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Theorem acsmap2d 17781
 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 17780 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 16903, ∪ 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 (𝜑𝐴 ∈ (ACS‘𝑋))
acsmap2d.2 𝑁 = (mrCls‘𝐴)
acsmap2d.3 𝐼 = (mrInd‘𝐴)
acsmap2d.4 (𝜑𝑆𝐼)
acsmap2d.5 (𝜑𝑇𝑋)
acsmap2d.6 (𝜑 → (𝑁𝑆) = (𝑁𝑇))
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
StepHypRef Expression
1 acsmap2d.1 . . 3 (𝜑𝐴 ∈ (ACS‘𝑋))
2 acsmap2d.2 . . 3 𝑁 = (mrCls‘𝐴)
3 acsmap2d.3 . . . 4 𝐼 = (mrInd‘𝐴)
41acsmred 16919 . . . 4 (𝜑𝐴 ∈ (Moore‘𝑋))
5 acsmap2d.4 . . . 4 (𝜑𝑆𝐼)
63, 4, 5mrissd 16899 . . 3 (𝜑𝑆𝑋)
7 acsmap2d.5 . . . . 5 (𝜑𝑇𝑋)
84, 2, 7mrcssidd 16888 . . . 4 (𝜑𝑇 ⊆ (𝑁𝑇))
9 acsmap2d.6 . . . 4 (𝜑 → (𝑁𝑆) = (𝑁𝑇))
108, 9sseqtrrd 3956 . . 3 (𝜑𝑇 ⊆ (𝑁𝑆))
111, 2, 6, 10acsmapd 17780 . 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))
134adantr 484 . . . . . 6 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝐴 ∈ (Moore‘𝑋))
145adantr 484 . . . . . . . . 9 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆𝐼)
153, 13, 14mrissd 16899 . . . . . . . 8 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆𝑋)
1613, 2, 15mrcssidd 16888 . . . . . . 7 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆 ⊆ (𝑁𝑆))
179adantr 484 . . . . . . . 8 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁𝑆) = (𝑁𝑇))
18 simprr 772 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑇 ⊆ (𝑁 ran 𝑓))
1913, 2mrcssvd 16886 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁 ran 𝑓) ⊆ 𝑋)
2013, 2, 18, 19mrcssd 16887 . . . . . . . . 9 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁𝑇) ⊆ (𝑁‘(𝑁 ran 𝑓)))
21 frn 6493 . . . . . . . . . . . . . 14 (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ran 𝑓 ⊆ (𝒫 𝑆 ∩ Fin))
2221unissd 4810 . . . . . . . . . . . . 13 (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ran 𝑓 (𝒫 𝑆 ∩ Fin))
23 unifpw 8811 . . . . . . . . . . . . 13 (𝒫 𝑆 ∩ Fin) = 𝑆
2422, 23sseqtrdi 3965 . . . . . . . . . . . 12 (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ran 𝑓𝑆)
2524ad2antrl 727 . . . . . . . . . . 11 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → ran 𝑓𝑆)
2625, 15sstrd 3925 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → ran 𝑓𝑋)
2713, 2, 26mrcidmd 16889 . . . . . . . . 9 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁‘(𝑁 ran 𝑓)) = (𝑁 ran 𝑓))
2820, 27sseqtrd 3955 . . . . . . . 8 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁𝑇) ⊆ (𝑁 ran 𝑓))
2917, 28eqsstrd 3953 . . . . . . 7 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁𝑆) ⊆ (𝑁 ran 𝑓))
3016, 29sstrd 3925 . . . . . 6 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆 ⊆ (𝑁 ran 𝑓))
3113, 2, 3, 30, 25, 14mrissmrcd 16903 . . . . 5 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆 = ran 𝑓)
3212, 31jca 515 . . . 4 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ran 𝑓))
3332ex 416 . . 3 (𝜑 → ((𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓)) → (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ran 𝑓)))
3433eximdv 1918 . 2 (𝜑 → (∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓)) → ∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ran 𝑓)))
3511, 34mpd 15 1 (𝜑 → ∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ran 𝑓))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 399   = wceq 1538  ∃wex 1781   ∈ wcel 2111   ∩ cin 3880   ⊆ wss 3881  𝒫 cpw 4497  ∪ cuni 4800  ran crn 5520  ⟶wf 6320  ‘cfv 6324  Fincfn 8492  Moorecmre 16845  mrClscmrc 16846  mrIndcmri 16847  ACScacs 16848 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-rep 5154  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441  ax-reg 9040  ax-inf2 9088  ax-ac2 9874  ax-cnex 10582  ax-resscn 10583  ax-1cn 10584  ax-icn 10585  ax-addcl 10586  ax-addrcl 10587  ax-mulcl 10588  ax-mulrcl 10589  ax-mulcom 10590  ax-addass 10591  ax-mulass 10592  ax-distr 10593  ax-i2m1 10594  ax-1ne0 10595  ax-1rid 10596  ax-rnegex 10597  ax-rrecex 10598  ax-cnre 10599  ax-pre-lttri 10600  ax-pre-lttrn 10601  ax-pre-ltadd 10602  ax-pre-mulgt0 10603 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-nel 3092  df-ral 3111  df-rex 3112  df-reu 3113  df-rmo 3114  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4801  df-int 4839  df-iun 4883  df-iin 4884  df-br 5031  df-opab 5093  df-mpt 5111  df-tr 5137  df-id 5425  df-eprel 5430  df-po 5438  df-so 5439  df-fr 5478  df-se 5479  df-we 5480  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-pred 6116  df-ord 6162  df-on 6163  df-lim 6164  df-suc 6165  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-isom 6333  df-riota 7093  df-ov 7138  df-oprab 7139  df-mpo 7140  df-om 7561  df-1st 7671  df-2nd 7672  df-wrecs 7930  df-recs 7991  df-rdg 8029  df-1o 8085  df-oadd 8089  df-er 8272  df-en 8493  df-dom 8494  df-sdom 8495  df-fin 8496  df-r1 9177  df-rank 9178  df-card 9352  df-ac 9527  df-pnf 10666  df-mnf 10667  df-xr 10668  df-ltxr 10669  df-le 10670  df-sub 10861  df-neg 10862  df-nn 11626  df-2 11688  df-3 11689  df-4 11690  df-5 11691  df-6 11692  df-7 11693  df-8 11694  df-9 11695  df-n0 11886  df-z 11970  df-dec 12087  df-uz 12232  df-fz 12886  df-struct 16477  df-ndx 16478  df-slot 16479  df-base 16481  df-tset 16576  df-ple 16577  df-ocomp 16578  df-mre 16849  df-mrc 16850  df-mri 16851  df-acs 16852  df-proset 17530  df-drs 17531  df-poset 17548  df-ipo 17754 This theorem is referenced by:  acsinfd  17782  acsdomd  17783
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