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Theorem monoord2 10433
Description: Ordering relation for a monotonic sequence, decreasing case. (Contributed by Mario Carneiro, 18-Jul-2014.)
Hypotheses
Ref Expression
monoord2.1 (𝜑𝑁 ∈ (ℤ𝑀))
monoord2.2 ((𝜑𝑘 ∈ (𝑀...𝑁)) → (𝐹𝑘) ∈ ℝ)
monoord2.3 ((𝜑𝑘 ∈ (𝑀...(𝑁 − 1))) → (𝐹‘(𝑘 + 1)) ≤ (𝐹𝑘))
Assertion
Ref Expression
monoord2 (𝜑 → (𝐹𝑁) ≤ (𝐹𝑀))
Distinct variable groups:   𝑘,𝐹   𝑘,𝑀   𝑘,𝑁   𝜑,𝑘

Proof of Theorem monoord2
Dummy variable 𝑛 is distinct from all other variables.
StepHypRef Expression
1 monoord2.1 . . . 4 (𝜑𝑁 ∈ (ℤ𝑀))
2 monoord2.2 . . . . . . 7 ((𝜑𝑘 ∈ (𝑀...𝑁)) → (𝐹𝑘) ∈ ℝ)
32renegcld 8299 . . . . . 6 ((𝜑𝑘 ∈ (𝑀...𝑁)) → -(𝐹𝑘) ∈ ℝ)
4 eqid 2170 . . . . . 6 (𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘)) = (𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))
53, 4fmptd 5650 . . . . 5 (𝜑 → (𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘)):(𝑀...𝑁)⟶ℝ)
65ffvelrnda 5631 . . . 4 ((𝜑𝑛 ∈ (𝑀...𝑁)) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑛) ∈ ℝ)
7 monoord2.3 . . . . . . . . 9 ((𝜑𝑘 ∈ (𝑀...(𝑁 − 1))) → (𝐹‘(𝑘 + 1)) ≤ (𝐹𝑘))
87ralrimiva 2543 . . . . . . . 8 (𝜑 → ∀𝑘 ∈ (𝑀...(𝑁 − 1))(𝐹‘(𝑘 + 1)) ≤ (𝐹𝑘))
9 oveq1 5860 . . . . . . . . . . 11 (𝑘 = 𝑛 → (𝑘 + 1) = (𝑛 + 1))
109fveq2d 5500 . . . . . . . . . 10 (𝑘 = 𝑛 → (𝐹‘(𝑘 + 1)) = (𝐹‘(𝑛 + 1)))
11 fveq2 5496 . . . . . . . . . 10 (𝑘 = 𝑛 → (𝐹𝑘) = (𝐹𝑛))
1210, 11breq12d 4002 . . . . . . . . 9 (𝑘 = 𝑛 → ((𝐹‘(𝑘 + 1)) ≤ (𝐹𝑘) ↔ (𝐹‘(𝑛 + 1)) ≤ (𝐹𝑛)))
1312cbvralv 2696 . . . . . . . 8 (∀𝑘 ∈ (𝑀...(𝑁 − 1))(𝐹‘(𝑘 + 1)) ≤ (𝐹𝑘) ↔ ∀𝑛 ∈ (𝑀...(𝑁 − 1))(𝐹‘(𝑛 + 1)) ≤ (𝐹𝑛))
148, 13sylib 121 . . . . . . 7 (𝜑 → ∀𝑛 ∈ (𝑀...(𝑁 − 1))(𝐹‘(𝑛 + 1)) ≤ (𝐹𝑛))
1514r19.21bi 2558 . . . . . 6 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝐹‘(𝑛 + 1)) ≤ (𝐹𝑛))
16 fveq2 5496 . . . . . . . . 9 (𝑘 = (𝑛 + 1) → (𝐹𝑘) = (𝐹‘(𝑛 + 1)))
1716eleq1d 2239 . . . . . . . 8 (𝑘 = (𝑛 + 1) → ((𝐹𝑘) ∈ ℝ ↔ (𝐹‘(𝑛 + 1)) ∈ ℝ))
182ralrimiva 2543 . . . . . . . . 9 (𝜑 → ∀𝑘 ∈ (𝑀...𝑁)(𝐹𝑘) ∈ ℝ)
1918adantr 274 . . . . . . . 8 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → ∀𝑘 ∈ (𝑀...𝑁)(𝐹𝑘) ∈ ℝ)
20 fzp1elp1 10031 . . . . . . . . . 10 (𝑛 ∈ (𝑀...(𝑁 − 1)) → (𝑛 + 1) ∈ (𝑀...((𝑁 − 1) + 1)))
2120adantl 275 . . . . . . . . 9 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝑛 + 1) ∈ (𝑀...((𝑁 − 1) + 1)))
22 eluzelz 9496 . . . . . . . . . . . . . 14 (𝑁 ∈ (ℤ𝑀) → 𝑁 ∈ ℤ)
231, 22syl 14 . . . . . . . . . . . . 13 (𝜑𝑁 ∈ ℤ)
2423zcnd 9335 . . . . . . . . . . . 12 (𝜑𝑁 ∈ ℂ)
25 ax-1cn 7867 . . . . . . . . . . . 12 1 ∈ ℂ
26 npcan 8128 . . . . . . . . . . . 12 ((𝑁 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑁 − 1) + 1) = 𝑁)
2724, 25, 26sylancl 411 . . . . . . . . . . 11 (𝜑 → ((𝑁 − 1) + 1) = 𝑁)
2827oveq2d 5869 . . . . . . . . . 10 (𝜑 → (𝑀...((𝑁 − 1) + 1)) = (𝑀...𝑁))
2928adantr 274 . . . . . . . . 9 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝑀...((𝑁 − 1) + 1)) = (𝑀...𝑁))
3021, 29eleqtrd 2249 . . . . . . . 8 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝑛 + 1) ∈ (𝑀...𝑁))
3117, 19, 30rspcdva 2839 . . . . . . 7 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝐹‘(𝑛 + 1)) ∈ ℝ)
3211eleq1d 2239 . . . . . . . 8 (𝑘 = 𝑛 → ((𝐹𝑘) ∈ ℝ ↔ (𝐹𝑛) ∈ ℝ))
33 fzssp1 10023 . . . . . . . . . 10 (𝑀...(𝑁 − 1)) ⊆ (𝑀...((𝑁 − 1) + 1))
3433, 28sseqtrid 3197 . . . . . . . . 9 (𝜑 → (𝑀...(𝑁 − 1)) ⊆ (𝑀...𝑁))
3534sselda 3147 . . . . . . . 8 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → 𝑛 ∈ (𝑀...𝑁))
3632, 19, 35rspcdva 2839 . . . . . . 7 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝐹𝑛) ∈ ℝ)
3731, 36lenegd 8443 . . . . . 6 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → ((𝐹‘(𝑛 + 1)) ≤ (𝐹𝑛) ↔ -(𝐹𝑛) ≤ -(𝐹‘(𝑛 + 1))))
3815, 37mpbid 146 . . . . 5 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → -(𝐹𝑛) ≤ -(𝐹‘(𝑛 + 1)))
3936renegcld 8299 . . . . . 6 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → -(𝐹𝑛) ∈ ℝ)
4011negeqd 8114 . . . . . . 7 (𝑘 = 𝑛 → -(𝐹𝑘) = -(𝐹𝑛))
4140, 4fvmptg 5572 . . . . . 6 ((𝑛 ∈ (𝑀...𝑁) ∧ -(𝐹𝑛) ∈ ℝ) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑛) = -(𝐹𝑛))
4235, 39, 41syl2anc 409 . . . . 5 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑛) = -(𝐹𝑛))
4331renegcld 8299 . . . . . 6 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → -(𝐹‘(𝑛 + 1)) ∈ ℝ)
4416negeqd 8114 . . . . . . 7 (𝑘 = (𝑛 + 1) → -(𝐹𝑘) = -(𝐹‘(𝑛 + 1)))
4544, 4fvmptg 5572 . . . . . 6 (((𝑛 + 1) ∈ (𝑀...𝑁) ∧ -(𝐹‘(𝑛 + 1)) ∈ ℝ) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘(𝑛 + 1)) = -(𝐹‘(𝑛 + 1)))
4630, 43, 45syl2anc 409 . . . . 5 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘(𝑛 + 1)) = -(𝐹‘(𝑛 + 1)))
4738, 42, 463brtr4d 4021 . . . 4 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑛) ≤ ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘(𝑛 + 1)))
481, 6, 47monoord 10432 . . 3 (𝜑 → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑀) ≤ ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑁))
49 eluzfz1 9987 . . . . 5 (𝑁 ∈ (ℤ𝑀) → 𝑀 ∈ (𝑀...𝑁))
501, 49syl 14 . . . 4 (𝜑𝑀 ∈ (𝑀...𝑁))
51 fveq2 5496 . . . . . . 7 (𝑘 = 𝑀 → (𝐹𝑘) = (𝐹𝑀))
5251eleq1d 2239 . . . . . 6 (𝑘 = 𝑀 → ((𝐹𝑘) ∈ ℝ ↔ (𝐹𝑀) ∈ ℝ))
5352, 18, 50rspcdva 2839 . . . . 5 (𝜑 → (𝐹𝑀) ∈ ℝ)
5453renegcld 8299 . . . 4 (𝜑 → -(𝐹𝑀) ∈ ℝ)
5551negeqd 8114 . . . . 5 (𝑘 = 𝑀 → -(𝐹𝑘) = -(𝐹𝑀))
5655, 4fvmptg 5572 . . . 4 ((𝑀 ∈ (𝑀...𝑁) ∧ -(𝐹𝑀) ∈ ℝ) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑀) = -(𝐹𝑀))
5750, 54, 56syl2anc 409 . . 3 (𝜑 → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑀) = -(𝐹𝑀))
58 eluzfz2 9988 . . . . 5 (𝑁 ∈ (ℤ𝑀) → 𝑁 ∈ (𝑀...𝑁))
591, 58syl 14 . . . 4 (𝜑𝑁 ∈ (𝑀...𝑁))
60 fveq2 5496 . . . . . . 7 (𝑘 = 𝑁 → (𝐹𝑘) = (𝐹𝑁))
6160eleq1d 2239 . . . . . 6 (𝑘 = 𝑁 → ((𝐹𝑘) ∈ ℝ ↔ (𝐹𝑁) ∈ ℝ))
6261, 18, 59rspcdva 2839 . . . . 5 (𝜑 → (𝐹𝑁) ∈ ℝ)
6362renegcld 8299 . . . 4 (𝜑 → -(𝐹𝑁) ∈ ℝ)
6460negeqd 8114 . . . . 5 (𝑘 = 𝑁 → -(𝐹𝑘) = -(𝐹𝑁))
6564, 4fvmptg 5572 . . . 4 ((𝑁 ∈ (𝑀...𝑁) ∧ -(𝐹𝑁) ∈ ℝ) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑁) = -(𝐹𝑁))
6659, 63, 65syl2anc 409 . . 3 (𝜑 → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑁) = -(𝐹𝑁))
6748, 57, 663brtr3d 4020 . 2 (𝜑 → -(𝐹𝑀) ≤ -(𝐹𝑁))
6862, 53lenegd 8443 . 2 (𝜑 → ((𝐹𝑁) ≤ (𝐹𝑀) ↔ -(𝐹𝑀) ≤ -(𝐹𝑁)))
6967, 68mpbird 166 1 (𝜑 → (𝐹𝑁) ≤ (𝐹𝑀))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103   = wceq 1348  wcel 2141  wral 2448   class class class wbr 3989  cmpt 4050  cfv 5198  (class class class)co 5853  cc 7772  cr 7773  1c1 7775   + caddc 7777  cle 7955  cmin 8090  -cneg 8091  cz 9212  cuz 9487  ...cfz 9965
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-addcom 7874  ax-addass 7876  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-0id 7882  ax-rnegex 7883  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-ltwlin 7887  ax-pre-lttrn 7888  ax-pre-ltadd 7890
This theorem depends on definitions:  df-bi 116  df-3or 974  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-int 3832  df-br 3990  df-opab 4051  df-mpt 4052  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-fv 5206  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pnf 7956  df-mnf 7957  df-xr 7958  df-ltxr 7959  df-le 7960  df-sub 8092  df-neg 8093  df-inn 8879  df-n0 9136  df-z 9213  df-uz 9488  df-fz 9966
This theorem is referenced by: (None)
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