rpcxpadd - Intuitionistic Logic Explorer

	Intuitionistic Logic Explorer		< Previous Next > Nearby theorems
Mirrors > Home > ILE Home > Th. List > rpcxpadd		GIF version

Theorem rpcxpadd 15757

Description: Sum of exponents law for complex exponentiation. (Contributed by Mario Carneiro, 2-Aug-2014.) (Revised by Jim Kingdon, 13-Jun-2024.)

**Assertion**
Ref	Expression
rpcxpadd	⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴↑_𝑐(𝐵 + 𝐶)) = ((𝐴↑_𝑐𝐵) · (𝐴↑_𝑐𝐶)))

**Proof of Theorem rpcxpadd**
Step	Hyp	Ref	Expression
1		simp2 1025	. . . . 5 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → 𝐵 ∈ ℂ)
2		simp3 1026	. . . . 5 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → 𝐶 ∈ ℂ)
3		relogcl 15714	. . . . . . 7 ⊢ (𝐴 ∈ ℝ⁺ → (log‘𝐴) ∈ ℝ)
4	3	3ad2ant1 1045	. . . . . 6 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (log‘𝐴) ∈ ℝ)
5	4	recnd 8298	. . . . 5 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (log‘𝐴) ∈ ℂ)
6	1, 2, 5	adddird 8295	. . . 4 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐵 + 𝐶) · (log‘𝐴)) = ((𝐵 · (log‘𝐴)) + (𝐶 · (log‘𝐴))))
7	6	fveq2d 5673	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (exp‘((𝐵 + 𝐶) · (log‘𝐴))) = (exp‘((𝐵 · (log‘𝐴)) + (𝐶 · (log‘𝐴)))))
8	1, 5	mulcld 8290	. . . 4 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐵 · (log‘𝐴)) ∈ ℂ)
9	2, 5	mulcld 8290	. . . 4 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐶 · (log‘𝐴)) ∈ ℂ)
10		efadd 12354	. . . 4 ⊢ (((𝐵 · (log‘𝐴)) ∈ ℂ ∧ (𝐶 · (log‘𝐴)) ∈ ℂ) → (exp‘((𝐵 · (log‘𝐴)) + (𝐶 · (log‘𝐴)))) = ((exp‘(𝐵 · (log‘𝐴))) · (exp‘(𝐶 · (log‘𝐴)))))
11	8, 9, 10	syl2anc 411	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (exp‘((𝐵 · (log‘𝐴)) + (𝐶 · (log‘𝐴)))) = ((exp‘(𝐵 · (log‘𝐴))) · (exp‘(𝐶 · (log‘𝐴)))))
12	7, 11	eqtrd 2265	. 2 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (exp‘((𝐵 + 𝐶) · (log‘𝐴))) = ((exp‘(𝐵 · (log‘𝐴))) · (exp‘(𝐶 · (log‘𝐴)))))
13		simp1 1024	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → 𝐴 ∈ ℝ⁺)
14	1, 2	addcld 8289	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐵 + 𝐶) ∈ ℂ)
15		rpcxpef 15746	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ (𝐵 + 𝐶) ∈ ℂ) → (𝐴↑_𝑐(𝐵 + 𝐶)) = (exp‘((𝐵 + 𝐶) · (log‘𝐴))))
16	13, 14, 15	syl2anc 411	. 2 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴↑_𝑐(𝐵 + 𝐶)) = (exp‘((𝐵 + 𝐶) · (log‘𝐴))))
17		rpcxpef 15746	. . . 4 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ) → (𝐴↑_𝑐𝐵) = (exp‘(𝐵 · (log‘𝐴))))
18	13, 1, 17	syl2anc 411	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴↑_𝑐𝐵) = (exp‘(𝐵 · (log‘𝐴))))
19		rpcxpef 15746	. . . 4 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐶 ∈ ℂ) → (𝐴↑_𝑐𝐶) = (exp‘(𝐶 · (log‘𝐴))))
20	13, 2, 19	syl2anc 411	. . 3 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴↑_𝑐𝐶) = (exp‘(𝐶 · (log‘𝐴))))
21	18, 20	oveq12d 6067	. 2 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴↑_𝑐𝐵) · (𝐴↑_𝑐𝐶)) = ((exp‘(𝐵 · (log‘𝐴))) · (exp‘(𝐶 · (log‘𝐴)))))
22	12, 16, 21	3eqtr4d 2275	1 ⊢ ((𝐴 ∈ ℝ⁺ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴↑_𝑐(𝐵 + 𝐶)) = ((𝐴↑_𝑐𝐵) · (𝐴↑_𝑐𝐶)))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ w3a 1005 = wceq 1398 ∈ wcel 2203 ‘cfv 5351 (class class class)co 6049 ℂcc 8121 ℝcr 8122 + caddc 8126 · cmul 8128 ℝ⁺crp 9982 expce 12321 logclog 15708 ↑_𝑐ccxp 15709

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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-coll 4224 ax-sep 4227 ax-nul 4235 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-iinf 4709 ax-cnex 8214 ax-resscn 8215 ax-1cn 8216 ax-1re 8217 ax-icn 8218 ax-addcl 8219 ax-addrcl 8220 ax-mulcl 8221 ax-mulrcl 8222 ax-addcom 8223 ax-mulcom 8224 ax-addass 8225 ax-mulass 8226 ax-distr 8227 ax-i2m1 8228 ax-0lt1 8229 ax-1rid 8230 ax-0id 8231 ax-rnegex 8232 ax-precex 8233 ax-cnre 8234 ax-pre-ltirr 8235 ax-pre-ltwlin 8236 ax-pre-lttrn 8237 ax-pre-apti 8238 ax-pre-ltadd 8239 ax-pre-mulgt0 8240 ax-pre-mulext 8241 ax-arch 8242 ax-caucvg 8243 ax-pre-suploc 8244 ax-addf 8245 ax-mulf 8246

This theorem depends on definitions: df-bi 117 df-stab 839 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-reu 2527 df-rmo 2528 df-rab 2529 df-v 2814 df-sbc 3042 df-csb 3138 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3508 df-if 3620 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-int 3949 df-iun 3992 df-disj 4085 df-br 4109 df-opab 4171 df-mpt 4172 df-tr 4208 df-id 4413 df-po 4416 df-iso 4417 df-iord 4486 df-on 4488 df-ilim 4489 df-suc 4491 df-iom 4712 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-f1 5356 df-fo 5357 df-f1o 5358 df-fv 5359 df-isom 5360 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-of 6265 df-1st 6333 df-2nd 6334 df-recs 6535 df-irdg 6600 df-frec 6621 df-1o 6646 df-oadd 6650 df-er 6766 df-map 6883 df-pm 6884 df-en 6975 df-dom 6976 df-fin 6977 df-sup 7274 df-inf 7275 df-pnf 8306 df-mnf 8307 df-xr 8308 df-ltxr 8309 df-le 8310 df-sub 8442 df-neg 8443 df-reap 8845 df-ap 8852 df-div 8943 df-inn 9234 df-2 9292 df-3 9293 df-4 9294 df-n0 9493 df-z 9574 df-uz 9850 df-q 9948 df-rp 9983 df-xneg 10101 df-xadd 10102 df-ioo 10221 df-ico 10223 df-icc 10224 df-fz 10339 df-fzo 10473 df-seqfrec 10806 df-exp 10897 df-fac 11084 df-bc 11106 df-ihash 11134 df-shft 11493 df-cj 11520 df-re 11521 df-im 11522 df-rsqrt 11676 df-abs 11677 df-clim 11957 df-sumdc 12032 df-ef 12327 df-e 12328 df-rest 13443 df-topgen 13462 df-psmet 14678 df-xmet 14679 df-met 14680 df-bl 14681 df-mopn 14682 df-top 14850 df-topon 14863 df-bases 14895 df-ntr 14948 df-cn 15040 df-cnp 15041 df-tx 15105 df-cncf 15423 df-limced 15508 df-dvap 15509 df-relog 15710 df-rpcxp 15711

This theorem is referenced by: rpcxpp1 15758 rpcxpneg 15759 rpcxpsub 15760 rpcxpmul2 15765 rpcxpsqrt 15774

W3C validator