Theorem rexanre 15270

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 482	. . . . . 6 ⊢ ((𝜑 ∧ 𝜓) → 𝜑)
2	1	imim2i 16	. . . . 5 ⊢ ((𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → (𝑗 ≤ 𝑘 → 𝜑))
3	2	ralimi 3073	. . . 4 ⊢ (∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑))
4	3	reximi 3074	. . 3 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑))
5		simpr 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝜓) → 𝜓)
6	5	imim2i 16	. . . . 5 ⊢ ((𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → (𝑗 ≤ 𝑘 → 𝜓))
7	6	ralimi 3073	. . . 4 ⊢ (∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓))
8	7	reximi 3074	. . 3 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → (𝜑 ∧ 𝜓)) → ∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓))
9	4, 8	jca 511	. 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 5101	. . . . . . . 8 ⊢ (𝑗 = 𝑥 → (𝑗 ≤ 𝑘 ↔ 𝑥 ≤ 𝑘))
11	10	imbi1d 341	. . . . . . 7 ⊢ (𝑗 = 𝑥 → ((𝑗 ≤ 𝑘 → 𝜑) ↔ (𝑥 ≤ 𝑘 → 𝜑)))
12	11	ralbidv 3159	. . . . . 6 ⊢ (𝑗 = 𝑥 → (∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ↔ ∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑)))
13	12	cbvrexvw 3215	. . . . 5 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜑) ↔ ∃𝑥 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑))
14		breq1 5101	. . . . . . . 8 ⊢ (𝑗 = 𝑦 → (𝑗 ≤ 𝑘 ↔ 𝑦 ≤ 𝑘))
15	14	imbi1d 341	. . . . . . 7 ⊢ (𝑗 = 𝑦 → ((𝑗 ≤ 𝑘 → 𝜓) ↔ (𝑦 ≤ 𝑘 → 𝜓)))
16	15	ralbidv 3159	. . . . . 6 ⊢ (𝑗 = 𝑦 → (∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓) ↔ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)))
17	16	cbvrexvw 3215	. . . . 5 ⊢ (∃𝑗 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑗 ≤ 𝑘 → 𝜓) ↔ ∃𝑦 ∈ ℝ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓))
18	13, 17	anbi12i 628	. . . 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 3208	. . . 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 278	. . 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 4525	. . . . . . 7 ⊢ ((𝑦 ∈ ℝ ∧ 𝑥 ∈ ℝ) → if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ∈ ℝ)
22	21	ancoms 458	. . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ∈ ℝ)
23	22	adantl 481	. . . . 5 ⊢ ((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ∈ ℝ)
24		r19.26 3096	. . . . . 6 ⊢ (∀𝑘 ∈ 𝐴 ((𝑥 ≤ 𝑘 → 𝜑) ∧ (𝑦 ≤ 𝑘 → 𝜓)) ↔ (∀𝑘 ∈ 𝐴 (𝑥 ≤ 𝑘 → 𝜑) ∧ ∀𝑘 ∈ 𝐴 (𝑦 ≤ 𝑘 → 𝜓)))
25		anim12 808	. . . . . . . 8 ⊢ (((𝑥 ≤ 𝑘 → 𝜑) ∧ (𝑦 ≤ 𝑘 → 𝜓)) → ((𝑥 ≤ 𝑘 ∧ 𝑦 ≤ 𝑘) → (𝜑 ∧ 𝜓)))
26		simplrl 776	. . . . . . . . . 10 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → 𝑥 ∈ ℝ)
27		simplrr 777	. . . . . . . . . 10 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → 𝑦 ∈ ℝ)
28		simpl 482	. . . . . . . . . . 11 ⊢ ((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → 𝐴 ⊆ ℝ)
29	28	sselda 3933	. . . . . . . . . 10 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ ℝ)
30		maxle 13106	. . . . . . . . . 10 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑘 ∈ ℝ) → (if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 ↔ (𝑥 ≤ 𝑘 ∧ 𝑦 ≤ 𝑘)))
31	26, 27, 29, 30	syl3anc 1373	. . . . . . . . 9 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑘 ∈ 𝐴) → (if(𝑥 ≤ 𝑦, 𝑦, 𝑥) ≤ 𝑘 ↔ (𝑥 ≤ 𝑘 ∧ 𝑦 ≤ 𝑘)))
32	31	imbi1d 341	. . . . . . . 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 246	. . . . . . 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 3148	. . . . . 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 243	. . . . 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 5101	. . . . . 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 684	. . . 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 3193	. . 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 242	. 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 226	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))))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∈ wcel 2113  ∀wral 3051  ∃wrex 3060   ⊆ wss 3901  ifcif 4479   class class class wbr 5098  ℝcr 11025   ≤ cle 11167

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pow 5310  ax-pr 5377  ax-un 7680  ax-cnex 11082  ax-resscn 11083  ax-pre-lttri 11100  ax-pre-lttrn 11101

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-nel 3037  df-ral 3052  df-rex 3061  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-br 5099  df-opab 5161  df-mpt 5180  df-id 5519  df-po 5532  df-so 5533  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-er 8635  df-en 8884  df-dom 8885  df-sdom 8886  df-pnf 11168  df-mnf 11169  df-xr 11170  df-ltxr 11171  df-le 11172

This theorem is referenced by:  o1lo1  15460  rlimuni  15473  lo1add  15550  lo1mul  15551  rlimno1  15577