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Theorem limsupvaluz 41854
Description: The superior limit, when the domain of the function is a set of upper integers (the first condition is needed, otherwise the l.h.s. would be -∞ and the r.h.s. would be +∞). (Contributed by Glauco Siliprandi, 23-Oct-2021.)
Hypotheses
Ref Expression
limsupvaluz.m (𝜑𝑀 ∈ ℤ)
limsupvaluz.z 𝑍 = (ℤ𝑀)
limsupvaluz.f (𝜑𝐹:𝑍⟶ℝ*)
Assertion
Ref Expression
limsupvaluz (𝜑 → (lim sup‘𝐹) = inf(ran (𝑘𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑘)), ℝ*, < )), ℝ*, < ))
Distinct variable groups:   𝑘,𝐹   𝑘,𝑍
Allowed substitution hints:   𝜑(𝑘)   𝑀(𝑘)

Proof of Theorem limsupvaluz
Dummy variables 𝑖 𝑛 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2826 . . 3 (𝑖 ∈ ℝ ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑖 ∈ ℝ ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < ))
2 limsupvaluz.f . . . . 5 (𝜑𝐹:𝑍⟶ℝ*)
3 limsupvaluz.z . . . . . . 7 𝑍 = (ℤ𝑀)
43fvexi 6681 . . . . . 6 𝑍 ∈ V
54a1i 11 . . . . 5 (𝜑𝑍 ∈ V)
62, 5fexd 41245 . . . 4 (𝜑𝐹 ∈ V)
76elexd 3520 . . 3 (𝜑𝐹 ∈ V)
8 uzssre 41534 . . . . 5 (ℤ𝑀) ⊆ ℝ
93, 8eqsstri 4005 . . . 4 𝑍 ⊆ ℝ
109a1i 11 . . 3 (𝜑𝑍 ⊆ ℝ)
11 limsupvaluz.m . . . 4 (𝜑𝑀 ∈ ℤ)
123uzsup 13221 . . . 4 (𝑀 ∈ ℤ → sup(𝑍, ℝ*, < ) = +∞)
1311, 12syl 17 . . 3 (𝜑 → sup(𝑍, ℝ*, < ) = +∞)
141, 7, 10, 13limsupval2 14827 . 2 (𝜑 → (lim sup‘𝐹) = inf(((𝑖 ∈ ℝ ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) “ 𝑍), ℝ*, < ))
1510mptima2 41382 . . . 4 (𝜑 → ((𝑖 ∈ ℝ ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) “ 𝑍) = ran (𝑖𝑍 ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )))
16 oveq1 7155 . . . . . . . . . . 11 (𝑖 = 𝑛 → (𝑖[,)+∞) = (𝑛[,)+∞))
1716imaeq2d 5927 . . . . . . . . . 10 (𝑖 = 𝑛 → (𝐹 “ (𝑖[,)+∞)) = (𝐹 “ (𝑛[,)+∞)))
1817ineq1d 4192 . . . . . . . . 9 (𝑖 = 𝑛 → ((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*) = ((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*))
1918supeq1d 8899 . . . . . . . 8 (𝑖 = 𝑛 → sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < ) = sup(((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*), ℝ*, < ))
2019cbvmptv 5166 . . . . . . 7 (𝑖𝑍 ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑛𝑍 ↦ sup(((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*), ℝ*, < ))
2120a1i 11 . . . . . 6 (𝜑 → (𝑖𝑍 ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑛𝑍 ↦ sup(((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*), ℝ*, < )))
22 fimass 6552 . . . . . . . . . . . 12 (𝐹:𝑍⟶ℝ* → (𝐹 “ (𝑛[,)+∞)) ⊆ ℝ*)
232, 22syl 17 . . . . . . . . . . 11 (𝜑 → (𝐹 “ (𝑛[,)+∞)) ⊆ ℝ*)
24 df-ss 3956 . . . . . . . . . . . 12 ((𝐹 “ (𝑛[,)+∞)) ⊆ ℝ* ↔ ((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*) = (𝐹 “ (𝑛[,)+∞)))
2524biimpi 217 . . . . . . . . . . 11 ((𝐹 “ (𝑛[,)+∞)) ⊆ ℝ* → ((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*) = (𝐹 “ (𝑛[,)+∞)))
2623, 25syl 17 . . . . . . . . . 10 (𝜑 → ((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*) = (𝐹 “ (𝑛[,)+∞)))
2726adantr 481 . . . . . . . . 9 ((𝜑𝑛𝑍) → ((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*) = (𝐹 “ (𝑛[,)+∞)))
28 df-ima 5567 . . . . . . . . . 10 (𝐹 “ (𝑛[,)+∞)) = ran (𝐹 ↾ (𝑛[,)+∞))
2928a1i 11 . . . . . . . . 9 ((𝜑𝑛𝑍) → (𝐹 “ (𝑛[,)+∞)) = ran (𝐹 ↾ (𝑛[,)+∞)))
302freld 41358 . . . . . . . . . . . . 13 (𝜑 → Rel 𝐹)
31 resindm 5899 . . . . . . . . . . . . 13 (Rel 𝐹 → (𝐹 ↾ ((𝑛[,)+∞) ∩ dom 𝐹)) = (𝐹 ↾ (𝑛[,)+∞)))
3230, 31syl 17 . . . . . . . . . . . 12 (𝜑 → (𝐹 ↾ ((𝑛[,)+∞) ∩ dom 𝐹)) = (𝐹 ↾ (𝑛[,)+∞)))
3332adantr 481 . . . . . . . . . . 11 ((𝜑𝑛𝑍) → (𝐹 ↾ ((𝑛[,)+∞) ∩ dom 𝐹)) = (𝐹 ↾ (𝑛[,)+∞)))
34 incom 4182 . . . . . . . . . . . . . . 15 ((𝑛[,)+∞) ∩ 𝑍) = (𝑍 ∩ (𝑛[,)+∞))
353ineq1i 4189 . . . . . . . . . . . . . . 15 (𝑍 ∩ (𝑛[,)+∞)) = ((ℤ𝑀) ∩ (𝑛[,)+∞))
3634, 35eqtri 2849 . . . . . . . . . . . . . 14 ((𝑛[,)+∞) ∩ 𝑍) = ((ℤ𝑀) ∩ (𝑛[,)+∞))
3736a1i 11 . . . . . . . . . . . . 13 ((𝜑𝑛𝑍) → ((𝑛[,)+∞) ∩ 𝑍) = ((ℤ𝑀) ∩ (𝑛[,)+∞)))
382fdmd 6520 . . . . . . . . . . . . . . 15 (𝜑 → dom 𝐹 = 𝑍)
3938ineq2d 4193 . . . . . . . . . . . . . 14 (𝜑 → ((𝑛[,)+∞) ∩ dom 𝐹) = ((𝑛[,)+∞) ∩ 𝑍))
4039adantr 481 . . . . . . . . . . . . 13 ((𝜑𝑛𝑍) → ((𝑛[,)+∞) ∩ dom 𝐹) = ((𝑛[,)+∞) ∩ 𝑍))
413eleq2i 2909 . . . . . . . . . . . . . . . 16 (𝑛𝑍𝑛 ∈ (ℤ𝑀))
4241biimpi 217 . . . . . . . . . . . . . . 15 (𝑛𝑍𝑛 ∈ (ℤ𝑀))
4342adantl 482 . . . . . . . . . . . . . 14 ((𝜑𝑛𝑍) → 𝑛 ∈ (ℤ𝑀))
4443uzinico2 41703 . . . . . . . . . . . . 13 ((𝜑𝑛𝑍) → (ℤ𝑛) = ((ℤ𝑀) ∩ (𝑛[,)+∞)))
4537, 40, 443eqtr4d 2871 . . . . . . . . . . . 12 ((𝜑𝑛𝑍) → ((𝑛[,)+∞) ∩ dom 𝐹) = (ℤ𝑛))
4645reseq2d 5852 . . . . . . . . . . 11 ((𝜑𝑛𝑍) → (𝐹 ↾ ((𝑛[,)+∞) ∩ dom 𝐹)) = (𝐹 ↾ (ℤ𝑛)))
4733, 46eqtr3d 2863 . . . . . . . . . 10 ((𝜑𝑛𝑍) → (𝐹 ↾ (𝑛[,)+∞)) = (𝐹 ↾ (ℤ𝑛)))
4847rneqd 5807 . . . . . . . . 9 ((𝜑𝑛𝑍) → ran (𝐹 ↾ (𝑛[,)+∞)) = ran (𝐹 ↾ (ℤ𝑛)))
4927, 29, 483eqtrd 2865 . . . . . . . 8 ((𝜑𝑛𝑍) → ((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*) = ran (𝐹 ↾ (ℤ𝑛)))
5049supeq1d 8899 . . . . . . 7 ((𝜑𝑛𝑍) → sup(((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*), ℝ*, < ) = sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < ))
5150mpteq2dva 5158 . . . . . 6 (𝜑 → (𝑛𝑍 ↦ sup(((𝐹 “ (𝑛[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )))
5221, 51eqtrd 2861 . . . . 5 (𝜑 → (𝑖𝑍 ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )))
5352rneqd 5807 . . . 4 (𝜑 → ran (𝑖𝑍 ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) = ran (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )))
5415, 53eqtrd 2861 . . 3 (𝜑 → ((𝑖 ∈ ℝ ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) “ 𝑍) = ran (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )))
5554infeq1d 8930 . 2 (𝜑 → inf(((𝑖 ∈ ℝ ↦ sup(((𝐹 “ (𝑖[,)+∞)) ∩ ℝ*), ℝ*, < )) “ 𝑍), ℝ*, < ) = inf(ran (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )), ℝ*, < ))
56 fveq2 6667 . . . . . . . . 9 (𝑛 = 𝑘 → (ℤ𝑛) = (ℤ𝑘))
5756reseq2d 5852 . . . . . . . 8 (𝑛 = 𝑘 → (𝐹 ↾ (ℤ𝑛)) = (𝐹 ↾ (ℤ𝑘)))
5857rneqd 5807 . . . . . . 7 (𝑛 = 𝑘 → ran (𝐹 ↾ (ℤ𝑛)) = ran (𝐹 ↾ (ℤ𝑘)))
5958supeq1d 8899 . . . . . 6 (𝑛 = 𝑘 → sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < ) = sup(ran (𝐹 ↾ (ℤ𝑘)), ℝ*, < ))
6059cbvmptv 5166 . . . . 5 (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )) = (𝑘𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑘)), ℝ*, < ))
6160rneqi 5806 . . . 4 ran (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )) = ran (𝑘𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑘)), ℝ*, < ))
6261infeq1i 8931 . . 3 inf(ran (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )), ℝ*, < ) = inf(ran (𝑘𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑘)), ℝ*, < )), ℝ*, < )
6362a1i 11 . 2 (𝜑 → inf(ran (𝑛𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑛)), ℝ*, < )), ℝ*, < ) = inf(ran (𝑘𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑘)), ℝ*, < )), ℝ*, < ))
6414, 55, 633eqtrd 2865 1 (𝜑 → (lim sup‘𝐹) = inf(ran (𝑘𝑍 ↦ sup(ran (𝐹 ↾ (ℤ𝑘)), ℝ*, < )), ℝ*, < ))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 396   = wceq 1530  wcel 2107  Vcvv 3500  cin 3939  wss 3940  cmpt 5143  dom cdm 5554  ran crn 5555  cres 5556  cima 5557  Rel wrel 5559  wf 6348  cfv 6352  (class class class)co 7148  supcsup 8893  infcinf 8894  cr 10525  +∞cpnf 10661  *cxr 10663   < clt 10664  cz 11970  cuz 12232  [,)cico 12730  lim supclsp 14817
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2798  ax-rep 5187  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5326  ax-un 7451  ax-cnex 10582  ax-resscn 10583  ax-1cn 10584  ax-icn 10585  ax-addcl 10586  ax-addrcl 10587  ax-mulcl 10588  ax-mulrcl 10589  ax-mulcom 10590  ax-addass 10591  ax-mulass 10592  ax-distr 10593  ax-i2m1 10594  ax-1ne0 10595  ax-1rid 10596  ax-rnegex 10597  ax-rrecex 10598  ax-cnre 10599  ax-pre-lttri 10600  ax-pre-lttrn 10601  ax-pre-ltadd 10602  ax-pre-mulgt0 10603  ax-pre-sup 10604
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2620  df-eu 2652  df-clab 2805  df-cleq 2819  df-clel 2898  df-nfc 2968  df-ne 3022  df-nel 3129  df-ral 3148  df-rex 3149  df-reu 3150  df-rmo 3151  df-rab 3152  df-v 3502  df-sbc 3777  df-csb 3888  df-dif 3943  df-un 3945  df-in 3947  df-ss 3956  df-pss 3958  df-nul 4296  df-if 4471  df-pw 4544  df-sn 4565  df-pr 4567  df-tp 4569  df-op 4571  df-uni 4838  df-iun 4919  df-br 5064  df-opab 5126  df-mpt 5144  df-tr 5170  df-id 5459  df-eprel 5464  df-po 5473  df-so 5474  df-fr 5513  df-we 5515  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567  df-pred 6146  df-ord 6192  df-on 6193  df-lim 6194  df-suc 6195  df-iota 6312  df-fun 6354  df-fn 6355  df-f 6356  df-f1 6357  df-fo 6358  df-f1o 6359  df-fv 6360  df-riota 7106  df-ov 7151  df-oprab 7152  df-mpo 7153  df-om 7569  df-1st 7680  df-2nd 7681  df-wrecs 7938  df-recs 7999  df-rdg 8037  df-er 8279  df-en 8499  df-dom 8500  df-sdom 8501  df-sup 8895  df-inf 8896  df-pnf 10666  df-mnf 10667  df-xr 10668  df-ltxr 10669  df-le 10670  df-sub 10861  df-neg 10862  df-nn 11628  df-n0 11887  df-z 11971  df-uz 12233  df-ico 12734  df-fl 13152  df-limsup 14818
This theorem is referenced by:  limsupvaluzmpt  41863  limsupvaluz2  41884  limsupgtlem  41923
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