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Theorem dvdsflf1o 26336
Description: A bijection from the numbers less than 𝑁 / 𝐴 to the multiples of 𝐴 less than 𝑁. Useful for some sum manipulations. (Contributed by Mario Carneiro, 3-May-2016.)
Hypotheses
Ref Expression
dvdsflf1o.1 (𝜑𝐴 ∈ ℝ)
dvdsflf1o.2 (𝜑𝑁 ∈ ℕ)
dvdsflf1o.f 𝐹 = (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ↦ (𝑁 · 𝑛))
Assertion
Ref Expression
dvdsflf1o (𝜑𝐹:(1...(⌊‘(𝐴 / 𝑁)))–1-1-onto→{𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})
Distinct variable groups:   𝑥,𝑛,𝐴   𝑛,𝑁,𝑥   𝜑,𝑛
Allowed substitution hints:   𝜑(𝑥)   𝐹(𝑥,𝑛)

Proof of Theorem dvdsflf1o
Dummy variable 𝑚 is distinct from all other variables.
StepHypRef Expression
1 dvdsflf1o.f . 2 𝐹 = (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ↦ (𝑁 · 𝑛))
2 breq2 5078 . . 3 (𝑥 = (𝑁 · 𝑛) → (𝑁𝑥𝑁 ∥ (𝑁 · 𝑛)))
3 dvdsflf1o.2 . . . . 5 (𝜑𝑁 ∈ ℕ)
4 elfznn 13285 . . . . 5 (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) → 𝑛 ∈ ℕ)
5 nnmulcl 11997 . . . . 5 ((𝑁 ∈ ℕ ∧ 𝑛 ∈ ℕ) → (𝑁 · 𝑛) ∈ ℕ)
63, 4, 5syl2an 596 . . . 4 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → (𝑁 · 𝑛) ∈ ℕ)
7 dvdsflf1o.1 . . . . . . . . 9 (𝜑𝐴 ∈ ℝ)
87, 3nndivred 12027 . . . . . . . 8 (𝜑 → (𝐴 / 𝑁) ∈ ℝ)
9 fznnfl 13582 . . . . . . . 8 ((𝐴 / 𝑁) ∈ ℝ → (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ↔ (𝑛 ∈ ℕ ∧ 𝑛 ≤ (𝐴 / 𝑁))))
108, 9syl 17 . . . . . . 7 (𝜑 → (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ↔ (𝑛 ∈ ℕ ∧ 𝑛 ≤ (𝐴 / 𝑁))))
1110simplbda 500 . . . . . 6 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → 𝑛 ≤ (𝐴 / 𝑁))
124adantl 482 . . . . . . . 8 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → 𝑛 ∈ ℕ)
1312nnred 11988 . . . . . . 7 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → 𝑛 ∈ ℝ)
147adantr 481 . . . . . . 7 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → 𝐴 ∈ ℝ)
153nnred 11988 . . . . . . . 8 (𝜑𝑁 ∈ ℝ)
1615adantr 481 . . . . . . 7 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → 𝑁 ∈ ℝ)
173nngt0d 12022 . . . . . . . 8 (𝜑 → 0 < 𝑁)
1817adantr 481 . . . . . . 7 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → 0 < 𝑁)
19 lemuldiv2 11856 . . . . . . 7 ((𝑛 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ (𝑁 ∈ ℝ ∧ 0 < 𝑁)) → ((𝑁 · 𝑛) ≤ 𝐴𝑛 ≤ (𝐴 / 𝑁)))
2013, 14, 16, 18, 19syl112anc 1373 . . . . . 6 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → ((𝑁 · 𝑛) ≤ 𝐴𝑛 ≤ (𝐴 / 𝑁)))
2111, 20mpbird 256 . . . . 5 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → (𝑁 · 𝑛) ≤ 𝐴)
223nnzd 12425 . . . . . . 7 (𝜑𝑁 ∈ ℤ)
23 elfzelz 13256 . . . . . . 7 (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) → 𝑛 ∈ ℤ)
24 zmulcl 12369 . . . . . . 7 ((𝑁 ∈ ℤ ∧ 𝑛 ∈ ℤ) → (𝑁 · 𝑛) ∈ ℤ)
2522, 23, 24syl2an 596 . . . . . 6 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → (𝑁 · 𝑛) ∈ ℤ)
26 flge 13525 . . . . . 6 ((𝐴 ∈ ℝ ∧ (𝑁 · 𝑛) ∈ ℤ) → ((𝑁 · 𝑛) ≤ 𝐴 ↔ (𝑁 · 𝑛) ≤ (⌊‘𝐴)))
2714, 25, 26syl2anc 584 . . . . 5 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → ((𝑁 · 𝑛) ≤ 𝐴 ↔ (𝑁 · 𝑛) ≤ (⌊‘𝐴)))
2821, 27mpbid 231 . . . 4 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → (𝑁 · 𝑛) ≤ (⌊‘𝐴))
297flcld 13518 . . . . . 6 (𝜑 → (⌊‘𝐴) ∈ ℤ)
3029adantr 481 . . . . 5 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → (⌊‘𝐴) ∈ ℤ)
31 fznn 13324 . . . . 5 ((⌊‘𝐴) ∈ ℤ → ((𝑁 · 𝑛) ∈ (1...(⌊‘𝐴)) ↔ ((𝑁 · 𝑛) ∈ ℕ ∧ (𝑁 · 𝑛) ≤ (⌊‘𝐴))))
3230, 31syl 17 . . . 4 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → ((𝑁 · 𝑛) ∈ (1...(⌊‘𝐴)) ↔ ((𝑁 · 𝑛) ∈ ℕ ∧ (𝑁 · 𝑛) ≤ (⌊‘𝐴))))
336, 28, 32mpbir2and 710 . . 3 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → (𝑁 · 𝑛) ∈ (1...(⌊‘𝐴)))
34 dvdsmul1 15987 . . . 4 ((𝑁 ∈ ℤ ∧ 𝑛 ∈ ℤ) → 𝑁 ∥ (𝑁 · 𝑛))
3522, 23, 34syl2an 596 . . 3 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → 𝑁 ∥ (𝑁 · 𝑛))
362, 33, 35elrabd 3626 . 2 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → (𝑁 · 𝑛) ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})
37 breq2 5078 . . . . . . 7 (𝑥 = 𝑚 → (𝑁𝑥𝑁𝑚))
3837elrab 3624 . . . . . 6 (𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥} ↔ (𝑚 ∈ (1...(⌊‘𝐴)) ∧ 𝑁𝑚))
3938simprbi 497 . . . . 5 (𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥} → 𝑁𝑚)
4039adantl 482 . . . 4 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝑁𝑚)
41 elrabi 3618 . . . . . . 7 (𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥} → 𝑚 ∈ (1...(⌊‘𝐴)))
4241adantl 482 . . . . . 6 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝑚 ∈ (1...(⌊‘𝐴)))
43 elfznn 13285 . . . . . 6 (𝑚 ∈ (1...(⌊‘𝐴)) → 𝑚 ∈ ℕ)
4442, 43syl 17 . . . . 5 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝑚 ∈ ℕ)
453adantr 481 . . . . 5 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝑁 ∈ ℕ)
46 nndivdvds 15972 . . . . 5 ((𝑚 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑁𝑚 ↔ (𝑚 / 𝑁) ∈ ℕ))
4744, 45, 46syl2anc 584 . . . 4 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → (𝑁𝑚 ↔ (𝑚 / 𝑁) ∈ ℕ))
4840, 47mpbid 231 . . 3 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → (𝑚 / 𝑁) ∈ ℕ)
49 fznnfl 13582 . . . . . . 7 (𝐴 ∈ ℝ → (𝑚 ∈ (1...(⌊‘𝐴)) ↔ (𝑚 ∈ ℕ ∧ 𝑚𝐴)))
507, 49syl 17 . . . . . 6 (𝜑 → (𝑚 ∈ (1...(⌊‘𝐴)) ↔ (𝑚 ∈ ℕ ∧ 𝑚𝐴)))
5150simplbda 500 . . . . 5 ((𝜑𝑚 ∈ (1...(⌊‘𝐴))) → 𝑚𝐴)
5241, 51sylan2 593 . . . 4 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝑚𝐴)
5344nnred 11988 . . . . 5 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝑚 ∈ ℝ)
547adantr 481 . . . . 5 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝐴 ∈ ℝ)
5515adantr 481 . . . . 5 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝑁 ∈ ℝ)
5617adantr 481 . . . . 5 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 0 < 𝑁)
57 lediv1 11840 . . . . 5 ((𝑚 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ (𝑁 ∈ ℝ ∧ 0 < 𝑁)) → (𝑚𝐴 ↔ (𝑚 / 𝑁) ≤ (𝐴 / 𝑁)))
5853, 54, 55, 56, 57syl112anc 1373 . . . 4 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → (𝑚𝐴 ↔ (𝑚 / 𝑁) ≤ (𝐴 / 𝑁)))
5952, 58mpbid 231 . . 3 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → (𝑚 / 𝑁) ≤ (𝐴 / 𝑁))
608adantr 481 . . . 4 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → (𝐴 / 𝑁) ∈ ℝ)
61 fznnfl 13582 . . . 4 ((𝐴 / 𝑁) ∈ ℝ → ((𝑚 / 𝑁) ∈ (1...(⌊‘(𝐴 / 𝑁))) ↔ ((𝑚 / 𝑁) ∈ ℕ ∧ (𝑚 / 𝑁) ≤ (𝐴 / 𝑁))))
6260, 61syl 17 . . 3 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → ((𝑚 / 𝑁) ∈ (1...(⌊‘(𝐴 / 𝑁))) ↔ ((𝑚 / 𝑁) ∈ ℕ ∧ (𝑚 / 𝑁) ≤ (𝐴 / 𝑁))))
6348, 59, 62mpbir2and 710 . 2 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → (𝑚 / 𝑁) ∈ (1...(⌊‘(𝐴 / 𝑁))))
6444nncnd 11989 . . . . 5 ((𝜑𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥}) → 𝑚 ∈ ℂ)
6564adantrl 713 . . . 4 ((𝜑 ∧ (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ∧ 𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})) → 𝑚 ∈ ℂ)
663nncnd 11989 . . . . 5 (𝜑𝑁 ∈ ℂ)
6766adantr 481 . . . 4 ((𝜑 ∧ (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ∧ 𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})) → 𝑁 ∈ ℂ)
6812nncnd 11989 . . . . 5 ((𝜑𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁)))) → 𝑛 ∈ ℂ)
6968adantrr 714 . . . 4 ((𝜑 ∧ (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ∧ 𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})) → 𝑛 ∈ ℂ)
703nnne0d 12023 . . . . 5 (𝜑𝑁 ≠ 0)
7170adantr 481 . . . 4 ((𝜑 ∧ (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ∧ 𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})) → 𝑁 ≠ 0)
7265, 67, 69, 71divmuld 11773 . . 3 ((𝜑 ∧ (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ∧ 𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})) → ((𝑚 / 𝑁) = 𝑛 ↔ (𝑁 · 𝑛) = 𝑚))
73 eqcom 2745 . . 3 (𝑛 = (𝑚 / 𝑁) ↔ (𝑚 / 𝑁) = 𝑛)
74 eqcom 2745 . . 3 (𝑚 = (𝑁 · 𝑛) ↔ (𝑁 · 𝑛) = 𝑚)
7572, 73, 743bitr4g 314 . 2 ((𝜑 ∧ (𝑛 ∈ (1...(⌊‘(𝐴 / 𝑁))) ∧ 𝑚 ∈ {𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})) → (𝑛 = (𝑚 / 𝑁) ↔ 𝑚 = (𝑁 · 𝑛)))
761, 36, 63, 75f1o2d 7523 1 (𝜑𝐹:(1...(⌊‘(𝐴 / 𝑁)))–1-1-onto→{𝑥 ∈ (1...(⌊‘𝐴)) ∣ 𝑁𝑥})
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 396   = wceq 1539  wcel 2106  wne 2943  {crab 3068   class class class wbr 5074  cmpt 5157  1-1-ontowf1o 6432  cfv 6433  (class class class)co 7275  cc 10869  cr 10870  0cc0 10871  1c1 10872   · cmul 10876   < clt 11009  cle 11010   / cdiv 11632  cn 11973  cz 12319  ...cfz 13239  cfl 13510  cdvds 15963
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588  ax-cnex 10927  ax-resscn 10928  ax-1cn 10929  ax-icn 10930  ax-addcl 10931  ax-addrcl 10932  ax-mulcl 10933  ax-mulrcl 10934  ax-mulcom 10935  ax-addass 10936  ax-mulass 10937  ax-distr 10938  ax-i2m1 10939  ax-1ne0 10940  ax-1rid 10941  ax-rnegex 10942  ax-rrecex 10943  ax-cnre 10944  ax-pre-lttri 10945  ax-pre-lttrn 10946  ax-pre-ltadd 10947  ax-pre-mulgt0 10948  ax-pre-sup 10949
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-nel 3050  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-pss 3906  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-iun 4926  df-br 5075  df-opab 5137  df-mpt 5158  df-tr 5192  df-id 5489  df-eprel 5495  df-po 5503  df-so 5504  df-fr 5544  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-pred 6202  df-ord 6269  df-on 6270  df-lim 6271  df-suc 6272  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-riota 7232  df-ov 7278  df-oprab 7279  df-mpo 7280  df-om 7713  df-1st 7831  df-2nd 7832  df-frecs 8097  df-wrecs 8128  df-recs 8202  df-rdg 8241  df-er 8498  df-en 8734  df-dom 8735  df-sdom 8736  df-sup 9201  df-inf 9202  df-pnf 11011  df-mnf 11012  df-xr 11013  df-ltxr 11014  df-le 11015  df-sub 11207  df-neg 11208  df-div 11633  df-nn 11974  df-n0 12234  df-z 12320  df-uz 12583  df-fz 13240  df-fl 13512  df-dvds 15964
This theorem is referenced by:  dvdsflsumcom  26337  logfac2  26365
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