Theorem rexanre 15520

Description: Combine two different upper real properties into one. (Contributed by Mario Carneiro, 8-May-2016.)

Assertion

Ref	Expression
rexanre	⊢ (𝐴 ⊆ ℝ → (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) ↔ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ∧ ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓))))

Distinct variable groups:   𝑗,𝑘,𝐴   𝜑,𝑗   𝜓,𝑗

Allowed substitution hints:   𝜑(𝑘)   𝜓(𝑘)

Proof of Theorem rexanre

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpl 488	. . . . . 6 ⊢ ((𝜑 ∧ 𝜓) → 𝜑)
2	1	imim2i 17	. . . . 5 ⊢ ((𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → (𝑗 ≤ 𝑘 → 𝜑))
3	2	ralimi 3099	. . . 4 ⊢ (∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑))
4	3	reximi 3100	. . 3 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑))
5		simpr 490	. . . . . 6 ⊢ ((𝜑 ∧ 𝜓) → 𝜓)
6	5	imim2i 17	. . . . 5 ⊢ ((𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → (𝑗 ≤ 𝑘 → 𝜓))
7	6	ralimi 3099	. . . 4 ⊢ (∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓))
8	7	reximi 3100	. . 3 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓))
9	4, 8	jca 521	. 2 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ∧ ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓)))
10		breq1 5105	. . . . . . . 8 ⊢ (𝑗 = 𝑥 → (𝑗 ≤ 𝑘 ↔ 𝑥 ≤ 𝑘))
11	10	imbi1d 344	. . . . . . 7 ⊢ (𝑗 = 𝑥 → ((𝑗 ≤ 𝑘 → 𝜑) ↔ (𝑥 ≤ 𝑘 → 𝜑)))
12	11	ralbidv 3185	. . . . . 6 ⊢ (𝑗 = 𝑥 → (∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ↔ ∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑)))
13	12	cbvrexvw 3241	. . . . 5 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ↔ ∃𝑥 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑))
14		breq1 5105	. . . . . . . 8 ⊢ (𝑗 = 𝑦 → (𝑗 ≤ 𝑘 ↔ 𝑦 ≤ 𝑘))
15	14	imbi1d 344	. . . . . . 7 ⊢ (𝑗 = 𝑦 → ((𝑗 ≤ 𝑘 → 𝜓) ↔ (𝑦 ≤ 𝑘 → 𝜓)))
16	15	ralbidv 3185	. . . . . 6 ⊢ (𝑗 = 𝑦 → (∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓) ↔ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)))
17	16	cbvrexvw 3241	. . . . 5 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓) ↔ ∃𝑦 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓))
18	13, 17	anbi12i 640	. . . 4 ⊢ ((∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ∧ ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓)) ↔ (∃𝑥 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∃𝑦 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)))
19		reeanv 3234	. . . 4 ⊢ (∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ (∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)) ↔ (∃𝑥 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∃𝑦 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)))
20	18, 19	bitr4i 281	. . 3 ⊢ ((∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ∧ ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓)) ↔ ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ (∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)))
21		ifcl 4527	. . . . . . 7 ⊢ ((𝑦 ∈ ℝ ∧ 𝑥 ∈ ℝ) → if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ∈ ℝ)
22	21	ancoms 464	. . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ∈ ℝ)
23	22	adantl 487	. . . . 5 ⊢ ((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ∈ ℝ)
24		r19.26 3122	. . . . . 6 ⊢ (∀𝑘 ∈ 𝐴 ((𝑥 ≤ 𝑘 → 𝜑) ∧ (𝑦 ≤ 𝑘 → 𝜓)) ↔ (∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)))
25		anim12 821	. . . . . . . 8 ⊢ (((𝑥 ≤ 𝑘 → 𝜑) ∧ (𝑦 ≤ 𝑘 → 𝜓)) → ((𝑥 ≤ 𝑘 ∧ 𝑦 ≤ 𝑘) → (𝜑 ∧ 𝜓)))
26		simplrl 789	. . . . . . . . . 10 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → 𝑥 ∈ ℝ)
27		simplrr 790	. . . . . . . . . 10 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → 𝑦 ∈ ℝ)
28		simpl 488	. . . . . . . . . . 11 ⊢ ((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → 𝐴 ⊆ ℝ)
29	28	sselda 3908	. . . . . . . . . 10 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ ℝ)
30		maxle 13325	. . . . . . . . . 10 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑘 ∈ ℝ) → (if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 ↔ (𝑥 ≤ 𝑘 ∧ 𝑦 ≤ 𝑘)))
31	26, 27, 29, 30	syl3anc 1398	. . . . . . . . 9 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → (if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 ↔ (𝑥 ≤ 𝑘 ∧ 𝑦 ≤ 𝑘)))
32	31	imbi1d 344	. . . . . . . 8 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → ((if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 → (𝜑 ∧ 𝜓)) ↔ ((𝑥 ≤ 𝑘 ∧ 𝑦 ≤ 𝑘) → (𝜑 ∧ 𝜓))))
33	25, 32	imbitrrid 249	. . . . . . 7 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → (((𝑥 ≤ 𝑘 → 𝜑) ∧ (𝑦 ≤ 𝑘 → 𝜓)) → (if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 → (𝜑 ∧ 𝜓))))
34	33	ralimdva 3174	. . . . . 6 ⊢ ((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (∀𝑘 ∈ 𝐴 ((𝑥 ≤ 𝑘 → 𝜑) ∧ (𝑦 ≤ 𝑘 → 𝜓)) → ∀𝑘 ∈ 𝐴 (if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 → (𝜑 ∧ 𝜓))))
35	24, 34	biimtrrid 246	. . . . 5 ⊢ ((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → ((∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)) → ∀𝑘 ∈ 𝐴 (if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 → (𝜑 ∧ 𝜓))))
36		breq1 5105	. . . . . 6 ⊢ (𝑗 = if(𝑥 ≤ 𝑦, 𝑦, 𝑥) → (𝑗 ≤ 𝑘 ↔ if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘))
37	36	rspceaimv 3582	. . . . 5 ⊢ ((if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ∈ ℝ ∧ ∀𝑘 ∈ 𝐴 (if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 → (𝜑 ∧ 𝜓))) → ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)))
38	23, 35, 37	syl6an 697	. . . 4 ⊢ ((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → ((∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)) → ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓))))
39	38	rexlimdvva 3219	. . 3 ⊢ (𝐴 ⊆ ℝ → (∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ (∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)) → ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓))))
40	20, 39	biimtrid 245	. 2 ⊢ (𝐴 ⊆ ℝ → ((∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ∧ ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓)) → ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓))))
41	9, 40	impbid2 229	1 ⊢ (𝐴 ⊆ ℝ → (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) ↔ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ∧ ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓))))

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   ∈ wcel 2144  ∀wral 3076  ∃wrex 3086   ⊆ wss 3895  ifcif 4481   class class class wbr 5102  ℝcr 11203   ≤ cle 11348

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pow 5326  ax-pr 5390  ax-un 7752  ax-cnex 11260  ax-resscn 11261  ax-pre-lttri 11278  ax-pre-lttrn 11279

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-nel 3062  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-sbc 3739  df-csb 3847  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5545  df-po 5558  df-so 5559  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-res 5662  df-ima 5663  df-iota 6494  df-fun 6541  df-fn 6542  df-f 6543  df-f1 6544  df-fo 6545  df-f1o 6546  df-fv 6547  df-er 8721  df-en 8978  df-dom 8979  df-sdom 8980  df-pnf 11349  df-mnf 11350  df-xr 11351  df-ltxr 11352  df-le 11353

This theorem is used by:  o1lo1  15710  rlimuni  15723  lo1add  15800  lo1mul  15801  rlimno1  15827