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Theorem fge0iccico 42651
Description: A range of nonnegative extended reals without plus infinity. (Contributed by Glauco Siliprandi, 17-Aug-2020.)
Hypotheses
Ref Expression
fge0iccico.f (𝜑𝐹:𝑋⟶(0[,]+∞))
fge0iccico.re (𝜑 → ¬ +∞ ∈ ran 𝐹)
Assertion
Ref Expression
fge0iccico (𝜑𝐹:𝑋⟶(0[,)+∞))

Proof of Theorem fge0iccico
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 fge0iccico.f . . . 4 (𝜑𝐹:𝑋⟶(0[,]+∞))
21ffnd 6514 . . 3 (𝜑𝐹 Fn 𝑋)
3 0xr 10687 . . . . . 6 0 ∈ ℝ*
43a1i 11 . . . . 5 ((𝜑𝑥𝑋) → 0 ∈ ℝ*)
5 pnfxr 10694 . . . . . 6 +∞ ∈ ℝ*
65a1i 11 . . . . 5 ((𝜑𝑥𝑋) → +∞ ∈ ℝ*)
7 iccssxr 12818 . . . . . 6 (0[,]+∞) ⊆ ℝ*
81ffvelrnda 6850 . . . . . 6 ((𝜑𝑥𝑋) → (𝐹𝑥) ∈ (0[,]+∞))
97, 8sseldi 3964 . . . . 5 ((𝜑𝑥𝑋) → (𝐹𝑥) ∈ ℝ*)
10 iccgelb 12792 . . . . . 6 ((0 ∈ ℝ* ∧ +∞ ∈ ℝ* ∧ (𝐹𝑥) ∈ (0[,]+∞)) → 0 ≤ (𝐹𝑥))
114, 6, 8, 10syl3anc 1367 . . . . 5 ((𝜑𝑥𝑋) → 0 ≤ (𝐹𝑥))
129adantr 483 . . . . . . . . 9 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → (𝐹𝑥) ∈ ℝ*)
13 simpr 487 . . . . . . . . . 10 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → ¬ (𝐹𝑥) < +∞)
145a1i 11 . . . . . . . . . . 11 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → +∞ ∈ ℝ*)
1514, 12xrlenltd 10706 . . . . . . . . . 10 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → (+∞ ≤ (𝐹𝑥) ↔ ¬ (𝐹𝑥) < +∞))
1613, 15mpbird 259 . . . . . . . . 9 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → +∞ ≤ (𝐹𝑥))
1712, 16xrgepnfd 41597 . . . . . . . 8 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → (𝐹𝑥) = +∞)
1817eqcomd 2827 . . . . . . 7 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → +∞ = (𝐹𝑥))
191ffund 6517 . . . . . . . . . 10 (𝜑 → Fun 𝐹)
2019adantr 483 . . . . . . . . 9 ((𝜑𝑥𝑋) → Fun 𝐹)
21 simpr 487 . . . . . . . . . 10 ((𝜑𝑥𝑋) → 𝑥𝑋)
22 fdm 6521 . . . . . . . . . . . . 13 (𝐹:𝑋⟶(0[,]+∞) → dom 𝐹 = 𝑋)
2322eqcomd 2827 . . . . . . . . . . . 12 (𝐹:𝑋⟶(0[,]+∞) → 𝑋 = dom 𝐹)
241, 23syl 17 . . . . . . . . . . 11 (𝜑𝑋 = dom 𝐹)
2524adantr 483 . . . . . . . . . 10 ((𝜑𝑥𝑋) → 𝑋 = dom 𝐹)
2621, 25eleqtrd 2915 . . . . . . . . 9 ((𝜑𝑥𝑋) → 𝑥 ∈ dom 𝐹)
27 fvelrn 6843 . . . . . . . . 9 ((Fun 𝐹𝑥 ∈ dom 𝐹) → (𝐹𝑥) ∈ ran 𝐹)
2820, 26, 27syl2anc 586 . . . . . . . 8 ((𝜑𝑥𝑋) → (𝐹𝑥) ∈ ran 𝐹)
2928adantr 483 . . . . . . 7 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → (𝐹𝑥) ∈ ran 𝐹)
3018, 29eqeltrd 2913 . . . . . 6 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → +∞ ∈ ran 𝐹)
31 fge0iccico.re . . . . . . 7 (𝜑 → ¬ +∞ ∈ ran 𝐹)
3231ad2antrr 724 . . . . . 6 (((𝜑𝑥𝑋) ∧ ¬ (𝐹𝑥) < +∞) → ¬ +∞ ∈ ran 𝐹)
3330, 32condan 816 . . . . 5 ((𝜑𝑥𝑋) → (𝐹𝑥) < +∞)
344, 6, 9, 11, 33elicod 12786 . . . 4 ((𝜑𝑥𝑋) → (𝐹𝑥) ∈ (0[,)+∞))
3534ralrimiva 3182 . . 3 (𝜑 → ∀𝑥𝑋 (𝐹𝑥) ∈ (0[,)+∞))
362, 35jca 514 . 2 (𝜑 → (𝐹 Fn 𝑋 ∧ ∀𝑥𝑋 (𝐹𝑥) ∈ (0[,)+∞)))
37 ffnfv 6881 . 2 (𝐹:𝑋⟶(0[,)+∞) ↔ (𝐹 Fn 𝑋 ∧ ∀𝑥𝑋 (𝐹𝑥) ∈ (0[,)+∞)))
3836, 37sylibr 236 1 (𝜑𝐹:𝑋⟶(0[,)+∞))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 398   = wceq 1533  wcel 2110  wral 3138   class class class wbr 5065  dom cdm 5554  ran crn 5555  Fun wfun 6348   Fn wfn 6349  wf 6350  cfv 6354  (class class class)co 7155  0cc0 10536  +∞cpnf 10671  *cxr 10673   < clt 10674  cle 10675  [,)cico 12739  [,]cicc 12740
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-sep 5202  ax-nul 5209  ax-pow 5265  ax-pr 5329  ax-un 7460  ax-cnex 10592  ax-resscn 10593  ax-1cn 10594  ax-addrcl 10597  ax-rnegex 10607  ax-cnre 10609  ax-pre-lttri 10610  ax-pre-lttrn 10611
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-nel 3124  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-sbc 3772  df-csb 3883  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4838  df-iun 4920  df-br 5066  df-opab 5128  df-mpt 5146  df-id 5459  df-po 5473  df-so 5474  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-iota 6313  df-fun 6356  df-fn 6357  df-f 6358  df-f1 6359  df-fo 6360  df-f1o 6361  df-fv 6362  df-ov 7158  df-oprab 7159  df-mpo 7160  df-1st 7688  df-2nd 7689  df-er 8288  df-en 8509  df-dom 8510  df-sdom 8511  df-pnf 10676  df-mnf 10677  df-xr 10678  df-ltxr 10679  df-le 10680  df-ico 12743  df-icc 12744
This theorem is referenced by:  fge0iccre  42655  sge00  42657  sge0sn  42660  sge0tsms  42661  sge0cl  42662  sge0supre  42670  sge0sup  42672  sge0less  42673  sge0rnbnd  42674  sge0ltfirp  42681  sge0resplit  42687  sge0le  42688  sge0split  42690  sge0iunmptlemre  42696
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