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Theorem clsk1indlem1 42405
Description: The ansatz closure function (𝑟 ∈ 𝒫 3o ↦ if(𝑟 = {∅}, {∅, 1o}, 𝑟)) does not have the K1 property of isotony. (Contributed by RP, 6-Jul-2021.)
Hypothesis
Ref Expression
clsk1indlem.k 𝐾 = (𝑟 ∈ 𝒫 3o ↦ if(𝑟 = {∅}, {∅, 1o}, 𝑟))
Assertion
Ref Expression
clsk1indlem1 𝑠 ∈ 𝒫 3o𝑡 ∈ 𝒫 3o(𝑠𝑡 ∧ ¬ (𝐾𝑠) ⊆ (𝐾𝑡))
Distinct variable groups:   𝐾,𝑠,𝑡   𝑠,𝑟,𝑡
Allowed substitution hint:   𝐾(𝑟)

Proof of Theorem clsk1indlem1
StepHypRef Expression
1 tpex 7682 . . . 4 {∅, 1o, 2o} ∈ V
2 snsstp1 4777 . . . 4 {∅} ⊆ {∅, 1o, 2o}
31, 2elpwi2 5304 . . 3 {∅} ∈ 𝒫 {∅, 1o, 2o}
4 df3o2 41691 . . . 4 3o = {∅, 1o, 2o}
54pweqi 4577 . . 3 𝒫 3o = 𝒫 {∅, 1o, 2o}
63, 5eleqtrri 2833 . 2 {∅} ∈ 𝒫 3o
71a1i 11 . . . . 5 (⊤ → {∅, 1o, 2o} ∈ V)
82a1i 11 . . . . . . 7 (⊤ → {∅} ⊆ {∅, 1o, 2o})
9 0ex 5265 . . . . . . . 8 ∅ ∈ V
109snss 4747 . . . . . . 7 (∅ ∈ {∅, 1o, 2o} ↔ {∅} ⊆ {∅, 1o, 2o})
118, 10sylibr 233 . . . . . 6 (⊤ → ∅ ∈ {∅, 1o, 2o})
12 snsstp3 4779 . . . . . . . 8 {2o} ⊆ {∅, 1o, 2o}
1312a1i 11 . . . . . . 7 (⊤ → {2o} ⊆ {∅, 1o, 2o})
14 2oex 8424 . . . . . . . 8 2o ∈ V
1514snss 4747 . . . . . . 7 (2o ∈ {∅, 1o, 2o} ↔ {2o} ⊆ {∅, 1o, 2o})
1613, 15sylibr 233 . . . . . 6 (⊤ → 2o ∈ {∅, 1o, 2o})
1711, 16prssd 4783 . . . . 5 (⊤ → {∅, 2o} ⊆ {∅, 1o, 2o})
187, 17sselpwd 5284 . . . 4 (⊤ → {∅, 2o} ∈ 𝒫 {∅, 1o, 2o})
1918mptru 1549 . . 3 {∅, 2o} ∈ 𝒫 {∅, 1o, 2o}
2019, 5eleqtrri 2833 . 2 {∅, 2o} ∈ 𝒫 3o
21 simpl 484 . . 3 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → {∅} ∈ 𝒫 3o)
22 sseq1 3970 . . . . . 6 (𝑠 = {∅} → (𝑠𝑡 ↔ {∅} ⊆ 𝑡))
23 fveq2 6843 . . . . . . . 8 (𝑠 = {∅} → (𝐾𝑠) = (𝐾‘{∅}))
2423sseq1d 3976 . . . . . . 7 (𝑠 = {∅} → ((𝐾𝑠) ⊆ (𝐾𝑡) ↔ (𝐾‘{∅}) ⊆ (𝐾𝑡)))
2524notbid 318 . . . . . 6 (𝑠 = {∅} → (¬ (𝐾𝑠) ⊆ (𝐾𝑡) ↔ ¬ (𝐾‘{∅}) ⊆ (𝐾𝑡)))
2622, 25anbi12d 632 . . . . 5 (𝑠 = {∅} → ((𝑠𝑡 ∧ ¬ (𝐾𝑠) ⊆ (𝐾𝑡)) ↔ ({∅} ⊆ 𝑡 ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾𝑡))))
2726rexbidv 3172 . . . 4 (𝑠 = {∅} → (∃𝑡 ∈ 𝒫 3o(𝑠𝑡 ∧ ¬ (𝐾𝑠) ⊆ (𝐾𝑡)) ↔ ∃𝑡 ∈ 𝒫 3o({∅} ⊆ 𝑡 ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾𝑡))))
2827adantl 483 . . 3 ((({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) ∧ 𝑠 = {∅}) → (∃𝑡 ∈ 𝒫 3o(𝑠𝑡 ∧ ¬ (𝐾𝑠) ⊆ (𝐾𝑡)) ↔ ∃𝑡 ∈ 𝒫 3o({∅} ⊆ 𝑡 ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾𝑡))))
29 simpr 486 . . . 4 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → {∅, 2o} ∈ 𝒫 3o)
30 fveq2 6843 . . . . . . . 8 (𝑡 = {∅, 2o} → (𝐾𝑡) = (𝐾‘{∅, 2o}))
3130sseq2d 3977 . . . . . . 7 (𝑡 = {∅, 2o} → ((𝐾‘{∅}) ⊆ (𝐾𝑡) ↔ (𝐾‘{∅}) ⊆ (𝐾‘{∅, 2o})))
3231notbid 318 . . . . . 6 (𝑡 = {∅, 2o} → (¬ (𝐾‘{∅}) ⊆ (𝐾𝑡) ↔ ¬ (𝐾‘{∅}) ⊆ (𝐾‘{∅, 2o})))
3332cleq2lem 41968 . . . . 5 (𝑡 = {∅, 2o} → (({∅} ⊆ 𝑡 ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾𝑡)) ↔ ({∅} ⊆ {∅, 2o} ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾‘{∅, 2o}))))
3433adantl 483 . . . 4 ((({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) ∧ 𝑡 = {∅, 2o}) → (({∅} ⊆ 𝑡 ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾𝑡)) ↔ ({∅} ⊆ {∅, 2o} ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾‘{∅, 2o}))))
35 1oex 8423 . . . . . . . 8 1o ∈ V
3635prid2 4725 . . . . . . 7 1o ∈ {∅, 1o}
37 iftrue 4493 . . . . . . . . 9 (𝑟 = {∅} → if(𝑟 = {∅}, {∅, 1o}, 𝑟) = {∅, 1o})
38 clsk1indlem.k . . . . . . . . 9 𝐾 = (𝑟 ∈ 𝒫 3o ↦ if(𝑟 = {∅}, {∅, 1o}, 𝑟))
39 prex 5390 . . . . . . . . 9 {∅, 1o} ∈ V
4037, 38, 39fvmpt 6949 . . . . . . . 8 ({∅} ∈ 𝒫 3o → (𝐾‘{∅}) = {∅, 1o})
4140adantr 482 . . . . . . 7 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → (𝐾‘{∅}) = {∅, 1o})
4236, 41eleqtrrid 2841 . . . . . 6 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → 1o ∈ (𝐾‘{∅}))
43 1n0 8435 . . . . . . . . . . 11 1o ≠ ∅
4443neii 2942 . . . . . . . . . 10 ¬ 1o = ∅
45 eqcom 2740 . . . . . . . . . . . 12 (1o = 2o ↔ 2o = 1o)
46 df-2o 8414 . . . . . . . . . . . . 13 2o = suc 1o
47 df-1o 8413 . . . . . . . . . . . . 13 1o = suc ∅
4846, 47eqeq12i 2751 . . . . . . . . . . . 12 (2o = 1o ↔ suc 1o = suc ∅)
49 suc11reg 9560 . . . . . . . . . . . 12 (suc 1o = suc ∅ ↔ 1o = ∅)
5045, 48, 493bitri 297 . . . . . . . . . . 11 (1o = 2o ↔ 1o = ∅)
5143, 50nemtbir 3037 . . . . . . . . . 10 ¬ 1o = 2o
5244, 51pm3.2ni 880 . . . . . . . . 9 ¬ (1o = ∅ ∨ 1o = 2o)
53 elpri 4609 . . . . . . . . 9 (1o ∈ {∅, 2o} → (1o = ∅ ∨ 1o = 2o))
5452, 53mto 196 . . . . . . . 8 ¬ 1o ∈ {∅, 2o}
5554a1i 11 . . . . . . 7 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → ¬ 1o ∈ {∅, 2o})
56 eqeq1 2737 . . . . . . . . . . 11 (𝑟 = {∅, 2o} → (𝑟 = {∅} ↔ {∅, 2o} = {∅}))
57 id 22 . . . . . . . . . . 11 (𝑟 = {∅, 2o} → 𝑟 = {∅, 2o})
5856, 57ifbieq2d 4513 . . . . . . . . . 10 (𝑟 = {∅, 2o} → if(𝑟 = {∅}, {∅, 1o}, 𝑟) = if({∅, 2o} = {∅}, {∅, 1o}, {∅, 2o}))
5914prid2 4725 . . . . . . . . . . . 12 2o ∈ {∅, 2o}
60 2on0 8429 . . . . . . . . . . . . 13 2o ≠ ∅
61 nelsn 4627 . . . . . . . . . . . . 13 (2o ≠ ∅ → ¬ 2o ∈ {∅})
6260, 61ax-mp 5 . . . . . . . . . . . 12 ¬ 2o ∈ {∅}
63 nelneq2 2859 . . . . . . . . . . . 12 ((2o ∈ {∅, 2o} ∧ ¬ 2o ∈ {∅}) → ¬ {∅, 2o} = {∅})
6459, 62, 63mp2an 691 . . . . . . . . . . 11 ¬ {∅, 2o} = {∅}
6564iffalsei 4497 . . . . . . . . . 10 if({∅, 2o} = {∅}, {∅, 1o}, {∅, 2o}) = {∅, 2o}
6658, 65eqtrdi 2789 . . . . . . . . 9 (𝑟 = {∅, 2o} → if(𝑟 = {∅}, {∅, 1o}, 𝑟) = {∅, 2o})
67 prex 5390 . . . . . . . . 9 {∅, 2o} ∈ V
6866, 38, 67fvmpt 6949 . . . . . . . 8 ({∅, 2o} ∈ 𝒫 3o → (𝐾‘{∅, 2o}) = {∅, 2o})
6968adantl 483 . . . . . . 7 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → (𝐾‘{∅, 2o}) = {∅, 2o})
7055, 69neleqtrrd 2857 . . . . . 6 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → ¬ 1o ∈ (𝐾‘{∅, 2o}))
71 nelss 4008 . . . . . 6 ((1o ∈ (𝐾‘{∅}) ∧ ¬ 1o ∈ (𝐾‘{∅, 2o})) → ¬ (𝐾‘{∅}) ⊆ (𝐾‘{∅, 2o}))
7242, 70, 71syl2anc 585 . . . . 5 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → ¬ (𝐾‘{∅}) ⊆ (𝐾‘{∅, 2o}))
73 snsspr1 4775 . . . . 5 {∅} ⊆ {∅, 2o}
7472, 73jctil 521 . . . 4 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → ({∅} ⊆ {∅, 2o} ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾‘{∅, 2o})))
7529, 34, 74rspcedvd 3582 . . 3 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → ∃𝑡 ∈ 𝒫 3o({∅} ⊆ 𝑡 ∧ ¬ (𝐾‘{∅}) ⊆ (𝐾𝑡)))
7621, 28, 75rspcedvd 3582 . 2 (({∅} ∈ 𝒫 3o ∧ {∅, 2o} ∈ 𝒫 3o) → ∃𝑠 ∈ 𝒫 3o𝑡 ∈ 𝒫 3o(𝑠𝑡 ∧ ¬ (𝐾𝑠) ⊆ (𝐾𝑡)))
776, 20, 76mp2an 691 1 𝑠 ∈ 𝒫 3o𝑡 ∈ 𝒫 3o(𝑠𝑡 ∧ ¬ (𝐾𝑠) ⊆ (𝐾𝑡))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wb 205  wa 397  wo 846   = wceq 1542  wtru 1543  wcel 2107  wne 2940  wrex 3070  Vcvv 3444  wss 3911  c0 4283  ifcif 4487  𝒫 cpw 4561  {csn 4587  {cpr 4589  {ctp 4591  cmpt 5189  suc csuc 6320  cfv 6497  1oc1o 8406  2oc2o 8407  3oc3o 8408
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2704  ax-sep 5257  ax-nul 5264  ax-pr 5385  ax-un 7673  ax-reg 9533
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-nf 1787  df-sb 2069  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2886  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3407  df-v 3446  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4284  df-if 4488  df-pw 4563  df-sn 4588  df-pr 4590  df-tp 4592  df-op 4594  df-uni 4867  df-br 5107  df-opab 5169  df-mpt 5190  df-id 5532  df-eprel 5538  df-fr 5589  df-xp 5640  df-rel 5641  df-cnv 5642  df-co 5643  df-dm 5644  df-suc 6324  df-iota 6449  df-fun 6499  df-fv 6505  df-1o 8413  df-2o 8414  df-3o 8415
This theorem is referenced by:  clsk1independent  42406
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