qexpz - Intuitionistic Logic Explorer

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Theorem qexpz 12349

Description: If a power of a rational number is an integer, then the number is an integer. (Contributed by Mario Carneiro, 10-Aug-2015.)

**Assertion**
Ref	Expression
qexpz	⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) → 𝐴 ∈ ℤ)

Proof of Theorem qexpz Dummy variable 𝑝 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		0z 9263	. . . 4 ⊢ 0 ∈ ℤ
2		eleq1 2240	. . . 4 ⊢ (𝐴 = 0 → (𝐴 ∈ ℤ ↔ 0 ∈ ℤ))
3	1, 2	mpbiri 168	. . 3 ⊢ (𝐴 = 0 → 𝐴 ∈ ℤ)
4	3	adantl 277	. 2 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 = 0) → 𝐴 ∈ ℤ)
5		simpll2 1037	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝑁 ∈ ℕ)
6	5	nncnd 8932	. . . . . . 7 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝑁 ∈ ℂ)
7	6	mul01d 8349	. . . . . 6 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝑁 · 0) = 0)
8		simpr 110	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝑝 ∈ ℙ)
9		simpll3 1038	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝐴↑𝑁) ∈ ℤ)
10		simpll1 1036	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝐴 ∈ ℚ)
11		qcn 9633	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℚ → 𝐴 ∈ ℂ)
12	10, 11	syl 14	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝐴 ∈ ℂ)
13		simplr 528	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝐴 ≠ 0)
14		zq 9625	. . . . . . . . . . . . . 14 ⊢ (0 ∈ ℤ → 0 ∈ ℚ)
15	1, 14	ax-mp 5	. . . . . . . . . . . . 13 ⊢ 0 ∈ ℚ
16		qapne 9638	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℚ ∧ 0 ∈ ℚ) → (𝐴 # 0 ↔ 𝐴 ≠ 0))
17	10, 15, 16	sylancl 413	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝐴 # 0 ↔ 𝐴 ≠ 0))
18	13, 17	mpbird 167	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝐴 # 0)
19	5	nnzd 9373	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝑁 ∈ ℤ)
20	12, 18, 19	expap0d 10659	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝐴↑𝑁) # 0)
21		0zd 9264	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 0 ∈ ℤ)
22		zapne 9326	. . . . . . . . . . 11 ⊢ (((𝐴↑𝑁) ∈ ℤ ∧ 0 ∈ ℤ) → ((𝐴↑𝑁) # 0 ↔ (𝐴↑𝑁) ≠ 0))
23	9, 21, 22	syl2anc 411	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → ((𝐴↑𝑁) # 0 ↔ (𝐴↑𝑁) ≠ 0))
24	20, 23	mpbid 147	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝐴↑𝑁) ≠ 0)
25		pczcl 12297	. . . . . . . . 9 ⊢ ((𝑝 ∈ ℙ ∧ ((𝐴↑𝑁) ∈ ℤ ∧ (𝐴↑𝑁) ≠ 0)) → (𝑝 pCnt (𝐴↑𝑁)) ∈ ℕ₀)
26	8, 9, 24, 25	syl12anc 1236	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝑝 pCnt (𝐴↑𝑁)) ∈ ℕ₀)
27	26	nn0ge0d 9231	. . . . . . 7 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 0 ≤ (𝑝 pCnt (𝐴↑𝑁)))
28		pcexp 12308	. . . . . . . 8 ⊢ ((𝑝 ∈ ℙ ∧ (𝐴 ∈ ℚ ∧ 𝐴 ≠ 0) ∧ 𝑁 ∈ ℤ) → (𝑝 pCnt (𝐴↑𝑁)) = (𝑁 · (𝑝 pCnt 𝐴)))
29	8, 10, 13, 19, 28	syl121anc 1243	. . . . . . 7 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝑝 pCnt (𝐴↑𝑁)) = (𝑁 · (𝑝 pCnt 𝐴)))
30	27, 29	breqtrd 4029	. . . . . 6 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 0 ≤ (𝑁 · (𝑝 pCnt 𝐴)))
31	7, 30	eqbrtrd 4025	. . . . 5 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝑁 · 0) ≤ (𝑁 · (𝑝 pCnt 𝐴)))
32		0red 7957	. . . . . 6 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 0 ∈ ℝ)
33		pcqcl 12305	. . . . . . . 8 ⊢ ((𝑝 ∈ ℙ ∧ (𝐴 ∈ ℚ ∧ 𝐴 ≠ 0)) → (𝑝 pCnt 𝐴) ∈ ℤ)
34	8, 10, 13, 33	syl12anc 1236	. . . . . . 7 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝑝 pCnt 𝐴) ∈ ℤ)
35	34	zred 9374	. . . . . 6 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (𝑝 pCnt 𝐴) ∈ ℝ)
36	5	nnred 8931	. . . . . 6 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 𝑁 ∈ ℝ)
37	5	nngt0d 8962	. . . . . 6 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 0 < 𝑁)
38		lemul2 8813	. . . . . 6 ⊢ ((0 ∈ ℝ ∧ (𝑝 pCnt 𝐴) ∈ ℝ ∧ (𝑁 ∈ ℝ ∧ 0 < 𝑁)) → (0 ≤ (𝑝 pCnt 𝐴) ↔ (𝑁 · 0) ≤ (𝑁 · (𝑝 pCnt 𝐴))))
39	32, 35, 36, 37, 38	syl112anc 1242	. . . . 5 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → (0 ≤ (𝑝 pCnt 𝐴) ↔ (𝑁 · 0) ≤ (𝑁 · (𝑝 pCnt 𝐴))))
40	31, 39	mpbird 167	. . . 4 ⊢ ((((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) ∧ 𝑝 ∈ ℙ) → 0 ≤ (𝑝 pCnt 𝐴))
41	40	ralrimiva 2550	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) → ∀𝑝 ∈ ℙ 0 ≤ (𝑝 pCnt 𝐴))
42		simpl1 1000	. . . 4 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) → 𝐴 ∈ ℚ)
43		pcz 12330	. . . 4 ⊢ (𝐴 ∈ ℚ → (𝐴 ∈ ℤ ↔ ∀𝑝 ∈ ℙ 0 ≤ (𝑝 pCnt 𝐴)))
44	42, 43	syl 14	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) → (𝐴 ∈ ℤ ↔ ∀𝑝 ∈ ℙ 0 ≤ (𝑝 pCnt 𝐴)))
45	41, 44	mpbird 167	. 2 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) ∧ 𝐴 ≠ 0) → 𝐴 ∈ ℤ)
46		simp1 997	. . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) → 𝐴 ∈ ℚ)
47		qdceq 10246	. . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 0 ∈ ℚ) → DECID 𝐴 = 0)
48	46, 15, 47	sylancl 413	. . 3 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) → DECID 𝐴 = 0)
49		dcne 2358	. . 3 ⊢ (DECID 𝐴 = 0 ↔ (𝐴 = 0 ∨ 𝐴 ≠ 0))
50	48, 49	sylib 122	. 2 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) → (𝐴 = 0 ∨ 𝐴 ≠ 0))
51	4, 45, 50	mpjaodan 798	1 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ ℕ ∧ (𝐴↑𝑁) ∈ ℤ) → 𝐴 ∈ ℤ)

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∨ wo 708 DECID wdc 834 ∧ w3a 978 = wceq 1353 ∈ wcel 2148 ≠ wne 2347 ∀wral 2455 class class class wbr 4003 (class class class)co 5874 ℂcc 7808 ℝcr 7809 0cc0 7810 · cmul 7815 < clt 7991 ≤ cle 7992 # cap 8537 ℕcn 8918 ℕ₀cn0 9175 ℤcz 9252 ℚcq 9618 ↑cexp 10518 ℙcprime 12106 pCnt cpc 12283

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 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4118 ax-sep 4121 ax-nul 4129 ax-pow 4174 ax-pr 4209 ax-un 4433 ax-setind 4536 ax-iinf 4587 ax-cnex 7901 ax-resscn 7902 ax-1cn 7903 ax-1re 7904 ax-icn 7905 ax-addcl 7906 ax-addrcl 7907 ax-mulcl 7908 ax-mulrcl 7909 ax-addcom 7910 ax-mulcom 7911 ax-addass 7912 ax-mulass 7913 ax-distr 7914 ax-i2m1 7915 ax-0lt1 7916 ax-1rid 7917 ax-0id 7918 ax-rnegex 7919 ax-precex 7920 ax-cnre 7921 ax-pre-ltirr 7922 ax-pre-ltwlin 7923 ax-pre-lttrn 7924 ax-pre-apti 7925 ax-pre-ltadd 7926 ax-pre-mulgt0 7927 ax-pre-mulext 7928 ax-arch 7929 ax-caucvg 7930

This theorem depends on definitions: df-bi 117 df-stab 831 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rmo 2463 df-rab 2464 df-v 2739 df-sbc 2963 df-csb 3058 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-nul 3423 df-if 3535 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-int 3845 df-iun 3888 df-br 4004 df-opab 4065 df-mpt 4066 df-tr 4102 df-id 4293 df-po 4296 df-iso 4297 df-iord 4366 df-on 4368 df-ilim 4369 df-suc 4371 df-iom 4590 df-xp 4632 df-rel 4633 df-cnv 4634 df-co 4635 df-dm 4636 df-rn 4637 df-res 4638 df-ima 4639 df-iota 5178 df-fun 5218 df-fn 5219 df-f 5220 df-f1 5221 df-fo 5222 df-f1o 5223 df-fv 5224 df-isom 5225 df-riota 5830 df-ov 5877 df-oprab 5878 df-mpo 5879 df-1st 6140 df-2nd 6141 df-recs 6305 df-frec 6391 df-1o 6416 df-2o 6417 df-er 6534 df-en 6740 df-sup 6982 df-inf 6983 df-pnf 7993 df-mnf 7994 df-xr 7995 df-ltxr 7996 df-le 7997 df-sub 8129 df-neg 8130 df-reap 8531 df-ap 8538 df-div 8629 df-inn 8919 df-2 8977 df-3 8978 df-4 8979 df-n0 9176 df-xnn0 9239 df-z 9253 df-uz 9528 df-q 9619 df-rp 9653 df-fz 10008 df-fzo 10142 df-fl 10269 df-mod 10322 df-seqfrec 10445 df-exp 10519 df-cj 10850 df-re 10851 df-im 10852 df-rsqrt 11006 df-abs 11007 df-dvds 11794 df-gcd 11943 df-prm 12107 df-pc 12284

This theorem is referenced by: (None)

W3C validator