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Theorem acsmap2d 17386
 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 17385 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 16507, ∪ 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 16523 . . . 4 (𝜑𝐴 ∈ (Moore‘𝑋))
5 acsmap2d.4 . . . 4 (𝜑𝑆𝐼)
63, 4, 5mrissd 16503 . . 3 (𝜑𝑆𝑋)
7 acsmap2d.5 . . . . 5 (𝜑𝑇𝑋)
84, 2, 7mrcssidd 16492 . . . 4 (𝜑𝑇 ⊆ (𝑁𝑇))
9 acsmap2d.6 . . . 4 (𝜑 → (𝑁𝑆) = (𝑁𝑇))
108, 9sseqtr4d 3789 . . 3 (𝜑𝑇 ⊆ (𝑁𝑆))
111, 2, 6, 10acsmapd 17385 . 2 (𝜑 → ∃𝑓(𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓)))
12 simprl 746 . . . . 5 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin))
134adantr 466 . . . . . 6 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝐴 ∈ (Moore‘𝑋))
145adantr 466 . . . . . . . . 9 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆𝐼)
153, 13, 14mrissd 16503 . . . . . . . 8 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆𝑋)
1613, 2, 15mrcssidd 16492 . . . . . . 7 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆 ⊆ (𝑁𝑆))
179adantr 466 . . . . . . . 8 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁𝑆) = (𝑁𝑇))
18 simprr 748 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑇 ⊆ (𝑁 ran 𝑓))
1913, 2mrcssvd 16490 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁 ran 𝑓) ⊆ 𝑋)
2013, 2, 18, 19mrcssd 16491 . . . . . . . . 9 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁𝑇) ⊆ (𝑁‘(𝑁 ran 𝑓)))
21 frn 6193 . . . . . . . . . . . . . 14 (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ran 𝑓 ⊆ (𝒫 𝑆 ∩ Fin))
2221unissd 4596 . . . . . . . . . . . . 13 (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ran 𝑓 (𝒫 𝑆 ∩ Fin))
23 unifpw 8424 . . . . . . . . . . . . 13 (𝒫 𝑆 ∩ Fin) = 𝑆
2422, 23syl6sseq 3798 . . . . . . . . . . . 12 (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) → ran 𝑓𝑆)
2524ad2antrl 699 . . . . . . . . . . 11 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → ran 𝑓𝑆)
2625, 15sstrd 3760 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → ran 𝑓𝑋)
2713, 2, 26mrcidmd 16493 . . . . . . . . 9 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁‘(𝑁 ran 𝑓)) = (𝑁 ran 𝑓))
2820, 27sseqtrd 3788 . . . . . . . 8 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁𝑇) ⊆ (𝑁 ran 𝑓))
2917, 28eqsstrd 3786 . . . . . . 7 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑁𝑆) ⊆ (𝑁 ran 𝑓))
3016, 29sstrd 3760 . . . . . 6 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆 ⊆ (𝑁 ran 𝑓))
3113, 2, 3, 30, 25, 14mrissmrcd 16507 . . . . 5 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → 𝑆 = ran 𝑓)
3212, 31jca 495 . . . 4 ((𝜑 ∧ (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓))) → (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ran 𝑓))
3332ex 397 . . 3 (𝜑 → ((𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑇 ⊆ (𝑁 ran 𝑓)) → (𝑓:𝑇⟶(𝒫 𝑆 ∩ Fin) ∧ 𝑆 = ran 𝑓)))
3433eximdv 1997 . 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 382   = wceq 1630  ∃wex 1851   ∈ wcel 2144   ∩ cin 3720   ⊆ wss 3721  𝒫 cpw 4295  ∪ cuni 4572  ran crn 5250  ⟶wf 6027  ‘cfv 6031  Fincfn 8108  Moorecmre 16449  mrClscmrc 16450  mrIndcmri 16451  ACScacs 16452 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1869  ax-4 1884  ax-5 1990  ax-6 2056  ax-7 2092  ax-8 2146  ax-9 2153  ax-10 2173  ax-11 2189  ax-12 2202  ax-13 2407  ax-ext 2750  ax-rep 4902  ax-sep 4912  ax-nul 4920  ax-pow 4971  ax-pr 5034  ax-un 7095  ax-reg 8652  ax-inf2 8701  ax-ac2 9486  ax-cnex 10193  ax-resscn 10194  ax-1cn 10195  ax-icn 10196  ax-addcl 10197  ax-addrcl 10198  ax-mulcl 10199  ax-mulrcl 10200  ax-mulcom 10201  ax-addass 10202  ax-mulass 10203  ax-distr 10204  ax-i2m1 10205  ax-1ne0 10206  ax-1rid 10207  ax-rnegex 10208  ax-rrecex 10209  ax-cnre 10210  ax-pre-lttri 10211  ax-pre-lttrn 10212  ax-pre-ltadd 10213  ax-pre-mulgt0 10214 This theorem depends on definitions:  df-bi 197  df-an 383  df-or 827  df-3or 1071  df-3an 1072  df-tru 1633  df-ex 1852  df-nf 1857  df-sb 2049  df-eu 2621  df-mo 2622  df-clab 2757  df-cleq 2763  df-clel 2766  df-nfc 2901  df-ne 2943  df-nel 3046  df-ral 3065  df-rex 3066  df-reu 3067  df-rmo 3068  df-rab 3069  df-v 3351  df-sbc 3586  df-csb 3681  df-dif 3724  df-un 3726  df-in 3728  df-ss 3735  df-pss 3737  df-nul 4062  df-if 4224  df-pw 4297  df-sn 4315  df-pr 4317  df-tp 4319  df-op 4321  df-uni 4573  df-int 4610  df-iun 4654  df-iin 4655  df-br 4785  df-opab 4845  df-mpt 4862  df-tr 4885  df-id 5157  df-eprel 5162  df-po 5170  df-so 5171  df-fr 5208  df-se 5209  df-we 5210  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-pred 5823  df-ord 5869  df-on 5870  df-lim 5871  df-suc 5872  df-iota 5994  df-fun 6033  df-fn 6034  df-f 6035  df-f1 6036  df-fo 6037  df-f1o 6038  df-fv 6039  df-isom 6040  df-riota 6753  df-ov 6795  df-oprab 6796  df-mpt2 6797  df-om 7212  df-1st 7314  df-2nd 7315  df-wrecs 7558  df-recs 7620  df-rdg 7658  df-1o 7712  df-oadd 7716  df-er 7895  df-en 8109  df-dom 8110  df-sdom 8111  df-fin 8112  df-r1 8790  df-rank 8791  df-card 8964  df-ac 9138  df-pnf 10277  df-mnf 10278  df-xr 10279  df-ltxr 10280  df-le 10281  df-sub 10469  df-neg 10470  df-nn 11222  df-2 11280  df-3 11281  df-4 11282  df-5 11283  df-6 11284  df-7 11285  df-8 11286  df-9 11287  df-n0 11494  df-z 11579  df-dec 11695  df-uz 11888  df-fz 12533  df-struct 16065  df-ndx 16066  df-slot 16067  df-base 16069  df-tset 16167  df-ple 16168  df-ocomp 16170  df-mre 16453  df-mrc 16454  df-mri 16455  df-acs 16456  df-preset 17135  df-drs 17136  df-poset 17153  df-ipo 17359 This theorem is referenced by:  acsinfd  17387  acsdomd  17388
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