rmxyelqirr - Mathbox for Stefan O'Rear

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Theorem rmxyelqirr 42871

Description: The solutions used to construct the X and Y sequences are quadratic irrationals. (Contributed by Stefan O'Rear, 21-Sep-2014.) (Proof shortened by SN, 23-Dec-2024.)

**Assertion**
Ref	Expression
rmxyelqirr	⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) ∈ {𝑎 ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ 𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑))})

Distinct variable groups: 𝐴,𝑎,𝑐,𝑑 𝑁,𝑎 Allowed substitution hints: 𝑁(𝑐,𝑑)

**Proof of Theorem rmxyelqirr**
Step	Hyp	Ref	Expression
1		rmspecnonsq 42868	. . . . 5 ⊢ (𝐴 ∈ (ℤ_≥‘2) → ((𝐴↑2) − 1) ∈ (ℕ ∖ ◻_NN))
2	1	adantr 480	. . . 4 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → ((𝐴↑2) − 1) ∈ (ℕ ∖ ◻_NN))
3		pell14qrval 42809	. . . 4 ⊢ (((𝐴↑2) − 1) ∈ (ℕ ∖ ◻_NN) → (Pell14QR‘((𝐴↑2) − 1)) = {𝑎 ∈ ℝ ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ (𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1)})
4	2, 3	syl 17	. . 3 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → (Pell14QR‘((𝐴↑2) − 1)) = {𝑎 ∈ ℝ ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ (𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1)})
5		rabssab 4044	. . . 4 ⊢ {𝑎 ∈ ℝ ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ (𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1)} ⊆ {𝑎 ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ (𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1)}
6		simpl 482	. . . . . . 7 ⊢ ((𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1) → 𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)))
7	6	reximi 3067	. . . . . 6 ⊢ (∃𝑑 ∈ ℤ (𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1) → ∃𝑑 ∈ ℤ 𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)))
8	7	reximi 3067	. . . . 5 ⊢ (∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ (𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1) → ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ 𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)))
9	8	ss2abi 4027	. . . 4 ⊢ {𝑎 ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ (𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1)} ⊆ {𝑎 ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ 𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑))}
10	5, 9	sstri 3953	. . 3 ⊢ {𝑎 ∈ ℝ ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ (𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑)) ∧ ((𝑐↑2) − (((𝐴↑2) − 1) · (𝑑↑2))) = 1)} ⊆ {𝑎 ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ 𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑))}
11	4, 10	eqsstrdi 3988	. 2 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → (Pell14QR‘((𝐴↑2) − 1)) ⊆ {𝑎 ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ 𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑))})
12		simpr 484	. . . 4 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → 𝑁 ∈ ℤ)
13		rmspecfund 42870	. . . . . . 7 ⊢ (𝐴 ∈ (ℤ_≥‘2) → (PellFund‘((𝐴↑2) − 1)) = (𝐴 + (√‘((𝐴↑2) − 1))))
14	13	adantr 480	. . . . . 6 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → (PellFund‘((𝐴↑2) − 1)) = (𝐴 + (√‘((𝐴↑2) − 1))))
15	14	eqcomd 2735	. . . . 5 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → (𝐴 + (√‘((𝐴↑2) − 1))) = (PellFund‘((𝐴↑2) − 1)))
16	15	oveq1d 7384	. . . 4 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) = ((PellFund‘((𝐴↑2) − 1))↑𝑁))
17		oveq2 7377	. . . . 5 ⊢ (𝑎 = 𝑁 → ((PellFund‘((𝐴↑2) − 1))↑𝑎) = ((PellFund‘((𝐴↑2) − 1))↑𝑁))
18	17	rspceeqv 3608	. . . 4 ⊢ ((𝑁 ∈ ℤ ∧ ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) = ((PellFund‘((𝐴↑2) − 1))↑𝑁)) → ∃𝑎 ∈ ℤ ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) = ((PellFund‘((𝐴↑2) − 1))↑𝑎))
19	12, 16, 18	syl2anc 584	. . 3 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → ∃𝑎 ∈ ℤ ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) = ((PellFund‘((𝐴↑2) − 1))↑𝑎))
20		pellfund14b 42860	. . . 4 ⊢ (((𝐴↑2) − 1) ∈ (ℕ ∖ ◻_NN) → (((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) ∈ (Pell14QR‘((𝐴↑2) − 1)) ↔ ∃𝑎 ∈ ℤ ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) = ((PellFund‘((𝐴↑2) − 1))↑𝑎)))
21	2, 20	syl 17	. . 3 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → (((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) ∈ (Pell14QR‘((𝐴↑2) − 1)) ↔ ∃𝑎 ∈ ℤ ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) = ((PellFund‘((𝐴↑2) − 1))↑𝑎)))
22	19, 21	mpbird 257	. 2 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) ∈ (Pell14QR‘((𝐴↑2) − 1)))
23	11, 22	sseldd 3944	1 ⊢ ((𝐴 ∈ (ℤ_≥‘2) ∧ 𝑁 ∈ ℤ) → ((𝐴 + (√‘((𝐴↑2) − 1)))↑𝑁) ∈ {𝑎 ∣ ∃𝑐 ∈ ℕ₀ ∃𝑑 ∈ ℤ 𝑎 = (𝑐 + ((√‘((𝐴↑2) − 1)) · 𝑑))})

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1540 ∈ wcel 2109 {cab 2707 ∃wrex 3053 {crab 3402 ∖ cdif 3908 ‘cfv 6499 (class class class)co 7369 ℝcr 11043 1c1 11045 + caddc 11047 · cmul 11049 − cmin 11381 ℕcn 12162 2c2 12217 ℕ₀cn0 12418 ℤcz 12505 ℤ_≥cuz 12769 ↑cexp 14002 √csqrt 15175 ◻_NNcsquarenn 42797 Pell14QRcpell14qr 42800 PellFundcpellfund 42801

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-inf2 9570 ax-cnex 11100 ax-resscn 11101 ax-1cn 11102 ax-icn 11103 ax-addcl 11104 ax-addrcl 11105 ax-mulcl 11106 ax-mulrcl 11107 ax-mulcom 11108 ax-addass 11109 ax-mulass 11110 ax-distr 11111 ax-i2m1 11112 ax-1ne0 11113 ax-1rid 11114 ax-rnegex 11115 ax-rrecex 11116 ax-cnre 11117 ax-pre-lttri 11118 ax-pre-lttrn 11119 ax-pre-ltadd 11120 ax-pre-mulgt0 11121 ax-pre-sup 11122 ax-addf 11123

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-uni 4868 df-int 4907 df-iun 4953 df-iin 4954 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-se 5585 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-isom 6508 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-of 7633 df-om 7823 df-1st 7947 df-2nd 7948 df-supp 8117 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-1o 8411 df-2o 8412 df-oadd 8415 df-omul 8416 df-er 8648 df-map 8778 df-pm 8779 df-ixp 8848 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fsupp 9289 df-fi 9338 df-sup 9369 df-inf 9370 df-oi 9439 df-card 9868 df-acn 9871 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-sub 11383 df-neg 11384 df-div 11812 df-nn 12163 df-2 12225 df-3 12226 df-4 12227 df-5 12228 df-6 12229 df-7 12230 df-8 12231 df-9 12232 df-n0 12419 df-xnn0 12492 df-z 12506 df-dec 12626 df-uz 12770 df-q 12884 df-rp 12928 df-xneg 13048 df-xadd 13049 df-xmul 13050 df-ioo 13286 df-ioc 13287 df-ico 13288 df-icc 13289 df-fz 13445 df-fzo 13592 df-fl 13730 df-mod 13808 df-seq 13943 df-exp 14003 df-fac 14215 df-bc 14244 df-hash 14272 df-shft 15009 df-cj 15041 df-re 15042 df-im 15043 df-sqrt 15177 df-abs 15178 df-limsup 15413 df-clim 15430 df-rlim 15431 df-sum 15629 df-ef 16009 df-sin 16011 df-cos 16012 df-pi 16014 df-dvds 16199 df-gcd 16441 df-numer 16681 df-denom 16682 df-struct 17093 df-sets 17110 df-slot 17128 df-ndx 17140 df-base 17156 df-ress 17177 df-plusg 17209 df-mulr 17210 df-starv 17211 df-sca 17212 df-vsca 17213 df-ip 17214 df-tset 17215 df-ple 17216 df-ds 17218 df-unif 17219 df-hom 17220 df-cco 17221 df-rest 17361 df-topn 17362 df-0g 17380 df-gsum 17381 df-topgen 17382 df-pt 17383 df-prds 17386 df-xrs 17441 df-qtop 17446 df-imas 17447 df-xps 17449 df-mre 17523 df-mrc 17524 df-acs 17526 df-mgm 18543 df-sgrp 18622 df-mnd 18638 df-submnd 18687 df-mulg 18976 df-cntz 19225 df-cmn 19688 df-psmet 21232 df-xmet 21233 df-met 21234 df-bl 21235 df-mopn 21236 df-fbas 21237 df-fg 21238 df-cnfld 21241 df-top 22757 df-topon 22774 df-topsp 22796 df-bases 22809 df-cld 22882 df-ntr 22883 df-cls 22884 df-nei 22961 df-lp 22999 df-perf 23000 df-cn 23090 df-cnp 23091 df-haus 23178 df-tx 23425 df-hmeo 23618 df-fil 23709 df-fm 23801 df-flim 23802 df-flf 23803 df-xms 24184 df-ms 24185 df-tms 24186 df-cncf 24747 df-limc 25743 df-dv 25744 df-log 26441 df-squarenn 42802 df-pell1qr 42803 df-pell14qr 42804 df-pell1234qr 42805 df-pellfund 42806

This theorem is referenced by: rmxyelxp 42874 rmxyval 42877

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