Theorem posng 4845

Description: Partial ordering of a singleton. (Contributed by Jim Kingdon, 5-Dec-2018.)

Assertion

Ref	Expression
posng	⊢ ((Rel 𝑅 ∧ 𝐴 ∈ V) → (𝑅 Po {𝐴} ↔ ¬ 𝐴𝑅𝐴))

Proof of Theorem posng

Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-po 4439	. 2 ⊢ (𝑅 Po {𝐴} ↔ ∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥)))
2		breq2 4132	. . . . . . . . . . 11 ⊢ (𝑥 = 𝐴 → (𝑦𝑅𝑥 ↔ 𝑦𝑅𝐴))
3	2	anbi2d 468	. . . . . . . . . 10 ⊢ (𝑥 = 𝐴 → ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) ↔ (𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴)))
4		breq2 4132	. . . . . . . . . 10 ⊢ (𝑥 = 𝐴 → (𝑧𝑅𝑥 ↔ 𝑧𝑅𝐴))
5	3, 4	imbi12d 234	. . . . . . . . 9 ⊢ (𝑥 = 𝐴 → (((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥) ↔ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝐴)))
6	5	anbi2d 468	. . . . . . . 8 ⊢ (𝑥 = 𝐴 → ((¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
7	6	ralsng 3748	. . . . . . 7 ⊢ (𝐴 ∈ V → (∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
8	7	ralbidv 2550	. . . . . 6 ⊢ (𝐴 ∈ V → (∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ∀𝑦 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
9		simpl 109	. . . . . . . . . 10 ⊢ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝑦)
10		breq2 4132	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → (𝑧𝑅𝑦 ↔ 𝑧𝑅𝐴))
11	9, 10	imbitrid 154	. . . . . . . . 9 ⊢ (𝑦 = 𝐴 → ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝐴))
12	11	biantrud 304	. . . . . . . 8 ⊢ (𝑦 = 𝐴 → (¬ 𝑧𝑅𝑧 ↔ (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝐴))))
13	12	bicomd 141	. . . . . . 7 ⊢ (𝑦 = 𝐴 → ((¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝐴)) ↔ ¬ 𝑧𝑅𝑧))
14	13	ralsng 3748	. . . . . 6 ⊢ (𝐴 ∈ V → (∀𝑦 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝐴) → 𝑧𝑅𝐴)) ↔ ¬ 𝑧𝑅𝑧))
15	8, 14	bitrd 188	. . . . 5 ⊢ (𝐴 ∈ V → (∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝑧𝑅𝑧))
16	15	ralbidv 2550	. . . 4 ⊢ (𝐴 ∈ V → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ∀𝑧 ∈ {𝐴} ¬ 𝑧𝑅𝑧))
17		breq12 4133	. . . . . . 7 ⊢ ((𝑧 = 𝐴 ∧ 𝑧 = 𝐴) → (𝑧𝑅𝑧 ↔ 𝐴𝑅𝐴))
18	17	anidms 401	. . . . . 6 ⊢ (𝑧 = 𝐴 → (𝑧𝑅𝑧 ↔ 𝐴𝑅𝐴))
19	18	notbid 677	. . . . 5 ⊢ (𝑧 = 𝐴 → (¬ 𝑧𝑅𝑧 ↔ ¬ 𝐴𝑅𝐴))
20	19	ralsng 3748	. . . 4 ⊢ (𝐴 ∈ V → (∀𝑧 ∈ {𝐴} ¬ 𝑧𝑅𝑧 ↔ ¬ 𝐴𝑅𝐴))
21	16, 20	bitrd 188	. . 3 ⊢ (𝐴 ∈ V → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝐴𝑅𝐴))
22	21	adantl 277	. 2 ⊢ ((Rel 𝑅 ∧ 𝐴 ∈ V) → (∀𝑧 ∈ {𝐴}∀𝑦 ∈ {𝐴}∀𝑥 ∈ {𝐴} (¬ 𝑧𝑅𝑧 ∧ ((𝑧𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑧𝑅𝑥)) ↔ ¬ 𝐴𝑅𝐴))
23	1, 22	bitrid 192	1 ⊢ ((Rel 𝑅 ∧ 𝐴 ∈ V) → (𝑅 Po {𝐴} ↔ ¬ 𝐴𝑅𝐴))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 104   ↔ wb 105   = wceq 1402   ∈ wcel 2209  ∀wral 2528  Vcvv 2821  {csn 3708   class class class wbr 4128   Po wpo 4437  Rel wrel 4777

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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-v 2823  df-sbc 3052  df-un 3224  df-sn 3714  df-pr 3715  df-op 3717  df-br 4129  df-po 4439

This theorem is referenced by:  sosng  4846