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Theorem monoord2 10280
 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 8165 . . . . . 6 ((𝜑𝑘 ∈ (𝑀...𝑁)) → -(𝐹𝑘) ∈ ℝ)
4 eqid 2140 . . . . . 6 (𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘)) = (𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))
53, 4fmptd 5581 . . . . 5 (𝜑 → (𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘)):(𝑀...𝑁)⟶ℝ)
65ffvelrnda 5562 . . . 4 ((𝜑𝑛 ∈ (𝑀...𝑁)) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑛) ∈ ℝ)
7 monoord2.3 . . . . . . . . 9 ((𝜑𝑘 ∈ (𝑀...(𝑁 − 1))) → (𝐹‘(𝑘 + 1)) ≤ (𝐹𝑘))
87ralrimiva 2508 . . . . . . . 8 (𝜑 → ∀𝑘 ∈ (𝑀...(𝑁 − 1))(𝐹‘(𝑘 + 1)) ≤ (𝐹𝑘))
9 oveq1 5788 . . . . . . . . . . 11 (𝑘 = 𝑛 → (𝑘 + 1) = (𝑛 + 1))
109fveq2d 5432 . . . . . . . . . 10 (𝑘 = 𝑛 → (𝐹‘(𝑘 + 1)) = (𝐹‘(𝑛 + 1)))
11 fveq2 5428 . . . . . . . . . 10 (𝑘 = 𝑛 → (𝐹𝑘) = (𝐹𝑛))
1210, 11breq12d 3949 . . . . . . . . 9 (𝑘 = 𝑛 → ((𝐹‘(𝑘 + 1)) ≤ (𝐹𝑘) ↔ (𝐹‘(𝑛 + 1)) ≤ (𝐹𝑛)))
1312cbvralv 2657 . . . . . . . 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 2523 . . . . . 6 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝐹‘(𝑛 + 1)) ≤ (𝐹𝑛))
16 fveq2 5428 . . . . . . . . 9 (𝑘 = (𝑛 + 1) → (𝐹𝑘) = (𝐹‘(𝑛 + 1)))
1716eleq1d 2209 . . . . . . . 8 (𝑘 = (𝑛 + 1) → ((𝐹𝑘) ∈ ℝ ↔ (𝐹‘(𝑛 + 1)) ∈ ℝ))
182ralrimiva 2508 . . . . . . . . 9 (𝜑 → ∀𝑘 ∈ (𝑀...𝑁)(𝐹𝑘) ∈ ℝ)
1918adantr 274 . . . . . . . 8 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → ∀𝑘 ∈ (𝑀...𝑁)(𝐹𝑘) ∈ ℝ)
20 fzp1elp1 9885 . . . . . . . . . 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 9358 . . . . . . . . . . . . . 14 (𝑁 ∈ (ℤ𝑀) → 𝑁 ∈ ℤ)
231, 22syl 14 . . . . . . . . . . . . 13 (𝜑𝑁 ∈ ℤ)
2423zcnd 9197 . . . . . . . . . . . 12 (𝜑𝑁 ∈ ℂ)
25 ax-1cn 7736 . . . . . . . . . . . 12 1 ∈ ℂ
26 npcan 7994 . . . . . . . . . . . 12 ((𝑁 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑁 − 1) + 1) = 𝑁)
2724, 25, 26sylancl 410 . . . . . . . . . . 11 (𝜑 → ((𝑁 − 1) + 1) = 𝑁)
2827oveq2d 5797 . . . . . . . . . 10 (𝜑 → (𝑀...((𝑁 − 1) + 1)) = (𝑀...𝑁))
2928adantr 274 . . . . . . . . 9 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝑀...((𝑁 − 1) + 1)) = (𝑀...𝑁))
3021, 29eleqtrd 2219 . . . . . . . 8 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝑛 + 1) ∈ (𝑀...𝑁))
3117, 19, 30rspcdva 2797 . . . . . . 7 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝐹‘(𝑛 + 1)) ∈ ℝ)
3211eleq1d 2209 . . . . . . . 8 (𝑘 = 𝑛 → ((𝐹𝑘) ∈ ℝ ↔ (𝐹𝑛) ∈ ℝ))
33 fzssp1 9877 . . . . . . . . . 10 (𝑀...(𝑁 − 1)) ⊆ (𝑀...((𝑁 − 1) + 1))
3433, 28sseqtrid 3151 . . . . . . . . 9 (𝜑 → (𝑀...(𝑁 − 1)) ⊆ (𝑀...𝑁))
3534sselda 3101 . . . . . . . 8 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → 𝑛 ∈ (𝑀...𝑁))
3632, 19, 35rspcdva 2797 . . . . . . 7 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → (𝐹𝑛) ∈ ℝ)
3731, 36lenegd 8309 . . . . . 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 8165 . . . . . 6 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → -(𝐹𝑛) ∈ ℝ)
4011negeqd 7980 . . . . . . 7 (𝑘 = 𝑛 → -(𝐹𝑘) = -(𝐹𝑛))
4140, 4fvmptg 5504 . . . . . 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 8165 . . . . . 6 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → -(𝐹‘(𝑛 + 1)) ∈ ℝ)
4416negeqd 7980 . . . . . . 7 (𝑘 = (𝑛 + 1) → -(𝐹𝑘) = -(𝐹‘(𝑛 + 1)))
4544, 4fvmptg 5504 . . . . . 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 3967 . . . 4 ((𝜑𝑛 ∈ (𝑀...(𝑁 − 1))) → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑛) ≤ ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘(𝑛 + 1)))
481, 6, 47monoord 10279 . . 3 (𝜑 → ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑀) ≤ ((𝑘 ∈ (𝑀...𝑁) ↦ -(𝐹𝑘))‘𝑁))
49 eluzfz1 9841 . . . . 5 (𝑁 ∈ (ℤ𝑀) → 𝑀 ∈ (𝑀...𝑁))
501, 49syl 14 . . . 4 (𝜑𝑀 ∈ (𝑀...𝑁))
51 fveq2 5428 . . . . . . 7 (𝑘 = 𝑀 → (𝐹𝑘) = (𝐹𝑀))
5251eleq1d 2209 . . . . . 6 (𝑘 = 𝑀 → ((𝐹𝑘) ∈ ℝ ↔ (𝐹𝑀) ∈ ℝ))
5352, 18, 50rspcdva 2797 . . . . 5 (𝜑 → (𝐹𝑀) ∈ ℝ)
5453renegcld 8165 . . . 4 (𝜑 → -(𝐹𝑀) ∈ ℝ)
5551negeqd 7980 . . . . 5 (𝑘 = 𝑀 → -(𝐹𝑘) = -(𝐹𝑀))
5655, 4fvmptg 5504 . . . 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 9842 . . . . 5 (𝑁 ∈ (ℤ𝑀) → 𝑁 ∈ (𝑀...𝑁))
591, 58syl 14 . . . 4 (𝜑𝑁 ∈ (𝑀...𝑁))
60 fveq2 5428 . . . . . . 7 (𝑘 = 𝑁 → (𝐹𝑘) = (𝐹𝑁))
6160eleq1d 2209 . . . . . 6 (𝑘 = 𝑁 → ((𝐹𝑘) ∈ ℝ ↔ (𝐹𝑁) ∈ ℝ))
6261, 18, 59rspcdva 2797 . . . . 5 (𝜑 → (𝐹𝑁) ∈ ℝ)
6362renegcld 8165 . . . 4 (𝜑 → -(𝐹𝑁) ∈ ℝ)
6460negeqd 7980 . . . . 5 (𝑘 = 𝑁 → -(𝐹𝑘) = -(𝐹𝑁))
6564, 4fvmptg 5504 . . . 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 3966 . 2 (𝜑 → -(𝐹𝑀) ≤ -(𝐹𝑁))
6862, 53lenegd 8309 . 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 1332   ∈ wcel 1481  ∀wral 2417   class class class wbr 3936   ↦ cmpt 3996  ‘cfv 5130  (class class class)co 5781  ℂcc 7641  ℝcr 7642  1c1 7644   + caddc 7646   ≤ cle 7824   − cmin 7956  -cneg 7957  ℤcz 9077  ℤ≥cuz 9349  ...cfz 9820 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 604  ax-in2 605  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-13 1492  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4053  ax-pow 4105  ax-pr 4138  ax-un 4362  ax-setind 4459  ax-cnex 7734  ax-resscn 7735  ax-1cn 7736  ax-1re 7737  ax-icn 7738  ax-addcl 7739  ax-addrcl 7740  ax-mulcl 7741  ax-addcom 7743  ax-addass 7745  ax-distr 7747  ax-i2m1 7748  ax-0lt1 7749  ax-0id 7751  ax-rnegex 7752  ax-cnre 7754  ax-pre-ltirr 7755  ax-pre-ltwlin 7756  ax-pre-lttrn 7757  ax-pre-ltadd 7759 This theorem depends on definitions:  df-bi 116  df-3or 964  df-3an 965  df-tru 1335  df-fal 1338  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ne 2310  df-nel 2405  df-ral 2422  df-rex 2423  df-reu 2424  df-rab 2426  df-v 2691  df-sbc 2913  df-dif 3077  df-un 3079  df-in 3081  df-ss 3088  df-pw 3516  df-sn 3537  df-pr 3538  df-op 3540  df-uni 3744  df-int 3779  df-br 3937  df-opab 3997  df-mpt 3998  df-id 4222  df-xp 4552  df-rel 4553  df-cnv 4554  df-co 4555  df-dm 4556  df-rn 4557  df-res 4558  df-ima 4559  df-iota 5095  df-fun 5132  df-fn 5133  df-f 5134  df-fv 5138  df-riota 5737  df-ov 5784  df-oprab 5785  df-mpo 5786  df-pnf 7825  df-mnf 7826  df-xr 7827  df-ltxr 7828  df-le 7829  df-sub 7958  df-neg 7959  df-inn 8744  df-n0 9001  df-z 9078  df-uz 9350  df-fz 9821 This theorem is referenced by: (None)
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