2lgslem1 - Intuitionistic Logic Explorer

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Theorem 2lgslem1 15416

Description: Lemma 1 for 2lgs 15429. (Contributed by AV, 19-Jun-2021.)

**Assertion**
Ref	Expression
2lgslem1	⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (♯‘{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (1...((𝑃 − 1) / 2))(𝑥 = (𝑖 · 2) ∧ (𝑃 / 2) < (𝑥 mod 𝑃))}) = (((𝑃 − 1) / 2) − (⌊‘(𝑃 / 4))))

Distinct variable group: 𝑃,𝑖,𝑥

Proof of Theorem 2lgslem1 Dummy variables 𝑓 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		2lgslem1a 15413	. . 3 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → {𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (1...((𝑃 − 1) / 2))(𝑥 = (𝑖 · 2) ∧ (𝑃 / 2) < (𝑥 mod 𝑃))} = {𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)})
2	1	fveq2d 5565	. 2 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (♯‘{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (1...((𝑃 − 1) / 2))(𝑥 = (𝑖 · 2) ∧ (𝑃 / 2) < (𝑥 mod 𝑃))}) = (♯‘{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)}))
3		prmz 12304	. . . . . . . 8 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℤ)
4		4nn 9171	. . . . . . . 8 ⊢ 4 ∈ ℕ
5		znq 9715	. . . . . . . 8 ⊢ ((𝑃 ∈ ℤ ∧ 4 ∈ ℕ) → (𝑃 / 4) ∈ ℚ)
6	3, 4, 5	sylancl 413	. . . . . . 7 ⊢ (𝑃 ∈ ℙ → (𝑃 / 4) ∈ ℚ)
7	6	adantr 276	. . . . . 6 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (𝑃 / 4) ∈ ℚ)
8	7	flqcld 10384	. . . . 5 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (⌊‘(𝑃 / 4)) ∈ ℤ)
9	8	peano2zd 9468	. . . 4 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → ((⌊‘(𝑃 / 4)) + 1) ∈ ℤ)
10		nnoddn2prmb 12456	. . . . . 6 ⊢ (𝑃 ∈ (ℙ ∖ {2}) ↔ (𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃))
11		oddprm 12453	. . . . . 6 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → ((𝑃 − 1) / 2) ∈ ℕ)
12	10, 11	sylbir 135	. . . . 5 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → ((𝑃 − 1) / 2) ∈ ℕ)
13	12	nnzd 9464	. . . 4 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → ((𝑃 − 1) / 2) ∈ ℤ)
14	9, 13	fzfigd 10540	. . 3 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ∈ Fin)
15	14	mptexd 5792	. . . 4 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (𝑦 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ↦ (𝑦 · 2)) ∈ V)
16		eqid 2196	. . . . 5 ⊢ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) = (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))
17		eqid 2196	. . . . 5 ⊢ (𝑦 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ↦ (𝑦 · 2)) = (𝑦 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ↦ (𝑦 · 2))
18	16, 17	2lgslem1b 15414	. . . 4 ⊢ (𝑦 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ↦ (𝑦 · 2)):(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)}
19		f1oeq1 5495	. . . . 5 ⊢ (𝑓 = (𝑦 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ↦ (𝑦 · 2)) → (𝑓:(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)} ↔ (𝑦 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ↦ (𝑦 · 2)):(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)}))
20	19	spcegv 2852	. . . 4 ⊢ ((𝑦 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ↦ (𝑦 · 2)) ∈ V → ((𝑦 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ↦ (𝑦 · 2)):(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)} → ∃𝑓 𝑓:(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)}))
21	15, 18, 20	mpisyl 1457	. . 3 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → ∃𝑓 𝑓:(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)})
22		fihasheqf1oi 10896	. . . . 5 ⊢ (((((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ∈ Fin ∧ 𝑓:(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)}) → (♯‘(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))) = (♯‘{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)}))
23	22	ex 115	. . . 4 ⊢ ((((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ∈ Fin → (𝑓:(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)} → (♯‘(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))) = (♯‘{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)})))
24	23	exlimdv 1833	. . 3 ⊢ ((((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2)) ∈ Fin → (∃𝑓 𝑓:(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))–1-1-onto→{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)} → (♯‘(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))) = (♯‘{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)})))
25	14, 21, 24	sylc 62	. 2 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (♯‘(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))) = (♯‘{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))𝑥 = (𝑖 · 2)}))
26	6	flqcld 10384	. . . . 5 ⊢ (𝑃 ∈ ℙ → (⌊‘(𝑃 / 4)) ∈ ℤ)
27	26	adantr 276	. . . 4 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (⌊‘(𝑃 / 4)) ∈ ℤ)
28		oddm1d2 12074	. . . . . 6 ⊢ (𝑃 ∈ ℤ → (¬ 2 ∥ 𝑃 ↔ ((𝑃 − 1) / 2) ∈ ℤ))
29	3, 28	syl 14	. . . . 5 ⊢ (𝑃 ∈ ℙ → (¬ 2 ∥ 𝑃 ↔ ((𝑃 − 1) / 2) ∈ ℤ))
30	29	biimpa 296	. . . 4 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → ((𝑃 − 1) / 2) ∈ ℤ)
31		2lgslem1c 15415	. . . 4 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (⌊‘(𝑃 / 4)) ≤ ((𝑃 − 1) / 2))
32		eluz2 9624	. . . 4 ⊢ (((𝑃 − 1) / 2) ∈ (ℤ_≥‘(⌊‘(𝑃 / 4))) ↔ ((⌊‘(𝑃 / 4)) ∈ ℤ ∧ ((𝑃 − 1) / 2) ∈ ℤ ∧ (⌊‘(𝑃 / 4)) ≤ ((𝑃 − 1) / 2)))
33	27, 30, 31, 32	syl3anbrc 1183	. . 3 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → ((𝑃 − 1) / 2) ∈ (ℤ_≥‘(⌊‘(𝑃 / 4))))
34		hashfzp1 10933	. . 3 ⊢ (((𝑃 − 1) / 2) ∈ (ℤ_≥‘(⌊‘(𝑃 / 4))) → (♯‘(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))) = (((𝑃 − 1) / 2) − (⌊‘(𝑃 / 4))))
35	33, 34	syl 14	. 2 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (♯‘(((⌊‘(𝑃 / 4)) + 1)...((𝑃 − 1) / 2))) = (((𝑃 − 1) / 2) − (⌊‘(𝑃 / 4))))
36	2, 25, 35	3eqtr2d 2235	1 ⊢ ((𝑃 ∈ ℙ ∧ ¬ 2 ∥ 𝑃) → (♯‘{𝑥 ∈ ℤ ∣ ∃𝑖 ∈ (1...((𝑃 − 1) / 2))(𝑥 = (𝑖 · 2) ∧ (𝑃 / 2) < (𝑥 mod 𝑃))}) = (((𝑃 − 1) / 2) − (⌊‘(𝑃 / 4))))

Colors of variables: wff set class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1364 ∃wex 1506 ∈ wcel 2167 ∃wrex 2476 {crab 2479 Vcvv 2763 ∖ cdif 3154 {csn 3623 class class class wbr 4034 ↦ cmpt 4095 –1-1-onto→wf1o 5258 ‘cfv 5259 (class class class)co 5925 Fincfn 6808 1c1 7897 + caddc 7899 · cmul 7901 < clt 8078 ≤ cle 8079 − cmin 8214 / cdiv 8716 ℕcn 9007 2c2 9058 4c4 9060 ℤcz 9343 ℤ_≥cuz 9618 ℚcq 9710 ...cfz 10100 ⌊cfl 10375 mod cmo 10431 ♯chash 10884 ∥ cdvds 11969 ℙcprime 12300

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 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-coll 4149 ax-sep 4152 ax-nul 4160 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-iinf 4625 ax-cnex 7987 ax-resscn 7988 ax-1cn 7989 ax-1re 7990 ax-icn 7991 ax-addcl 7992 ax-addrcl 7993 ax-mulcl 7994 ax-mulrcl 7995 ax-addcom 7996 ax-mulcom 7997 ax-addass 7998 ax-mulass 7999 ax-distr 8000 ax-i2m1 8001 ax-0lt1 8002 ax-1rid 8003 ax-0id 8004 ax-rnegex 8005 ax-precex 8006 ax-cnre 8007 ax-pre-ltirr 8008 ax-pre-ltwlin 8009 ax-pre-lttrn 8010 ax-pre-apti 8011 ax-pre-ltadd 8012 ax-pre-mulgt0 8013 ax-pre-mulext 8014 ax-arch 8015 ax-caucvg 8016

This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-xor 1387 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-reu 2482 df-rmo 2483 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-nul 3452 df-if 3563 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-int 3876 df-iun 3919 df-br 4035 df-opab 4096 df-mpt 4097 df-tr 4133 df-id 4329 df-po 4332 df-iso 4333 df-iord 4402 df-on 4404 df-ilim 4405 df-suc 4407 df-iom 4628 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-rn 4675 df-res 4676 df-ima 4677 df-iota 5220 df-fun 5261 df-fn 5262 df-f 5263 df-f1 5264 df-fo 5265 df-f1o 5266 df-fv 5267 df-riota 5880 df-ov 5928 df-oprab 5929 df-mpo 5930 df-1st 6207 df-2nd 6208 df-recs 6372 df-frec 6458 df-1o 6483 df-2o 6484 df-er 6601 df-en 6809 df-dom 6810 df-fin 6811 df-pnf 8080 df-mnf 8081 df-xr 8082 df-ltxr 8083 df-le 8084 df-sub 8216 df-neg 8217 df-reap 8619 df-ap 8626 df-div 8717 df-inn 9008 df-2 9066 df-3 9067 df-4 9068 df-n0 9267 df-z 9344 df-uz 9619 df-q 9711 df-rp 9746 df-fz 10101 df-fl 10377 df-mod 10432 df-seqfrec 10557 df-exp 10648 df-ihash 10885 df-cj 11024 df-re 11025 df-im 11026 df-rsqrt 11180 df-abs 11181 df-dvds 11970 df-prm 12301

This theorem is referenced by: 2lgs 15429

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