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Theorem posng 4696
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 4294 . 2 (𝑅 Po {𝐴} ↔ ∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)))
2 breq2 4005 . . . . . . . . . . 11 (𝑥 = 𝐴 → (𝑦𝑅𝑥𝑦𝑅𝐴))
32anbi2d 464 . . . . . . . . . 10 (𝑥 = 𝐴 → ((𝑧𝑅𝑦𝑦𝑅𝑥) ↔ (𝑧𝑅𝑦𝑦𝑅𝐴)))
4 breq2 4005 . . . . . . . . . 10 (𝑥 = 𝐴 → (𝑧𝑅𝑥𝑧𝑅𝐴))
53, 4imbi12d 234 . . . . . . . . 9 (𝑥 = 𝐴 → (((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥) ↔ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴)))
65anbi2d 464 . . . . . . . 8 (𝑥 = 𝐴 → ((¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
76ralsng 3632 . . . . . . 7 (𝐴 ∈ V → (∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
87ralbidv 2477 . . . . . 6 (𝐴 ∈ V → (∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ∀𝑦 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
9 simpl 109 . . . . . . . . . 10 ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝑦)
10 breq2 4005 . . . . . . . . . 10 (𝑦 = 𝐴 → (𝑧𝑅𝑦𝑧𝑅𝐴))
119, 10imbitrid 154 . . . . . . . . 9 (𝑦 = 𝐴 → ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))
1211biantrud 304 . . . . . . . 8 (𝑦 = 𝐴 → (¬ 𝑧𝑅𝑧 ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
1312bicomd 141 . . . . . . 7 (𝑦 = 𝐴 → ((¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴)) ↔ ¬ 𝑧𝑅𝑧))
1413ralsng 3632 . . . . . 6 (𝐴 ∈ V → (∀𝑦 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝐴) → 𝑧𝑅𝐴)) ↔ ¬ 𝑧𝑅𝑧))
158, 14bitrd 188 . . . . 5 (𝐴 ∈ V → (∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝑧𝑅𝑧))
1615ralbidv 2477 . . . 4 (𝐴 ∈ V → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ∀𝑧 ∈ {𝐴} ¬ 𝑧𝑅𝑧))
17 breq12 4006 . . . . . . 7 ((𝑧 = 𝐴𝑧 = 𝐴) → (𝑧𝑅𝑧𝐴𝑅𝐴))
1817anidms 397 . . . . . 6 (𝑧 = 𝐴 → (𝑧𝑅𝑧𝐴𝑅𝐴))
1918notbid 667 . . . . 5 (𝑧 = 𝐴 → (¬ 𝑧𝑅𝑧 ↔ ¬ 𝐴𝑅𝐴))
2019ralsng 3632 . . . 4 (𝐴 ∈ V → (∀𝑧 ∈ {𝐴} ¬ 𝑧𝑅𝑧 ↔ ¬ 𝐴𝑅𝐴))
2116, 20bitrd 188 . . 3 (𝐴 ∈ V → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝐴𝑅𝐴))
2221adantl 277 . 2 ((Rel 𝑅𝐴 ∈ V) → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝐴𝑅𝐴))
231, 22bitrid 192 1 ((Rel 𝑅𝐴 ∈ V) → (𝑅 Po {𝐴} ↔ ¬ 𝐴𝑅𝐴))
Colors of variables: wff set class
Syntax hints:  ¬ wn 3  wi 4  wa 104  wb 105   = wceq 1353  wcel 2148  wral 2455  Vcvv 2737  {csn 3592   class class class wbr 4001   Po wpo 4292  Rel wrel 4629
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-v 2739  df-sbc 2963  df-un 3133  df-sn 3598  df-pr 3599  df-op 3601  df-br 4002  df-po 4294
This theorem is referenced by:  sosng  4697
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