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Theorem posng 4683
Description: Partial ordering of a singleton. (Contributed by Jim Kingdon, 5-Dec-2018.)
Assertion
Ref Expression
posng ((Rel 𝑅𝐴 ∈ V) → (𝑅 Po {𝐴} ↔ ¬ 𝐴𝑅𝐴))

Proof of Theorem posng
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-po 4281 . 2 (𝑅 Po {𝐴} ↔ ∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)))
2 breq2 3993 . . . . . . . . . . 11 (𝑥 = 𝐴 → (𝑦𝑅𝑥𝑦𝑅𝐴))
32anbi2d 461 . . . . . . . . . 10 (𝑥 = 𝐴 → ((𝑧𝑅𝑦𝑦𝑅𝑥) ↔ (𝑧𝑅𝑦𝑦𝑅𝐴)))
4 breq2 3993 . . . . . . . . . 10 (𝑥 = 𝐴 → (𝑧𝑅𝑥𝑧𝑅𝐴))
53, 4imbi12d 233 . . . . . . . . 9 (𝑥 = 𝐴 → (((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥) ↔ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴)))
65anbi2d 461 . . . . . . . 8 (𝑥 = 𝐴 → ((¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
76ralsng 3623 . . . . . . 7 (𝐴 ∈ V → (∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
87ralbidv 2470 . . . . . 6 (𝐴 ∈ V → (∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ∀𝑦 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
9 simpl 108 . . . . . . . . . 10 ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝑦)
10 breq2 3993 . . . . . . . . . 10 (𝑦 = 𝐴 → (𝑧𝑅𝑦𝑧𝑅𝐴))
119, 10syl5ib 153 . . . . . . . . 9 (𝑦 = 𝐴 → ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))
1211biantrud 302 . . . . . . . 8 (𝑦 = 𝐴 → (¬ 𝑧𝑅𝑧 ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
1312bicomd 140 . . . . . . 7 (𝑦 = 𝐴 → ((¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴)) ↔ ¬ 𝑧𝑅𝑧))
1413ralsng 3623 . . . . . 6 (𝐴 ∈ V → (∀𝑦 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴)) ↔ ¬ 𝑧𝑅𝑧))
158, 14bitrd 187 . . . . 5 (𝐴 ∈ V → (∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝑧𝑅𝑧))
1615ralbidv 2470 . . . 4 (𝐴 ∈ V → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ∀𝑧 ∈ {𝐴} ¬ 𝑧𝑅𝑧))
17 breq12 3994 . . . . . . 7 ((𝑧 = 𝐴𝑧 = 𝐴) → (𝑧𝑅𝑧𝐴𝑅𝐴))
1817anidms 395 . . . . . 6 (𝑧 = 𝐴 → (𝑧𝑅𝑧𝐴𝑅𝐴))
1918notbid 662 . . . . 5 (𝑧 = 𝐴 → (¬ 𝑧𝑅𝑧 ↔ ¬ 𝐴𝑅𝐴))
2019ralsng 3623 . . . 4 (𝐴 ∈ V → (∀𝑧 ∈ {𝐴} ¬ 𝑧𝑅𝑧 ↔ ¬ 𝐴𝑅𝐴))
2116, 20bitrd 187 . . 3 (𝐴 ∈ V → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝐴𝑅𝐴))
2221adantl 275 . 2 ((Rel 𝑅𝐴 ∈ V) → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝐴𝑅𝐴))
231, 22syl5bb 191 1 ((Rel 𝑅𝐴 ∈ V) → (𝑅 Po {𝐴} ↔ ¬ 𝐴𝑅𝐴))
Colors of variables: wff set class
Syntax hints:  ¬ wn 3  wi 4  wa 103  wb 104   = wceq 1348  wcel 2141  wral 2448  Vcvv 2730  {csn 3583   class class class wbr 3989   Po wpo 4279  Rel wrel 4616
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-v 2732  df-sbc 2956  df-un 3125  df-sn 3589  df-pr 3590  df-op 3592  df-br 3990  df-po 4281
This theorem is referenced by:  sosng  4684
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