Theorem fge0iccico 42645

Description: A range of nonnegative extended reals without plus infinity. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

Hypotheses

Ref	Expression
fge0iccico.f	⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞))
fge0iccico.re	⊢ (𝜑 → ¬ +∞ ∈ ran 𝐹)

Assertion

Ref	Expression
fge0iccico	⊢ (𝜑 → 𝐹:𝑋⟶(0[,)+∞))

Proof of Theorem fge0iccico

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		fge0iccico.f	. . . 4 ⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞))
2	1	ffnd 6510	. . 3 ⊢ (𝜑 → 𝐹 Fn 𝑋)
3		0xr 10682	. . . . . 6 ⊢ 0 ∈ ℝ*
4	3	a1i 11	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → 0 ∈ ℝ*)
5		pnfxr 10689	. . . . . 6 ⊢ +∞ ∈ ℝ*
6	5	a1i 11	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → +∞ ∈ ℝ*)
7		iccssxr 12813	. . . . . 6 ⊢ (0[,]+∞) ⊆ ℝ*
8	1	ffvelrnda 6846	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (𝐹‘𝑥) ∈ (0[,]+∞))
9	7, 8	sseldi 3965	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (𝐹‘𝑥) ∈ ℝ*)
10		iccgelb 12787	. . . . . 6 ⊢ ((0 ∈ ℝ* ∧ +∞ ∈ ℝ* ∧ (𝐹‘𝑥) ∈ (0[,]+∞)) → 0 ≤ (𝐹‘𝑥))
11	4, 6, 8, 10	syl3anc 1367	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → 0 ≤ (𝐹‘𝑥))
12	9	adantr 483	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → (𝐹‘𝑥) ∈ ℝ*)
13		simpr 487	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → ¬ (𝐹‘𝑥) < +∞)
14	5	a1i 11	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → +∞ ∈ ℝ*)
15	14, 12	xrlenltd 10701	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → (+∞ ≤ (𝐹‘𝑥) ↔ ¬ (𝐹‘𝑥) < +∞))
16	13, 15	mpbird 259	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → +∞ ≤ (𝐹‘𝑥))
17	12, 16	xrgepnfd 41591	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → (𝐹‘𝑥) = +∞)
18	17	eqcomd 2827	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → +∞ = (𝐹‘𝑥))
19	1	ffund 6513	. . . . . . . . . 10 ⊢ (𝜑 → Fun 𝐹)
20	19	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → Fun 𝐹)
21		simpr 487	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → 𝑥 ∈ 𝑋)
22		fdm 6517	. . . . . . . . . . . . 13 ⊢ (𝐹:𝑋⟶(0[,]+∞) → dom 𝐹 = 𝑋)
23	22	eqcomd 2827	. . . . . . . . . . . 12 ⊢ (𝐹:𝑋⟶(0[,]+∞) → 𝑋 = dom 𝐹)
24	1, 23	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑋 = dom 𝐹)
25	24	adantr 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → 𝑋 = dom 𝐹)
26	21, 25	eleqtrd 2915	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → 𝑥 ∈ dom 𝐹)
27		fvelrn 6839	. . . . . . . . 9 ⊢ ((Fun 𝐹 ∧ 𝑥 ∈ dom 𝐹) → (𝐹‘𝑥) ∈ ran 𝐹)
28	20, 26, 27	syl2anc 586	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (𝐹‘𝑥) ∈ ran 𝐹)
29	28	adantr 483	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → (𝐹‘𝑥) ∈ ran 𝐹)
30	18, 29	eqeltrd 2913	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → +∞ ∈ ran 𝐹)
31		fge0iccico.re	. . . . . . 7 ⊢ (𝜑 → ¬ +∞ ∈ ran 𝐹)
32	31	ad2antrr 724	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑋) ∧ ¬ (𝐹‘𝑥) < +∞) → ¬ +∞ ∈ ran 𝐹)
33	30, 32	condan 816	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (𝐹‘𝑥) < +∞)
34	4, 6, 9, 11, 33	elicod 12781	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (𝐹‘𝑥) ∈ (0[,)+∞))
35	34	ralrimiva 3182	. . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝑋 (𝐹‘𝑥) ∈ (0[,)+∞))
36	2, 35	jca 514	. 2 ⊢ (𝜑 → (𝐹 Fn 𝑋 ∧ ∀𝑥 ∈ 𝑋 (𝐹‘𝑥) ∈ (0[,)+∞)))
37		ffnfv 6877	. 2 ⊢ (𝐹:𝑋⟶(0[,)+∞) ↔ (𝐹 Fn 𝑋 ∧ ∀𝑥 ∈ 𝑋 (𝐹‘𝑥) ∈ (0[,)+∞)))
38	36, 37	sylibr 236	1 ⊢ (𝜑 → 𝐹:𝑋⟶(0[,)+∞))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 398   = wceq 1533   ∈ wcel 2110  ∀wral 3138   class class class wbr 5059  dom cdm 5550  ran crn 5551  Fun wfun 6344   Fn wfn 6345  ⟶wf 6346  ‘cfv 6350  (class class class)co 7150  0cc0 10531  +∞cpnf 10666  ℝ^*cxr 10668   < clt 10669   ≤ cle 10670  [,)cico 12734  [,]cicc 12735

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 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455  ax-cnex 10587  ax-resscn 10588  ax-1cn 10589  ax-addrcl 10592  ax-rnegex 10602  ax-cnre 10604  ax-pre-lttri 10605  ax-pre-lttrn 10606

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 3497  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-po 5469  df-so 5470  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-iota 6309  df-fun 6352  df-fn 6353  df-f 6354  df-f1 6355  df-fo 6356  df-f1o 6357  df-fv 6358  df-ov 7153  df-oprab 7154  df-mpo 7155  df-1st 7683  df-2nd 7684  df-er 8283  df-en 8504  df-dom 8505  df-sdom 8506  df-pnf 10671  df-mnf 10672  df-xr 10673  df-ltxr 10674  df-le 10675  df-ico 12738  df-icc 12739

This theorem is referenced by:  fge0iccre  42649  sge00  42651  sge0sn  42654  sge0tsms  42655  sge0cl  42656  sge0supre  42664  sge0sup  42666  sge0less  42667  sge0rnbnd  42668  sge0ltfirp  42675  sge0resplit  42681  sge0le  42682  sge0split  42684  sge0iunmptlemre  42690