 df-re 11591 df-im 11592 df-rsqrt 11747 df-abs 11748 df-clim 12028 df-sumdc 12103 df-ef 12398 df-e 12399 df-sin 12400 df-cos 12401 df-rest 13578 df-topgen 13597 df-psmet 14863 df-xmet 14864 df-met 14865 df-bl 14866 df-mopn 14867 df-top 15082 df-topon 15095 df-bases 15127 df-ntr 15180 df-cn 15272 df-cnp 15273 df-tx 15337 df-cncf 15655 df-limced 15740 df-dvap 15741 df-relog 15942 df-rpcxp 15943

This theorem is referenced by: (None)

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