Theorem acsmap2d 18514

Description: In an algebraic closure system, if 𝑆 and 𝑇 have the same closure and 𝑆 is independent, then there is a map 𝑓 from 𝑇 into the set of finite subsets of 𝑆 such that 𝑆 equals the union of ran 𝑓. This is proven by taking the map 𝑓 from acsmapd 18513 and observing that, since 𝑆 and 𝑇 have the same closure, the closure of ∪ ran 𝑓 must contain 𝑆. Since 𝑆 is independent, by mrissmrcd 17601, ∪ ran 𝑓 must equal 𝑆. See Section II.5 in [Cohn] p. 81 to 82. (Contributed by David Moews, 1-May-2017.)

Hypotheses

Ref	Expression
acsmap2d.1	⊢ (𝜑 → 𝐴 ∈ (ACS‘𝑋))
acsmap2d.2	⊢ 𝑁 = (mrCls‘𝐴)
acsmap2d.3	⊢ 𝐼 = (mrInd‘𝐴)
acsmap2d.4	⊢ (𝜑 → 𝑆 ∈ 𝐼)
acsmap2d.5	⊢ (𝜑 → 𝑇 ⊆ 𝑋)
acsmap2d.6	⊢ (𝜑 → (𝑁‘𝑆) = (𝑁‘𝑇))

Assertion

Ref	Expression
acsmap2d	⊢ (𝜑 → ∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ∪ ran 𝑓))

Distinct variable groups:   𝑆,𝑓   𝑇,𝑓   𝜑,𝑓   𝑓,𝑁

Allowed substitution hints:   𝐴(𝑓)   𝐼(𝑓)   𝑋(𝑓)

Proof of Theorem acsmap2d

Step	Hyp	Ref	Expression
1		acsmap2d.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ (ACS‘𝑋))
2		acsmap2d.2	. . 3 ⊢ 𝑁 = (mrCls‘𝐴)
3		acsmap2d.3	. . . 4 ⊢ 𝐼 = (mrInd‘𝐴)
4	1	acsmred 17617	. . . 4 ⊢ (𝜑 → 𝐴 ∈ (Moore‘𝑋))
5		acsmap2d.4	. . . 4 ⊢ (𝜑 → 𝑆 ∈ 𝐼)
6	3, 4, 5	mrissd 17597	. . 3 ⊢ (𝜑 → 𝑆 ⊆ 𝑋)
7		acsmap2d.5	. . . . 5 ⊢ (𝜑 → 𝑇 ⊆ 𝑋)
8	4, 2, 7	mrcssidd 17586	. . . 4 ⊢ (𝜑 → 𝑇 ⊆ (𝑁‘𝑇))
9		acsmap2d.6	. . . 4 ⊢ (𝜑 → (𝑁‘𝑆) = (𝑁‘𝑇))
10	8, 9	sseqtrrd 3984	. . 3 ⊢ (𝜑 → 𝑇 ⊆ (𝑁‘𝑆))
11	1, 2, 6, 10	acsmapd 18513	. 2 ⊢ (𝜑 → ∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓)))
12		simprl 770	. . . . 5 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → 𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin))
13	4	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → 𝐴 ∈ (Moore‘𝑋))
14	5	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → 𝑆 ∈ 𝐼)
15	3, 13, 14	mrissd 17597	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → 𝑆 ⊆ 𝑋)
16	13, 2, 15	mrcssidd 17586	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → 𝑆 ⊆ (𝑁‘𝑆))
17	9	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → (𝑁‘𝑆) = (𝑁‘𝑇))
18		simprr 772	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → 𝑇 ⊆ (𝑁‘∪ ran 𝑓))
19	13, 2	mrcssvd 17584	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → (𝑁‘∪ ran 𝑓) ⊆ 𝑋)
20	13, 2, 18, 19	mrcssd 17585	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → (𝑁‘𝑇) ⊆ (𝑁‘(𝑁‘∪ ran 𝑓)))
21		frn 6695	. . . . . . . . . . . . . 14 ⊢ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ran 𝑓 ⊆ (𝒫 𝑆 ∩ Fin))
22	21	unissd 4881	. . . . . . . . . . . . 13 ⊢ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ∪ ran 𝑓 ⊆ ∪ (𝒫 𝑆 ∩ Fin))
23		unifpw 9306	. . . . . . . . . . . . 13 ⊢ ∪ (𝒫 𝑆 ∩ Fin) = 𝑆
24	22, 23	sseqtrdi 3987	. . . . . . . . . . . 12 ⊢ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ∪ ran 𝑓 ⊆ 𝑆)
25	24	ad2antrl 728	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → ∪ ran 𝑓 ⊆ 𝑆)
26	25, 15	sstrd 3957	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → ∪ ran 𝑓 ⊆ 𝑋)
27	13, 2, 26	mrcidmd 17587	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → (𝑁‘(𝑁‘∪ ran 𝑓)) = (𝑁‘∪ ran 𝑓))
28	20, 27	sseqtrd 3983	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → (𝑁‘𝑇) ⊆ (𝑁‘∪ ran 𝑓))
29	17, 28	eqsstrd 3981	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → (𝑁‘𝑆) ⊆ (𝑁‘∪ ran 𝑓))
30	16, 29	sstrd 3957	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → 𝑆 ⊆ (𝑁‘∪ ran 𝑓))
31	13, 2, 3, 30, 25, 14	mrissmrcd 17601	. . . . 5 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → 𝑆 = ∪ ran 𝑓)
32	12, 31	jca 511	. . . 4 ⊢ ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓))) → (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ∪ ran 𝑓))
33	32	ex 412	. . 3 ⊢ (𝜑 → ((𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓)) → (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ∪ ran 𝑓)))
34	33	eximdv 1917	. 2 ⊢ (𝜑 → (∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁‘∪ ran 𝑓)) → ∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ∪ ran 𝑓)))
35	11, 34	mpd 15	1 ⊢ (𝜑 → ∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ∪ ran 𝑓))

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1540  ∃wex 1779   ∈ wcel 2109   ∩ cin 3913   ⊆ wss 3914  𝒫 cpw 4563  ∪ cuni 4871  ran crn 5639  ⟶wf 6507  ‘cfv 6511  Fincfn 8918  Moorecmre 17543  mrClscmrc 17544  mrIndcmri 17545  ACScacs 17546

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5234  ax-sep 5251  ax-nul 5261  ax-pow 5320  ax-pr 5387  ax-un 7711  ax-reg 9545  ax-inf2 9594  ax-ac2 10416  ax-cnex 11124  ax-resscn 11125  ax-1cn 11126  ax-icn 11127  ax-addcl 11128  ax-addrcl 11129  ax-mulcl 11130  ax-mulrcl 11131  ax-mulcom 11132  ax-addass 11133  ax-mulass 11134  ax-distr 11135  ax-i2m1 11136  ax-1ne0 11137  ax-1rid 11138  ax-rnegex 11139  ax-rrecex 11140  ax-cnre 11141  ax-pre-lttri 11142  ax-pre-lttrn 11143  ax-pre-ltadd 11144  ax-pre-mulgt0 11145

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-nel 3030  df-ral 3045  df-rex 3054  df-rmo 3354  df-reu 3355  df-rab 3406  df-v 3449  df-sbc 3754  df-csb 3863  df-dif 3917  df-un 3919  df-in 3921  df-ss 3931  df-pss 3934  df-nul 4297  df-if 4489  df-pw 4565  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4872  df-int 4911  df-iun 4957  df-iin 4958  df-br 5108  df-opab 5170  df-mpt 5189  df-tr 5215  df-id 5533  df-eprel 5538  df-po 5546  df-so 5547  df-fr 5591  df-se 5592  df-we 5593  df-xp 5644  df-rel 5645  df-cnv 5646  df-co 5647  df-dm 5648  df-rn 5649  df-res 5650  df-ima 5651  df-pred 6274  df-ord 6335  df-on 6336  df-lim 6337  df-suc 6338  df-iota 6464  df-fun 6513  df-fn 6514  df-f 6515  df-f1 6516  df-fo 6517  df-f1o 6518  df-fv 6519  df-isom 6520  df-riota 7344  df-ov 7390  df-oprab 7391  df-mpo 7392  df-om 7843  df-1st 7968  df-2nd 7969  df-frecs 8260  df-wrecs 8291  df-recs 8340  df-rdg 8378  df-1o 8434  df-er 8671  df-en 8919  df-dom 8920  df-sdom 8921  df-fin 8922  df-r1 9717  df-rank 9718  df-card 9892  df-ac 10069  df-pnf 11210  df-mnf 11211  df-xr 11212  df-ltxr 11213  df-le 11214  df-sub 11407  df-neg 11408  df-nn 12187  df-2 12249  df-3 12250  df-4 12251  df-5 12252  df-6 12253  df-7 12254  df-8 12255  df-9 12256  df-n0 12443  df-z 12530  df-dec 12650  df-uz 12794  df-fz 13469  df-struct 17117  df-slot 17152  df-ndx 17164  df-base 17180  df-tset 17239  df-ple 17240  df-ocomp 17241  df-mre 17547  df-mrc 17548  df-mri 17549  df-acs 17550  df-proset 18255  df-drs 18256  df-poset 18274  df-ipo 18487

This theorem is referenced by:  acsinfd  18515  acsdomd  18516